Enhancement of strain-rate sensitivity and shear yield strength of a magnesium alloy processed by high-pressure torsion
- Authors
- Choi, In-Chul; Lee, Dong-Hyun; Ahn, Byungmin; Durst, Karsten; Kawasaki, Megumi; Langdon, Terence G.; Jang, Jae-il
- Issue Date
- Jan-2015
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Grain boundary sliding; High-pressure torsion; Magnesium alloy; Strain-rate sensitivity; Yielding
- Citation
- SCRIPTA MATERIALIA, v.94, pp.44 - 47
- Indexed
- SCIE
SCOPUS
- Journal Title
- SCRIPTA MATERIALIA
- Volume
- 94
- Start Page
- 44
- End Page
- 47
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/158100
- DOI
- 10.1016/j.scriptamat.2014.09.014
- ISSN
- 1359-6462
- Abstract
- 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.
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