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Applied stress controls the production of nano-twins in coarse-grained metals

Title
Applied stress controls the production of nano-twins in coarse-grained metals
Author
Megumi Kawasaki
Keywords
HIGH-PRESSURE TORSION; NANOCRYSTALLINE AL; STRAIN-RATE; DEFORMATION MECHANISM; COPPER; CU; STRENGTH; ALLOY; STEEL; STACKING-FAULT ENERGY
Issue Date
2012-12
Publisher
AMERICAN INSTITUTE OF PHYSICS
Citation
Applied Physics Letters, 2012, 101(23), P.231903
Abstract
We present evidence that the level of the applied stress plays a critical role in deformation twinning in face-centred cubic alloys. While conventional cold rolling of a face-centred cubic structure produces a microstructure with a high-density of extended dislocations, increasing the applied stress using high-pressure torsion gives a nano-twinned coarse-grained structure. This suggests the existence of a critical stress for deformation twinning which thereby delineates an approach for the production of nano-twinned microstructures in coarse-grained materials with superior mechanical properties. (C) 2012 American Institute of Physics
URI
http://aip.scitation.org.access.hanyang.ac.kr/doi/10.1063/1.4769216http://hdl.handle.net/20.500.11754/48577
ISSN
0003-6951
DOI
10.1063/1.4769216
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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