Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 645, Issue -, Pages 280-285Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2015.08.037
Keywords
Gradient structure; Strength; Ductility; Synergetic strengthening
Categories
Funding
- National Natural Science Foundation of China [50874056, 51361017]
- US Army Research Office [W911 NF-12-1-0009]
- China 1000Plan program
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This paper reports the influence of gradient structure volume fraction on the tensile mechanical behaviors of pure copper processed by surface mechanical attrition treatment at cryogenic temperature. Superior combinations of tensile strength and ductility are observed in a certain volume fraction, in which strain hardening uprising after yielding is also observed. The gradient structure produces a synergetic strengthening and extra work hardening. These findings suggest the existence of an optimum volume fraction of gradient structure for the best mechanical properties. (C) 2015 Elsevier B.V. All rights reserved.
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