Critical Grain Size for Change in Deformation Behavior in Ultrafine Grained Al-Mg-Sc Alloy
Experimental evaluation of critical grain size for the change in deformation behavior from strain hardening to strain softening in ultrafine grained (UFG) Al-Mg-Sc was carried out. UFG alloy was processed using friction stir processing (FSP). Two different average grain sizes were obtained by changing the FSP parameters. UFG alloy with grain size larger than the subgrain size showed sufficient strain hardening during tensile testing, whereas smaller grain size material exhibited strain softening.
N. Kumar et al., "Critical Grain Size for Change in Deformation Behavior in Ultrafine Grained Al-Mg-Sc Alloy," Scripta Materialia, Elsevier, Mar 2011.
The definitive version is available at http://dx.doi.org/10.1016/j.scriptamat.2010.11.051
Mechanical and Aerospace Engineering
Materials Science and Engineering
Keywords and Phrases
Critical Grain Size; Friction Stir Processing; Strain Softening; Ultrafine Grains
Article - Journal
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