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Court House, Ennis, Co. Clare Court House, Ennis, Co. Clare

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courthouse | courthouse | ennis | ennis | glassnegative | glassnegative | countyclare | countyclare | danieloconnell | danieloconnell | tomsteele | tomsteele | honesttom | honesttom | robertfrench | robertfrench | williamlawrence | williamlawrence | nationallibraryofireland | nationallibraryofireland | lawrencecollection | lawrencecollection | lawrencephotographicstudio | lawrencephotographicstudio | thelawrencephotographcollection | thelawrencephotographcollection | steelesrock | steelesrock | headpacificator | headpacificator

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A medium carbon low alloyed structural steel

Description

The steel sample was etched in 4% picral solution first and revealed the presence of pearlite and carbides distinctly. Further tint etching in SMB resulted in the straw coloured martensite to appear as a band. Retained austenite is appearing as very fine white particles. The bainite is appearing as bluish-black background between the martensite constituents. Coarse dark grains are pearlite. Microhardness measurements and SEM studies further proved the constituents identity. Conventional nital etching is not successful in delineating all the micro-constituents so distinctly.

Subjects

steel | retained austenite | low alloyed steel | structural steel | corematerials | ukoer | Engineering | H000

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Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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A medium carbon low alloyed structural steel

Description

The steel sample was etched in 4% picral solution first and revealed the presence of pearlite and carbides distinctly. Further tint etching in SMB resulted in the straw coloured martensite to appear as a band. Retained austenite is appearing as very fine white particles. The bainite is appearing as bluish-black background between the martensite constituents. Coarse dark grains are pearlite. Microhardness measurements and SEM studies further proved the constituents identity. Conventional nital etching is not successful in delineating all the micro-constituents so distinctly.

Subjects

steel | retained austenite | low alloyed steel | structural steel | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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A medium carbon low alloyed structural steel

Description

The steel sample was etched in 4% picral solution first and revealed the presence of pearlite and carbides distinctly. Further tint etching in SMB resulted in the straw coloured martensite to appear as a band. Retained austenite is appearing as very fine white particles. The bainite is appearing as bluish-black background between the martensite constituents. Coarse dark grains are pearlite. Microhardness measurements and SEM studies further proved the constituents identity. Conventional nital etching is not successful in delineating all the micro-constituents so distinctly.

Subjects

steel | retained austenite | low alloyed steel | structural steel | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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A medium carbon low alloyed structural steel

Description

The steel sample was etched in 4% picral solution first and revealed the presence of pearlite and carbides distinctly. Further tint etching in SMB resulted in the straw coloured martensite to appear as a band. Retained austenite is appearing as very fine white particles. The bainite is appearing as bluish-black background between the martensite constituents. Coarse dark grains are pearlite. Microhardness measurements and SEM studies further proved the constituents identity. Conventional nital etching is not successful in delineating all the micro-constituents so distinctly.

Subjects

steel | retained austenite | low alloyed steel | structural steel | corematerials | ukoer

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A medium carbon low alloyed structural steel

Description

The steel sample was etched in 4% picral solution first and revealed the presence of pearlite and carbides distinctly. Further tint etching in SMB resulted in the straw coloured martensite to appear as a band. Retained austenite is appearing as very fine white particles. The bainite is appearing as bluish-black background between the martensite constituents. Coarse dark grains are pearlite. Microhardness measurements and SEM studies further proved the constituents identity. Conventional nital etching is not successful in delineating all the micro-constituents so distinctly.

Subjects

steel | retained austenite | low alloyed steel | structural steel | corematerials | ukoer

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A medium carbon low alloyed structural steel

Description

The steel sample was etched in 4% picral solution first and revealed the presence of pearlite and carbides distinctly. Further tint etching in SMB resulted in the straw coloured martensite to appear as a band. Retained austenite is appearing as very fine white particles. The bainite is appearing as bluish-black background between the martensite constituents. Coarse dark grains are pearlite. Microhardness measurements and SEM studies further proved the constituents identity. Conventional nital etching is not successful in delineating all the micro-constituents so distinctly.

