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Spherical indentation for determining the phase transition properties of shape memory alloys

Published online by Cambridge University Press:  31 January 2011

Linmao Qian ,
Shuang Zhang ,
Dongyang Li  and
Zhongrong Zhou
Linmao Qian*
Affiliation:
Tribology Research Institute, National Traction Power Laboratory, Southwest Jiaotong University, Chengdu 610031, Sichuan Province, People’s Republic of China
Shuang Zhang
Affiliation:
Tribology Research Institute, National Traction Power Laboratory, Southwest Jiaotong University, Chengdu 610031, Sichuan Province, People’s Republic of China
Dongyang Li
Affiliation:
Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 2G6
Zhongrong Zhou
Affiliation:
Tribology Research Institute, National Traction Power Laboratory, Southwest Jiaotong University, Chengdu 610031, Sichuan Province, People’s Republic of China
*
a) Address all correspondence to this author. e-mail: linmao@swjtu.edu.cn
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Abstract

A spherical indentation method was developed to characterize the phase transition behaviors of shape memory alloys (SMAs). Based on deformation analysis, the measured indentation force-depth curves of SMAs can be converted to their nominal stress-strain curves. The predicted elastic modulus and phase transition stress of SMAs from spherical indentation agree well with those directly measured from tensile tests. This approach should be especially useful for characterizing the phase transition properties of SMA materials of small size or thin films.

Keywords

NanoindentationPhase transformationStress/strain relationship
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 3 , March 2009 , pp. 1082 - 1086
Copyright
Copyright © Materials Research Society 2009

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