Enhancement of strain-rate sensitivity and shear yield strength of a magnesium alloy processed by high-pressure torsion

Choi, In-Chul; Lee, Dong-Hyun; Ahn, Byungmin; Durst, Karsten; Kawasaki, Megumi; Langdon, Terence G.; Jang, Jae-il

doi:10.1016/j.scriptamat.2014.09.014

상세 보기

Enhancement of strain-rate sensitivity and shear yield strength of a magnesium alloy processed by high-pressure torsion

Choi, In-Chul;
Lee, Dong-Hyun;
Ahn, Byungmin;
Durst, Karsten;
Kawasaki, Megumi;
... Jang, Jae-il;
외 1명

Citations

WEB OF SCIENCE

57

Citations

SCOPUS

58

초록

A Mg-Zn-Zr alloy was processed by high-pressure torsion for up to 2 turns at room temperature to produce significant grain refinement together with enhanced plasticity and strength. Measurements were performed to determine the strain-rate sensitivity, shear yield strength and activation volume as a function of the processing conditions. The results suggest there is a significant contribution from grain boundary sliding to the flow process and the onset of plasticity is associated with heterogeneous dislocation nucleation.

키워드

Grain boundary sliding; High-pressure torsion; Magnesium alloy; Strain-rate sensitivity; Yielding; INCIPIENT PLASTICITY; GRAIN-REFINEMENT; RATE DEPENDENCE; NANOINDENTATION; BEHAVIOR; HARDNESS; FLOW; NUCLEATION; PRINCIPLES; EVOLUTION

제목: Enhancement of strain-rate sensitivity and shear yield strength of a magnesium alloy processed by high-pressure torsion

저자: Choi, In-Chul; Lee, Dong-Hyun; Ahn, Byungmin; Durst, Karsten; Kawasaki, Megumi; Langdon, Terence G.; Jang, Jae-il

DOI: 10.1016/j.scriptamat.2014.09.014

발행일: 2015-01

유형: Article

저널명: Scripta Materialia

권: 94

페이지: 44 ~ 47