Factors influencing ductility in ultrafine-grained metals processed by equal-channel angular pressing
Figueiredo, Roberto B., Duan, Zhi Chao, Kawasaki, Megumi and Langdon, Terence G. (2010) Factors influencing ductility in ultrafine-grained metals processed by equal-channel angular pressing. Materials Science Forum, 633-634, 341-352. (doi:10.4028/www.scientific.net/MSF.633-634.341).
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The processing of bulk metals through the application of severe plastic deformation provides an opportunity for achieving exceptional grain refinement to the submicrometer or even the nanometer range. This paper examines the characteristics of metals processed by equal-channel angular pressing with special emphasis on the levels of ductility that may be attained. It is shown that the amount of ductility is dependent not only upon the composition of the material but also, and to a major extent, upon the testing temperature. Specifically, the ductilities are often low at ambient temperatures where the strength of the as-processed material is relatively high but, by contrast, exceptionally high superplastic ductilities may be achieved over short ranges of strain rate when testing at elevated temperatures
|Keywords:||aluminum alloy, ductility, equal channel angular pressing (ECAP), magnesium alloy, superplasticity|
|Subjects:||T Technology > TN Mining engineering. Metallurgy|
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
|Date Deposited:||01 Feb 2010|
|Last Modified:||02 Mar 2012 13:56|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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