Nanoindentation characterized initial creep behavior of a high-entropy-based alloy CoFeNi
Journal article, 2014
A crossover behavior in the initial creep stage during nanoindentation with a constant load for a high-entropy-based alloy CoFeNi is found. The holding time and stress in the indentation tests are evaluated to reveal the intrinsic mechanism of the crossover point. It indicated that the initial creep behavior is dominated by the strain-hardening at the beginning and then transit into the dislocation migration induced viscous stage. The transition presents the crossover, where the strain hardening effect predominates in a very short initial period while the viscous stage accounts for most of the initial creep stage with a time-dependent strain rate.
Author
Z. J. Wang
Northwestern Polytechnical University
City University of Hong Kong
Sheng Guo
Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering
Q. Wang
City University of Hong Kong
Z. Y. Liu
City University of Hong Kong
J. C. Wang
Northwestern Polytechnical University
Y. Yang
City University of Hong Kong
C. T. Liu
City University of Hong Kong
Intermetallics
0966-9795 (ISSN)
Vol. 53 183-186Subject Categories
Materials Engineering
DOI
10.1016/j.intermet.2014.05.007