Journal
MATERIALS LETTERS
Volume 65, Issue 3, Pages 464-466Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2010.10.026
Keywords
Shape memory materials; Phase transformation; Rate-dependent indentation depth
Funding
- Hong Kong Research Grants Council [620109]
Ask authors/readers for more resources
We examined the effect of loading rate on maximum nanoindentation depth for nano-grained superelastic NiTi shape memory alloy during stress-induced phase transformation. The depth decreases significantly with increasing loading rate. It is argued that the observed rate dependency is attributed to the release and transfer of latent heat during indentation and the temperature dependence of the material's transition stress. Dimensional analysis further shows that the depth is mainly governed by the normalized average stress in the phase transition zone and the ratio of heat conduction time over loading time. Experimental results support the rationale. (C) 2010 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available