Phase transformation evolution in NiTi shape memory alloy under cyclic nanoindentation loadings at dissimilar rates

Amini, Abbas, Cheng, Chun, Kan, Qianhua, Naebe, Minoo and Song, Haisheng 2013, Phase transformation evolution in NiTi shape memory alloy under cyclic nanoindentation loadings at dissimilar rates, Scientific reports, vol. 3, no. Article ID : 3412, pp. 1-7.

Attached Files
Name Description MIMEType Size Downloads

Title Phase transformation evolution in NiTi shape memory alloy under cyclic nanoindentation loadings at dissimilar rates
Author(s) Amini, Abbas
Cheng, Chun
Kan, Qianhua
Naebe, Minoo
Song, Haisheng
Journal name Scientific reports
Volume number 3
Issue number Article ID : 3412
Start page 1
End page 7
Total pages 7
Publisher Nature Publishing Group
Place of publication London, England
Publication date 2013-12-13
ISSN 2045-2322
Summary Hysteresis energy decreased significantly as nanocrystalline NiTi shape memory alloy was under triangular cyclic nanoindentation loadings at high rate. Jagged curves evidenced discrete stress relaxations. With a large recovery state of maximum deformation in each cycle, this behavior concluded in several nucleation sites of phase transformation in stressed bulk. Additionally, the higher initial propagation velocity of interface and thermal activation volume, and higher levels of phase transition stress in subsequent cycles explained the monotonic decreasing trend of dissipated energy. In contrast, the dissipated energy showed an opposite increasing trend during triangular cyclic loadings at a low rate and 60âsec holding time after each unloading stage. Due to the isothermal loading rate and the holding time, a major part of the released latent heat was transferred during the cyclic loading resulting in an unchanged phase transition stress. This fact with the reorientation phenomenon explained the monotonic increasing trend of hysteresis energy.
Language eng
Field of Research 109999 Technology not elsewhere classified
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30060871

Document type: Journal Article
Collection: Institute for Frontier Materials
Connect to link resolver
 
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Versions
Version Filter Type
Access Statistics: 36 Abstract Views, 2 File Downloads  -  Detailed Statistics
Created: Fri, 21 Feb 2014, 08:31:25 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.