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1

TALAT Lecture 3207: Solidification Defects in Castings

Description

This lecture provides an introduction to the causes and remedies of the main solidification defects in castings. The students should be able to diagnose the major defects in castings and propose methods of preventing them. Basic knowledge of physics and foundry practice is assumed.

Subjects

aluminium | aluminum | european aluminium association | eaa | talat | training in aluminium application technologies | training | metallurgy | technology | lecture | machining | forming | casting | gas porosity | gas precipitation | air entrapment | cores | shrinkage porosity | macroporosity | microporosity | layer porosity | hot tears | cold cracks | sources of porosity | 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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TALAT Lecture 3207: Solidification Defects in Castings

Description

This lecture provides an introduction to the causes and remedies of the main solidification defects in castings. The students should be able to diagnose the major defects in castings and propose methods of preventing them. Basic knowledge of physics and foundry practice is assumed.

Subjects

aluminium | aluminum | european aluminium association | EAA | Training in Aluminium Application Technologies | training | metallurgy | technology | lecture | machining | forming | casting | gas porosity | gas precipitation | air entrapment | cores | shrinkage porosity | macroporosity | microporosity | layer porosity | hot tears | cold cracks | sources of porosity | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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1.101 Introduction to Civil and Environmental Engineering Design I (MIT) 1.101 Introduction to Civil and Environmental Engineering Design I (MIT)

Description

This sophomore-level course is a project-oriented introduction to the principles and practice of engineering design. Design projects and exercises are chosen that relate to the built and natural environments. Emphasis is placed on achieving function and sustainability through choice of materials and processes, compatibility with natural cycles, and the use of active or adaptive systems. The course also encourages development of hands-on skills, teamwork, and communication; exercises and projects engage students in the building, implementation, and testing of their designs. This sophomore-level course is a project-oriented introduction to the principles and practice of engineering design. Design projects and exercises are chosen that relate to the built and natural environments. Emphasis is placed on achieving function and sustainability through choice of materials and processes, compatibility with natural cycles, and the use of active or adaptive systems. The course also encourages development of hands-on skills, teamwork, and communication; exercises and projects engage students in the building, implementation, and testing of their designs.

Subjects

Design | Design | water resources | water resources | water treatment | water treatment | structures | structures | structural design | structural design | fabrication | fabrication | testing | testing | hardware | hardware | laboratory experiments | laboratory experiments | pH | pH | neutralization | neutralization | hydraulic conductivity | hydraulic conductivity | porosity | porosity | truss | truss | tension | tension | beam bending | beam bending | beam buckling | beam buckling | thermal design | thermal design | heating | heating | cooling | cooling | thermal infrared camera | thermal infrared camera | thermal IR imaging | thermal IR imaging | heat loss | heat loss

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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TALAT Lecture 2401: Fatigue Behaviour and Analysis

Description

This lecture explains why, when and where fatigue problems may arise and the special significance to aluminium as structural material; it helps to understand the effects of material and loading parameters on fatigue; to appreciate the statistical nature of fatigue and its importance in data analysis, evaluation and use; it shows how to estimate fatigue life under service conditions of time-dependent, variable amplitude loading; how to estimate stresses acting in notches and welds with conceptual approaches other than nominal stress; it provides qualitative and quantitative information on the classification of welded details and allow for more sophisticated design procedures. Background in materials engineering, design and fatigue is required.

Subjects

aluminium | aluminum | european aluminium association | eaa | talat | training in aluminium application technologies | training | metallurgy | technology | lecture | design | fatigue | fatigue cracks | susceptibility | cyclic loading | crack growth | crack propagation rate | endurance limit | predictive theories | damage accumulation theories | manson-coffin law | crack growth laws | ideal cumulative damage theory | fatigue data analysis | middle-cycle fatigue range | high-cycle fatigue range | fatigue diagrams | linear p-s-n curves | non-linear p-s-n curves | service behaviour | time dependent loads | load spectrum | cycle counting | rain-flow cycle counting method | service behaviour fatigue test | analytical life estimation | damage accumulation | palmgren-miner linear damage accumulation hypothesis | strain | fatigue life | notch theory | strain-life diagram | weld imperfections | static strength | fatigue strength | cracks | porosity | inclusions | oxides | lack of penetration | weld shape | lack of fusion | geometric misalignment | arc strike | spatter | post-weld mechanical imperfections | 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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Cu-10.5 wt% P

Description

This is an example of a hypereutectic alloy. On slow cooling the liquid first solidified as copper phosphide dendrites at approximately 850C. The remaining liquid solidified as a eutectic at 714C. The copper phosphide is brittle and has cracked due to shrinkage stresses. Note that because of its narrow composition range, there is no coring in the dendrites. This sample also contains some porosity.

Subjects

alloy | bronze | copper | copper phosphide | dendrite | hypoeutectic | metal | phosphorus | porosity | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Cu-10.5 wt% P

Description

This is an example of a hypereutectic alloy. On slow cooling the liquid first solidified as copper phosphide dendrites at approximately 850C. The remaining liquid solidified as a eutectic at 714C. The copper phosphide is brittle and has cracked due to shrinkage stresses. Note that because of its narrow composition range, there is no coring in the dendrites. This sample also contains some porosity.