Subjects

steel | retained austenite | low alloyed steel | structural steel | corematerials | ukoer

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[Sailor at Naval Air Station Corpus Christi, Bethlehem Steel Corporation]

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wwii | sailors | worldwarii | ww2 | usnavy | nas | worldwartwo | unitedstatesnavy | navalairstationcorpuschristi | airbases | bethlehemsteelcorporation | truaxfield | mittalsteelcompany | internationalsteelgroup

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[Consolidated PBY-3 Catalina at Naval Air Station Corpus Christi, Bethlehem Steel Corporation]

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wwii | worldwarii | ww2 | usnavy | nas | seaplanes | worldwartwo | unitedstatesnavy | pby | navalairstationcorpuschristi | hangars | airbases | consolidatedaircraft | bethlehemsteelcorporation | truaxfield | consolidatedaircraftcorporation | mittalsteelcompany | internationalsteelgroup | consolidatedaircraftfirm

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[Floatplanes in Hangar at Naval Air Station Corpus Christi, Bethlehem Steel Corporation]

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wwii | sailors | bicycles | worldwarii | ww2 | usnavy | nas | naf | worldwartwo | unitedstatesnavy | navalairstationcorpuschristi | hangars | floatplanes | biplanes | n3n | monoplanes | os2u | airbases | bethlehemsteelcorporation | truaxfield | voughtaircraft | mittalsteelcompany | internationalsteelgroup | navalaircraftfactoryus | kingfisherreconnaissanceaircraft

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[Consolidated PBY-3 Catalina and Control Tower at Naval Air Station Corpus Christi, Bethlehem Steel Corporation]

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wwii | worldwarii | ww2 | usnavy | nas | seaplanes | worldwartwo | unitedstatesnavy | pby | navalairstationcorpuschristi | hangars | airbases | consolidatedaircraft | bethlehemsteelcorporation | truaxfield | consolidatedaircraftcorporation | mittalsteelcompany | internationalsteelgroup | consolidatedaircraftfirm

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Estee Lauder with oilman Algur Meadows celebrating New Year's at Club 265 Estee Lauder with oilman Algur Meadows celebrating New Year's at Club 265

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holidays | holidays | florida | florida | parties | parties | newyear | newyear | newyearseve | newyearseve | clubs | clubs | palmbeach | palmbeach | palmbeachcounty | palmbeachcounty | esteelauder | esteelauder | bertmorgan | bertmorgan | royalpoincianaway | royalpoincianaway | club265 | club265 | algurmeadows | algurmeadows

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4.440 Basic Structural Design (MIT) 4.440 Basic Structural Design (MIT)

Description

This course provides students with a basic knowledge of structural analysis and design for buildings, bridges and other structures. The course emphasizes the historical development of structural form and the evolution of structural design knowledge, from Gothic cathedrals to long span suspension bridges. Students will investigate the behavior of structural systems and elements through design exercises, case studies, and load testing of models. Students will design structures using timber, masonry, steel, and concrete and will gain an appreciation of the importance of structural design today, with an emphasis on environmental impact of large scale construction. This course provides students with a basic knowledge of structural analysis and design for buildings, bridges and other structures. The course emphasizes the historical development of structural form and the evolution of structural design knowledge, from Gothic cathedrals to long span suspension bridges. Students will investigate the behavior of structural systems and elements through design exercises, case studies, and load testing of models. Students will design structures using timber, masonry, steel, and concrete and will gain an appreciation of the importance of structural design today, with an emphasis on environmental impact of large scale construction.

Subjects

structural analysis | structural analysis | structural design | structural design | historical structures | historical structures | environment | environment | sustainable construction | sustainable construction | graphical analysis | graphical analysis | environmental assessment | environmental assessment | beam | beam | column | column | truss | truss | frame | frame | arch | arch | structural systems | structural systems | model building | model building | design exercises | design exercises | compression | compression | tension | tension | axial forces | axial forces | structural failures | structural failures | timber | timber | steel | steel | concrete | concrete | sustainable structures | sustainable structures

License

Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative Commons License (Attribution-NonCommercial-ShareAlike). For further information see http://ocw.mit.edu/terms/index.htm

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3.40J Physical Metallurgy (MIT) 3.40J Physical Metallurgy (MIT)

Description

The central point of this course is to provide a physical basis that links the structure of materials with their properties, focusing primarily on metals. With this understanding in hand, the concepts of alloy design and microstructural engineering are also discussed, linking processing and thermodynamics to the structure and properties of metals. The central point of this course is to provide a physical basis that links the structure of materials with their properties, focusing primarily on metals. With this understanding in hand, the concepts of alloy design and microstructural engineering are also discussed, linking processing and thermodynamics to the structure and properties of metals.

