Equal-channel angular pressing as a production tool for superplastic materials
Horita, Z., Lee, S., Ota, S., Neishi, K. and Langdon, T.G. (2001) Equal-channel angular pressing as a production tool for superplastic materials. In, Chandra, Namas (ed.) Superplasticity in Advanced Materials - ICSAM-2000. International Conference on Superplasticity in Advanced Materials (ICSAM-2000) Switzerland, Trans Tech, 471-476. (Materials Science Forum 357-359).
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Equal-channel angular pressing (ECAP) was applied for grain refinement of Al-3%Mg0.2%Fe and Al-3%Mg-0.2%Ti alloys and also for a commercial Al 2024 alloy. The grain sizes of the alloys were reduced to similar to0.3 mum. The stability of the fine-grained structures were examined and it was found that the small grains remained stable up to the temperatures of similar to 250 degreesC for the Al-3%Mg-0.2%Fe and Al-3%Mg-0.2%Ti alloys and similar to 400 degreesC for the Al 2024 alloy. Tensile tests revealed maximum elongations of similar to 370% and similar to 180% in the Al-3%Mg0.2%Fe and Al-3%Mg-0.2%Ti alloys, respectively, at a temperature of 250 degreesC with an initial strain rate of 3.3x10(-4) s(-1). There is some evidence for low temperature superplasticity in the Al-3%Mg-0.2%Fe alloy. A maximum elongation of similar to 460% was attained in the Al 2024 alloy at 400 degreesC with an initial strain rate of 10(-3) s(-1). It is demonstrated that the ECAP can be effective in producing superplastic materials.
|Item Type:||Book Section|
|Additional Information:||Series ISSN 0255-5476|
|Subjects:||T Technology > TN Mining engineering. Metallurgy|
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences
|Date Deposited:||23 Mar 2006|
|Last Modified:||27 Mar 2014 18:12|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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