Subjects

alloy | bronze | copper | copper phosphide | dendrite | hypoeutectic | metal | phosphorus | porosity | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Gun metal bronze displaying coring.

Description

An alloy of bronze containing zinc. Some porosity is visible. The variation in colour is attributable to the cooling being rapid enough to prevent solid state diffusion and hence a concentration variation appears.

Subjects

alloy | bronze | copper | coring | metal | porosity | tin | 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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Cu-10.5 wt% P

Description

This is an example of a hypereutectic alloy. On slow cooling the liquid first solidified as copper phosphide dendrites at approximately 850C. The remaining liquid solidified as a eutectic at 714C. The copper phosphide is brittle and has cracked due to shrinkage stresses. Note that because of its narrow composition range, there is no coring in the dendrites. This sample also contains some porosity.

Subjects

alloy | bronze | copper | copper phosphide | dendrite | hypoeutectic | metal | phosphorus | porosity | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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http://core.materials.ac.uk/rss/doitpoms_images.xml

Attribution

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Gun metal bronze displaying coring.

Description

An alloy of bronze containing zinc. Some porosity is visible. The variation in colour is attributable to the cooling being rapid enough to prevent solid state diffusion and hence a concentration variation appears.

Subjects

alloy | bronze | copper | coring | metal | porosity | tin | 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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Cu-10.5 wt% P

Description

This is an example of a hypereutectic alloy. On slow cooling the liquid first solidified as copper phosphide dendrites at approximately 850C. The remaining liquid solidified as a eutectic at 714C. The copper phosphide is brittle and has cracked due to shrinkage stresses. Note that because of its narrow composition range, there is no coring in the dendrites. This sample also contains some porosity.

Subjects

alloy | bronze | copper | copper phosphide | dendrite | hypoeutectic | metal | phosphorus | porosity | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Site sourced from

http://core.materials.ac.uk/rss/doitpoms_images.xml

Attribution

Click to get HTML | Click to get attribution | Click to get URL

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Gun metal bronze displaying coring.

Description

An alloy of bronze containing zinc. Some porosity is visible. The variation in colour is attributable to the cooling being rapid enough to prevent solid state diffusion and hence a concentration variation appears.

Subjects

alloy | bronze | copper | coring | metal | porosity | tin | 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/

Site sourced from

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Attribution

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Cu-10.5 wt% P

Description

This is an example of a hypereutectic alloy. On slow cooling the liquid first solidified as copper phosphide dendrites at approximately 850C. The remaining liquid solidified as a eutectic at 714C. The copper phosphide is brittle and has cracked due to shrinkage stresses. Note that because of its narrow composition range, there is no coring in the dendrites. This sample also contains some porosity.

Subjects

alloy | bronze | copper | copper phosphide | dendrite | hypoeutectic | metal | phosphorus | porosity | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Site sourced from

http://core.materials.ac.uk/rss/doitpoms_images.xml

Attribution

Click to get HTML | Click to get attribution | Click to get URL

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Gun metal bronze displaying coring.

Description

An alloy of bronze containing zinc. Some porosity is visible. The variation in colour is attributable to the cooling being rapid enough to prevent solid state diffusion and hence a concentration variation appears.

Subjects

alloy | bronze | copper | coring | metal | porosity | tin | 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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Porosity in fibre reinforced magnesium aluminosilicate ceramic

Description

The micrograph shows black areas of porosity in fibre reinforced magnesium aluminosilicate ceramic.

Subjects

ceramic | fibre | magnesium aluminosilicate | porosity | 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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TALAT Lecture 4203: Weld Imperfections

Description

This lecture illustrates the type of weld imperfections and their causes and corrections. Basic knowledge in metallurgy of aluminium is assumed.

Subjects

aluminium | aluminum | european aluminium association | eaa | talat | training in aluminium application technologies | training | metallurgy | technology | lecture | joining | fastening | mechanical | arc welding | external irregularities | butt welds | misalignment of edges | internal irregularities | gas absorption | hydrogen content | porosity | formation of pores | pore forming zone | tig welds | 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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Water: Groundwater

Description

Level: Intermediate

Subjects

aquifer | darcy's law | groundwater | hydraulic conductivity | oasis | permeability | porosity | water table | water underground | ukoer | geesoer | geography | e | Physical sciences | F000

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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TALAT Lecture 2401: Fatigue Behaviour and Analysis

Description

This lecture explains why, when and where fatigue problems may arise and the special significance to aluminium as structural material; it helps to understand the effects of material and loading parameters on fatigue; to appreciate the statistical nature of fatigue and its importance in data analysis, evaluation and use; it shows how to estimate fatigue life under service conditions of time-dependent, variable amplitude loading; how to estimate stresses acting in notches and welds with conceptual approaches other than nominal stress; it provides qualitative and quantitative information on the classification of welded details and allow for more sophisticated design procedures. Background in materials engineering, design and fatigue is required.