Subjects

point | point | line and interfacial defects | line and interfacial defects | stereographic projection | stereographic projection | annealing | annealing | spinodal decomposition | spinodal decomposition | nucleation | nucleation | growth | growth | particle coarsening | particle coarsening | structure-function relationships | structure-function relationships | interstitial and substitutional solid solutions | interstitial and substitutional solid solutions | processing and structure of metals | processing and structure of metals | strength | strength | stiffness | stiffness | and ductility | and ductility | crystallography | crystallography | phase transformations | phase transformations | microstructural evolution | microstructural evolution | steel | steel | aluminum | aluminum

License

Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative Commons License (Attribution-NonCommercial-ShareAlike). For further information see http://ocw.mit.edu/terms/index.htm

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3.A04 Modern Blacksmithing and Physical Metallurgy (MIT) 3.A04 Modern Blacksmithing and Physical Metallurgy (MIT)

Description

Physical metallurgy encompasses the relationships between the composition, structure, processing history and properties of metallic materials. In this seminar you'll be introduced to metallurgy in a particularly "physical" way. We will do blacksmithing, metal casting, machining, and welding, using both traditional and modern methods. The seminar meets once per week for an evening laboratory session, and once per week for discussion of issues in materials science and engineering that tie in to the laboratory work. Students will begin by completing some specified projects and progress to designing and fabricating one forged and one cast piece. Physical metallurgy encompasses the relationships between the composition, structure, processing history and properties of metallic materials. In this seminar you'll be introduced to metallurgy in a particularly "physical" way. We will do blacksmithing, metal casting, machining, and welding, using both traditional and modern methods. The seminar meets once per week for an evening laboratory session, and once per week for discussion of issues in materials science and engineering that tie in to the laboratory work. Students will begin by completing some specified projects and progress to designing and fabricating one forged and one cast piece.

Subjects

freshman seminar | freshman seminar | forge | forge | casting | casting | lost-wax | lost-wax | steel | steel | phase diagrams | phase diagrams | student work | student work | photos | photos

License

Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative Commons License (Attribution-NonCommercial-ShareAlike). For further information see http://ocw.mit.edu/terms/index.htm

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3.A27 Case Studies in Forensic Metallurgy (MIT) 3.A27 Case Studies in Forensic Metallurgy (MIT)

Description

TV programs such as "Law and Order" show how forensic experts are called upon to give testimony that often determines the outcome of court cases. Engineers are one class of expert who can help display evidence in a new light to solve cases. In this seminar you will be part of the problem-solving process, working through both previously solved and unsolved cases. Each week we will investigate cases, from the facts that make up each side to the potential evidence we can use as engineers to expose culprits. The cases range from disintegrating airplane engines to gas main explosions to Mafia murders. This seminar will be full of discussions about the cases and creative approaches to reaching the solutions. The approach is hands-on so you will have a chance to participate in the process, not TV programs such as "Law and Order" show how forensic experts are called upon to give testimony that often determines the outcome of court cases. Engineers are one class of expert who can help display evidence in a new light to solve cases. In this seminar you will be part of the problem-solving process, working through both previously solved and unsolved cases. Each week we will investigate cases, from the facts that make up each side to the potential evidence we can use as engineers to expose culprits. The cases range from disintegrating airplane engines to gas main explosions to Mafia murders. This seminar will be full of discussions about the cases and creative approaches to reaching the solutions. The approach is hands-on so you will have a chance to participate in the process, not

Subjects

case studies | case studies | failure | failure | fracture | fracture | seminar | seminar | stainless steel | stainless steel | aluminum | aluminum | catastrophic failure | catastrophic failure | soldering | soldering | brazing | brazing | welding | welding | corrosion | corrosion | oxidation | oxidation | fatigue | fatigue

License

Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative Commons License (Attribution-NonCommercial-ShareAlike). For further information see http://ocw.mit.edu/terms/index.htm

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Happy 8th Birthday, Flickr Commons ! 6 days to go (LOC) Happy 8th Birthday, Flickr Commons ! 6 days to go (LOC)

