X-ray microbeam measurements of long-range internal stresses in commercial-purity aluminum processed by multiple passes of equal-channel angular pressing

SCRIPTA MATERIALIA

卷:93

Article

Phan, Thien Q.^1,2  Lee, I-Fang^1,2  Levine, Lyle E.³  Tischler, Jonathan Z.⁴  Huang, Yi⁵  Fox, Alan G.⁶  Langdon, Terence G.^1,2,5  Kassner, Michael E.^1,2 

[1] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA

[2] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA

[3] NIST, Mat Measurement Lab, Gaithersburg, MD 20899 USA

[4] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[5] Univ Southampton, Fac Engn & Environm, Mat Res Grp, Southampton SO17 1BT, Hants, England

[6] Asian Univ, Dept Mech Engn, Banglamung 20260, Chon Buri, Thailand

关键词: X-ray diffraction;    Aluminum;    Equal-channel angular pressing;    Long-range internal stresses;    Severe plastic deformation;   

DOI  :  10.1016/j.scriptamat.2014.09.001

来源: Elsevier

【 摘 要 】

X-ray microbeam diffraction was used to measure long-range internal stresses (LRISs) in the grain/subgrain interiors of commercial-purity aluminum processed by equal-channel angular pressing for up to eight passes. The LRIS values at +4.9 degrees off the axial (pressing) direction show only a slight increase with increasing numbers of passes. The normalized stress remains approximately constant at similar to 0.10 of the flow stress. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free