Searching for rapid solidification : 8 results found | RSS Feed for this search

TALAT Lecture 1255: Metallurgical Background to Alloy Selection and Specifications for Wrought, Cast and Special Applications

Description

This lecture outlines the metallurgical principles of alloy selection and specifications. Basic knowledge of physics and chemistry and some familiarity with TALAT lectures 1201 through 1205 is assumed.

Subjects

aluminium | aluminum | european aluminium association | EAA | Training in Aluminium Application Technologies | training | metallurgy | technology | lecture | alloy selection | wrought alloys | cast alloys | aerospace alloys | hot isostatic processing | particulate processing | rapid solidification processing | particulate metal matrix composites | Al-Li based alloys | corematerials | ukoer

License

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

Site sourced from

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

Attribution

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

All metadata

See all metadata

TALAT Lecture 1401: Aluminium Powder Metallurgy

Description

This lecture outlines the differences between conventionally produced and powder metallurgy aluminium with respect to potential uses; it aims at learning about the various processes to produce and to consolidate alloy powders; it illustrates the extension of the useful property range beyond that of limits of conventionally processed aluminium alloys; it explains the advantages and disadvantages of aluminium produced by powder metallurgy; it shows the potential of aluminium produced by the route of powder metallurgy. Knowledge in metallurgy, materials science, materials engineering is assumed.

Subjects

aluminium | aluminum | european aluminium association | EAA | Training in Aluminium Application Technologies | training | metallurgy | technology | lecture | advanced materials | powder fabrication | rapid solidification | caracterisation | powder | precompaction | cold compaction | sintering | hot consolidation | post consolidation | spray forming | P/M 7 XXX alloys | high strength alloys | elevated temperatures | mechanical alloying | high modulus | safety | corematerials | ukoer

License

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

Site sourced from

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

Attribution

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

All metadata

See all metadata

Al 88, Si 12 (wt%), eutectic alloy

Description

This alloy is of the eutectic composition. From the melt a eutectic is formed between aluminium solid solution and virtually pure silicon. Slow solidification produces a very coarse microstructure. The eutectic comprises large plates of silicon in the aluminium matrix. This microstructure displays poor ductility due to the brittleness of large silicon plates. The microstructure is normally refined through either rapid solidification, which lets the silicon phase assume a fibrous form, or by a process known as modification.It may be noted that primary aluminium dendrites can be seen, although the composition is very close to the eutectic point and an entirely eutectic microstructure might thus have been expected. This effect is a consequence of the strongly skewed nature of the eutectic &qu

Subjects

alloy | aluminium | eutectic | metal | modification | silicon | 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

All metadata

See all metadata

Al 88, Si 12 (wt%), eutectic alloy

Description

This sample is a casting alloy of eutectic composition. From the melt a eutectic is formed between aluminium solid solution and virtually pure silicon. Slow solidification produces a very coarse microstructure. The eutectic comprises large plates of silicon in the aluminium matrix. This microstructure displays poor ductility due to the brittleness of large silicon plates. The microstructure is normally refined through either rapid solidification, which lets the silicon phase assume a fibrous form, or by a process known as modification.It may be noted that primary aluminium dendrites can be seen, although the composition is very close to the eutectic point and an entirely eutectic microstructure might thus have been expected. This effect is a consequence of the strongly skewed nature of th

Subjects

alloy | aluminium | eutectic | metal | modification | silicon | 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

All metadata

See all metadata

Rapid solidification in an atomised droplet

Description

Because of the fine scale of the droplet, heat extraction is very rapid, and large undercoolings are achieved before crystal nucleation can begin. Thus, in this droplet, the solidification front has advanced very rapidly through the droplet from the nucleation point (on the surface at the left of the image). Its velocity is initially so great that no interfacial breakdown is possible. As the front advances, however, latent heat is evolved and this 'recalescence' reduces the rate of solidification to a point where interfacial breakdown is possible and a cellular structure is observed in the last region to solidify (at the right hand side of the image).

Subjects

alloy | atomising | droplet | hypercooled | latent heat | metal | rapid solidification | recalescence | soldidification | 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

All metadata

See all metadata

TALAT Lecture 1255: Metallurgical Background to Alloy Selection and Specifications for Wrought, Cast and Special Applications

Description

This lecture outlines the metallurgical principles of alloy selection and specifications. Basic knowledge of physics and chemistry and some familiarity with TALAT lectures 1201 through 1205 is assumed.

Subjects

aluminium | aluminum | european aluminium association | eaa | talat | training in aluminium application technologies | training | metallurgy | technology | lecture | alloy selection | wrought alloys | cast alloys | aerospace alloys | hot isostatic processing | particulate processing | rapid solidification processing | particulate metal matrix composites | al-li based alloys | 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

http://dspace.jorum.ac.uk/oai/request?verb=ListRecords&metadataPrefix=oai_dc

Attribution

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

All metadata

See all metadata

TALAT Lecture 1401: Aluminium Powder Metallurgy

Description

This lecture outlines the differences between conventionally produced and powder metallurgy aluminium with respect to potential uses; it aims at learning about the various processes to produce and to consolidate alloy powders; it illustrates the extension of the useful property range beyond that of limits of conventionally processed aluminium alloys; it explains the advantages and disadvantages of aluminium produced by powder metallurgy; it shows the potential of aluminium produced by the route of powder metallurgy. Knowledge in metallurgy, materials science, materials engineering is assumed.

Subjects

aluminium | aluminum | european aluminium association | eaa | talat | training in aluminium application technologies | training | metallurgy | technology | lecture | advanced materials | powder fabrication | rapid solidification | caracterisation | powder | precompaction | cold compaction | sintering | hot consolidation | post consolidation | spray forming | p/m 7 xxx alloys | high strength alloys | elevated temperatures | mechanical alloying | high modulus | safety | 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

http://dspace.jorum.ac.uk/oai/request?verb=ListRecords&metadataPrefix=oai_dc

Attribution

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

All metadata

See all metadata

Rapid solidification in an atomised droplet

Description

Because of the fine scale of the droplet, heat extraction is very rapid, and large undercoolings are achieved before crystal nucleation can begin. Thus, in this droplet, the solidification front has advanced very rapidly through the droplet from the nucleation point (on the surface at the left of the image). Its velocity is initially so great that no interfacial breakdown is possible. As the front advances, however, latent heat is evolved and this 'recalescence' reduces the rate of solidification to a point where interfacial breakdown is possible and a cellular structure is observed in the last region to solidify (at the right hand side of the image).

Subjects

alloy | atomising | droplet | hypercooled | latent heat | metal | rapid solidification | recalescence | soldidification | 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

http://dspace.jorum.ac.uk/oai/request?verb=ListRecords&metadataPrefix=oai_dc

Attribution

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

All metadata

See all metadata