Subjects

aluminium | aluminum | european aluminium association | EAA | Training in Aluminium Application Technologies | training | metallurgy | technology | lecture | design | fatigue | fatigue cracks | susceptibility | cyclic loading | crack growth | crack propagation rate | endurance limit | predictive theories | damage accumulation theories | Manson-Coffin law | crack growth laws | ideal cumulative damage theory | fatigue data analysis | middle-cycle fatigue range | high-cycle fatigue range | fatigue diagrams | linear P-S-N curves | non-linear P-S-N curves | service behaviour | time dependent loads | load spectrum | cycle counting | rain-flow cycle counting method | service behaviour fatigue test | analytical life estimation | damage accumulation | Palmgren-Miner linear damage accumulation hypothesis | strain | fatigue life | notch theory | strain-life diagram | weld imperfections | static strength | fatigue strength | cracks | porosity | inclusions | oxides | lack of penetration | weld shape | lack of fusion | geometric misalignment | arc strike | spatter | post-weld mechanical imperfections | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Gun metal bronze displaying coring.

Description

An alloy of bronze containing zinc. Some porosity is visible. The variation in colour is attributable to the cooling being rapid enough to prevent solid state diffusion and hence a concentration variation appears.

Subjects

alloy | bronze | copper | coring | metal | porosity | tin | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Site sourced from

http://core.materials.ac.uk/rss/doitpoms_images.xml

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Gun metal bronze displaying coring.

Description

An alloy of bronze containing zinc. Some porosity is visible. The variation in colour is attributable to the cooling being rapid enough to prevent solid state diffusion and hence a concentration variation appears.

Subjects

alloy | bronze | copper | coring | metal | porosity | tin | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Site sourced from

http://core.materials.ac.uk/rss/doitpoms_images.xml

Attribution

Click to get HTML | Click to get attribution | Click to get URL

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Gun metal bronze displaying coring.

Description

An alloy of bronze containing zinc. Some porosity is visible. The variation in colour is attributable to the cooling being rapid enough to prevent solid state diffusion and hence a concentration variation appears.

Subjects

alloy | bronze | copper | coring | metal | porosity | tin | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Site sourced from

http://core.materials.ac.uk/rss/doitpoms_images.xml

Attribution

Click to get HTML | Click to get attribution | Click to get URL

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Gun metal bronze displaying coring.

Description

An alloy of bronze containing zinc. Some porosity is visible. The variation in colour is attributable to the cooling being rapid enough to prevent solid state diffusion and hence a concentration variation appears.

Subjects

alloy | bronze | copper | coring | metal | porosity | tin | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Site sourced from

http://core.materials.ac.uk/rss/doitpoms_images.xml

Attribution

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Porosity in fibre reinforced magnesium aluminosilicate ceramic

Description

The micrograph shows black areas of porosity in fibre reinforced magnesium aluminosilicate ceramic.

Subjects

ceramic | fibre | magnesium aluminosilicate | porosity | DoITPoMS | University of Cambridge | micrograph | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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1.101 Introduction to Civil and Environmental Engineering Design I (MIT)

Description

This sophomore-level course is a project-oriented introduction to the principles and practice of engineering design. Design projects and exercises are chosen that relate to the built and natural environments. Emphasis is placed on achieving function and sustainability through choice of materials and processes, compatibility with natural cycles, and the use of active or adaptive systems. The course also encourages development of hands-on skills, teamwork, and communication; exercises and projects engage students in the building, implementation, and testing of their designs.

Subjects

Design | water resources | water treatment | structures | structural design | fabrication | testing | hardware | laboratory experiments | pH | neutralization | hydraulic conductivity | porosity | truss | tension | beam bending | beam buckling | thermal design | heating | cooling | thermal infrared camera | thermal IR imaging | heat loss

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 https://ocw.mit.edu/terms/index.htm

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TALAT Lecture 4203: Weld Imperfections

Description

This lecture illustrates the type of weld imperfections and their causes and corrections. Basic knowledge in metallurgy of aluminium is assumed.

Subjects

aluminium | aluminum | european aluminium association | EAA | Training in Aluminium Application Technologies | training | metallurgy | technology | lecture | joining | fastening | mechanical | arc welding | external irregularities | butt welds | misalignment of edges | internal irregularities | gas absorption | hydrogen content | porosity | formation of pores | pore forming zone | TIG welds | corematerials | ukoer

License

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Particle technology : fluid flow in porous media

Description

This open educational resource was released through the Higher Education Academy Engineering Subject Centre Open Engineering Resources Pilot project. The project was funded by HEFCE and the JISC/HE Academy UKOER programme.

Subjects

ukoer | engscoer | cc-by | engcetl | loughborough university | higher education | learning | loughboroughunioer | engineering | richard holdich | particles | particle technology | bsc | beng | meng | msc | darcy's law | kozeny carman | modified reynolds number | friction factor | carman | ergun | deep bed filtration | fluidisation | porosity | voidage | friction factor plot | reynolds number | Engineering | H000

License

Attribution 2.0 UK: England & Wales Attribution 2.0 UK: England & Wales http://creativecommons.org/licenses/by/2.0/uk/ http://creativecommons.org/licenses/by/2.0/uk/

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