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CYCLIC DEFORMATION BEHAVIOR OF A COPPER BICRYSTAL WITH A PERPENDICULAR GRAIN BOUNDARY |
ZHANG Zhefeng; WANG Zhongguang; SU Huihe(State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110015)Correspondent: ZHANG Zhefeng Tel: (024)23843531-55225; Fax: (024)23891320 |
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Cite this article:
ZHANG Zhefeng; WANG Zhongguang; SU Huihe(State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110015)Correspondent: ZHANG Zhefeng Tel: (024)23843531-55225; Fax: (024)23891320. CYCLIC DEFORMATION BEHAVIOR OF A COPPER BICRYSTAL WITH A PERPENDICULAR GRAIN BOUNDARY. Acta Metall Sin, 1998, 34(8): 841-846.
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Abstract Based on the observations of slip patterns and saturation dislocation patterns,the cyclic stress-strain response was investigated by cyclically loading a copper bicrystal with a grain boundary perpendicular to the stress axis under constant plastic strain control. The results showed that the cyclic stress-strain (CSS) curve displayed a double plateau region in the plastic strain range of 1.80 × 10-4 - 2.56 × 10-3. The plateau saturation axial stresses were 62 - 64 MPa and 70 - 71 MPa respectively at axial plastic strain range of 1.80× 10-4- 1.35× 10-3 and 2.04× 10-3 - 2.56× 10-3. The effects of component crystal orientation on the slip characteristics, saturation dislocation patterns and CSS curve were discussed.
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Received: 18 August 1998
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