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boston | boston | bridges | bridges | trains | trains | amtrak | amtrak | fortpoint | fortpoint | libraryofcongress | libraryofcongress | bigdig | bigdig | 1904 | 1904 | boxcars | boxcars | channels | channels | southstation | southstation | railroads | railroads | fortpointchannel | fortpointchannel | streetscapes | streetscapes | thenandnow | thenandnow | thennow | thennow | railroadcars | railroadcars | suffolkcounty | suffolkcounty | bostonmassachusetts | bostonmassachusetts | newhavenrailroad | newhavenrailroad | grandtrunkrailway | grandtrunkrailway | liftbridges | liftbridges | bostonmainerailroad | bostonmainerailroad | massachusettsbaytransportationauthority | massachusettsbaytransportationauthority | oldcolonyrailroad | oldcolonyrailroad | detroitpublishingcompany | detroitpublishingcompany | towerbridges | towerbridges | rollingbridgepark | rollingbridgepark | newyorknewhavenhartfordrailroad | newyorknewhavenhartfordrailroad | oldcolonyrailroadbridge | oldcolonyrailroadbridge | pennsylvaniasteelcompany | pennsylvaniasteelcompany | fortpointchannelbridge | fortpointchannelbridge | bostonalbanyrailroad | bostonalbanyrailroad | 017090 | 017090 | newyorknewenglandrailroad | newyorknewenglandrailroad | rollingliftbridges | rollingliftbridges | bostonprovidencerailroad | bostonprovidencerailroad | bostonterminalcompany | bostonterminalcompany | happybirthdayflickrcommons | happybirthdayflickrcommons | fortpointchannelrollingliftbridge | fortpointchannelrollingliftbridge | scherzerrollingliftbridges | scherzerrollingliftbridges | thesixtrackscherzerrollingliftbridge | thesixtrackscherzerrollingliftbridge | williamscherzer | williamscherzer | suburbanloop | suburbanloop | newhavenrailroadsystem | newhavenrailroadsystem | southterminalstation | southterminalstation | holbrookcabotdaly | holbrookcabotdaly | southbaychannel | southbaychannel | maritimechannels | maritimechannels

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Austenitic stainless steel

Description

Shows the grain structure of an austenitic stainless steel NF709, observed using light microscopy on a specimen polished and etched electrolytically using 10% oxalic acid solution in water. Many of the grains contain annealing twins. NF709 is a creep-resistant austenitic stainless steel used in the construction of highly sophisticated power generation units. Source: http://www.msm.cam.ac.uk/phase-trans/abstracts/annealing.twin.html.

Subjects

alloy | annealing twins | austenite | grain | metal | stainless steel | steel | doitpoms | university of cambridge | micrograph | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Austenitic stainless steel

Description

This is a transmission electron micrograph taken at 200 kV, from a thin foil sample of "302AA" austenitic stainless steel. The sample was cold-deformed by rolling and then annealed at 704 °C for one hour. The image shows a recrystallised grain which is relatively free of dislocations, surrounded by a deformed matrix which has a high dislocation density. The recrystallised grain contains annealing twins (parallel bands with different contrast). Source: http://www.msm.cam.ac.uk/phase-trans/abstracts/annealing.twin.html.

Subjects

alloy | annealing twins | austenite | dislocation | grain | metal | recrystallisation | stainless steel | steel | doitpoms | university of cambridge | micrograph | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Austenitic stainless steel

Description

This is a transmission electron micrograph taken at 200 kV, from a thin foil sample of "302AA" austenitic stainless steel. The sample was cold-deformed by rolling and then annealed at 704 °C for one hour. The image shows recrystallised grains which which show uniform contrast because they are relatively free of dislocations, surrounded by a deformed matrix which has a high dislocation density. The recrystallised grain contains annealing twins (parallel bands with different contrast. The steps at the top left-hand corner are simply steps in annealing twin boundaries.Source: http://www.msm.cam.ac.uk/phase-trans/abstracts/annealing.twin.html.

Subjects

alloy | annealing twins | austenite | carbon | dislocation | grain | iron | metal | recrystallisation | stainless steel | steel | doitpoms | university of cambridge | micrograph | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Austenitic stainless steel

Description

This is a transmission electron micrograph taken at 200 kV, from a thin foil sample of "302AA" austenitic stainless steel. The sample was cold-deformed by rolling and then annealed at 704 °C for one hour. The image shows a beautiful picture of annealing twins. Notice how the ends of annealing twins are flat, the shape being determined by a minimisation of interfacial energy. Mechanical twins, by contrast, are lenticular (lens like) with sharply pointed ends to minimise the strain energy due to the twinning shear. Annealing twins do not cause any deformation so strain energy minimisation is not an issue. This is also the reason why there is no strain field contrast visible at the tips of the annealing twins. Source: http://www.msm.cam.ac.uk/phase-trans/abstracts/annealing.twin.html.

