Evolution of plasticity, strain-rate sensitivity and the underlying deformation mechanism in Zn-22% Al during high-pressure torsion

Choi, In-Chul; Kim, Yong-Jae; Ahn, Byungmin; Kawasaki, Megumi; Langdon, Terence G.; Jang, Jae-il

doi:10.1016/j.scriptamat.2013.12.003

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Evolution of plasticity, strain-rate sensitivity and the underlying deformation mechanism in Zn-22% Al during high-pressure torsion

Choi, In-Chul;
Kim, Yong-Jae;
Ahn, Byungmin;
Kawasaki, Megumi;
Langdon, Terence G.;
... Jang, Jae-il

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54

초록

This study explores the evolution of plasticity, strain-rate sensitivity and the underlying deformation mechanism of a Zn-22% Al eutectoid alloy during high-pressure torsion processing. The experiments reveal an optimal torsional straining condition for achieving the largest plasticity; beyond this condition the strain-rate sensitivity decreases and activation volume increases. The results are discussed in terms of changes in the microstructure and the underlying deformation mechanism.

키워드

Zn-Al alloy; High-pressure torsion; Strain-rate sensitivity; Deformation mechanism; Nanoindentation; ULTRAFINE-GRAINED ALUMINUM; NANOINDENTATION; HARDNESS; ROOM; SUPERPLASTICITY; BEHAVIOR; CREEP

제목: Evolution of plasticity, strain-rate sensitivity and the underlying deformation mechanism in Zn-22% Al during high-pressure torsion

저자: Choi, In-Chul; Kim, Yong-Jae; Ahn, Byungmin; Kawasaki, Megumi; Langdon, Terence G.; Jang, Jae-il

DOI: 10.1016/j.scriptamat.2013.12.003

발행일: 2014-03

유형: Article

저널명: Scripta Materialia

권: 75

페이지: 102 ~ 105