Critical Grain Size for Change in Deformation Behavior in Ultrafine Grained Al-Mg-Sc Alloy

Author

Nishant Kumar, Missouri University of Science and TechnologyFollow
Rajiv S. Mishra, Missouri University of Science and TechnologyFollow
C. S. Huskamp
Krishnan K. Sankaran

Abstract

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.

Recommended Citation

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 https://doi.org/10.1016/j.scriptamat.2010.11.051

Department(s)

Mechanical and Aerospace Engineering

Second Department

Materials Science and Engineering

Keywords and Phrases

Critical Grain Size; Friction Stir Processing; Strain Softening; Ultrafine Grains

International Standard Serial Number (ISSN)

1359-6462

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2011 Elsevier, All rights reserved.

Publication Date

01 Mar 2011