Subjects

alloy | annealing twins | austenite | carbon | dislocation | grain | iron | metal | recrystallisation | stainless steel | steel | doitpoms | university of cambridge | micrograph | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Austenitic stainless steel

Description

This is a transmission electron micrograph taken at 200 kV, from a thin foil sample of "302AA" austenitic stainless steel. The sample was cold-deformed by rolling and then annealed at 704 °C for one hour. The image shows a mixture of deformed and recrystallised grains. Source: http://www.msm.cam.ac.uk/phase-trans/abstracts/recryst.html.

Subjects

alloy | annealing twins | austenite | carbon | dislocation | grain | iron | metal | recrystallisation | stainless steel | steel | doitpoms | university of cambridge | micrograph | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Tyne Bridge and Newcastle Quayside, 1950 Tyne Bridge and Newcastle Quayside, 1950

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road | road | city | city | roof | roof | light | light | shadow | shadow | chimney | chimney | sky | sky | cloud | cloud | abstract | abstract | brick | brick | clock | clock | industry | industry | church | church | window | window | grass | grass | wheel | wheel | metal | metal | stone | stone | wall | wall | stairs | stairs | fence | fence | buildings | buildings | river | river | daylight | daylight | interesting | interesting | cabin | cabin | gate | gate | iron | iron | industrial | industrial | ship | ship | hand | hand | post | post | crane | crane | timber | timber | steel | steel | debris | debris | bank | bank | rail | rail | vessel | vessel | structure | structure | tyne | tyne | gateshead | gateshead | tynebridge | tynebridge | deck | deck | soil | soil | step | step | 1950s | 1950s | frame | frame | vegetation | vegetation | vehicle | vehicle | mast | mast | 1950 | 1950 | swingbridge | swingbridge | newcastleupontyne | newcastleupontyne | quayside | quayside | digitalimage | digitalimage | streetviews | streetviews | premises | premises | rivertyne | rivertyne | twentiethcentury | twentiethcentury | unsual | unsual | blackandwhitephotograph | blackandwhitephotograph | northeastofengland | northeastofengland | turnersltd | turnersltd | scenicviewsofnewcastle | scenicviewsofnewcastle

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Austenitic stainless steel

Description

This is a transmission electron micrograph taken at 200 kV, from a thin foil sample of "302AA" austenitic stainless steel. The sample was cold-deformed by rolling and then annealed at 704 °C for one hour. The image shows a mixture of recrystallised and deformed grains. There are some stacking faults (ribbon like contrast) in the recrystallised grains; austenitic stainless steels have a relatively low stacking fault energy. Source: http://www.msm.cam.ac.uk/phase-trans/abstracts/recryst.html.

Subjects

alloy | annealing twins | austenite | carbon | dislocation | grain | iron | metal | recrystallisation | stainless steel | steel | doitpoms | university of cambridge | micrograph | corematerials | ukoer | Engineering | H000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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3.14 Physical Metallurgy (MIT) 3.14 Physical Metallurgy (MIT)

Description

The central point of this course is to provide a physical basis that links the structure of metals with their properties. With this understanding in hand, the concepts of alloy design and microstructural engineering are also discussed, linking processing and thermodynamics to the structure and properties of metals. The central point of this course is to provide a physical basis that links the structure of metals with their properties. With this understanding in hand, the concepts of alloy design and microstructural engineering are also discussed, linking processing and thermodynamics to the structure and properties of metals.

Subjects

processing | structure | and properties of metals and alloys | processing | structure | and properties of metals and alloys | strength | stiffness | and ductility | strength | stiffness | and ductility | crystallography | defects | microstructure | crystallography | defects | microstructure | phase transformations | phase transformations | microstructural evolution | microstructural evolution | alloy thermodynamics and kinetics | alloy thermodynamics and kinetics | structural engineering alloys | structural engineering alloys | steel | steel | aluminum | aluminum

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