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Strain Hardening by High Density SISFs During Low Cycle Fatigue in Ni3(Al,Zr) Single Crystal

Published online by Cambridge University Press:  22 February 2011

Yuefeng Gu ,
Yi Liu ,
Jianting Guo  and
Dongliang Lin
Yuefeng Gu
Affiliation:
Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200030, P.R.China.
Yi Liu
Affiliation:
Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200030, P.R.China.
Jianting Guo
Affiliation:
Institute of Metal Research, Academia Sinica, Shenyang, 110015, P.R.China.
Dongliang Lin
Affiliation:
Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200030, P.R.China.
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Abstract

Stress response and its correlation with dislocation substructures in Ni3(Al,Zr) single crystal fatigued at room temperature have been studied. Cyclic strain hardening was found to be asymmetric and increased with increasing applied cyclic strain. Transmission Electron Microscope (TEM) observation showed that there are a profusion superlattic intrinsic stacking faults (SISFs) in fatigued Ni3(Al,Zr) single crystal samples. The cyclic strain hardening and stress asymmetry are explained by the movement of the SISF.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 303
Copyright
Copyright © Materials Research Society 1995

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