Nanoscale variation in energy dissipation in austenitic shape memory alloys in ultimate loading cycles Amini, Abbas, Yang, Chunhui, Cheng, Chun, Naebe, Minoo and Xiang, Yang 2015, Nanoscale variation in energy dissipation in austenitic shape memory alloys in ultimate loading cycles, Journal of intelligent material systems and structures, vol. 26, no. 17, pp. 2411-2417, doi: 10.1177/1045389X14560365. Attached Files Name Description MIMEType Size Downloads Title Nanoscale variation in energy dissipation in austenitic shape memory alloys in ultimate loading cycles Author(s) Amini, Abbas Yang, Chunhui Cheng, Chun Naebe, Minoo orcid.org/0000-0002-0607-6327 Xiang, Yang Journal name Journal of intelligent material systems and structures Volume number 26 Issue number 17 Start page 2411 End page 2417 Total pages 7 Publisher Sage Publications Place of publication London, Eng. Publication date 2015-11 ISSN 1045-389X 1530-8138 Keyword(s) Science & Technology Technology Materials Science, Multidisciplinary Materials Science shape memory alloys dynamic and smart systems NiTi phase transition nanoindentation PHASE-TRANSFORMATION EVOLUTION HARDNESS DEPTH MODEL Summary Wavy behaviours of hysteresis energy variation in nanoscale bulk of thermomechanical austenitic NiTi shape memory alloy are reported in ultimate nanoindentation loading cycles. One sharp and two spherical tips were used while two loading-unloading rates were applied. For comparison, another austenitic copper-based shape memory alloy, CuAlNi shape memory alloy, and a metal with no phase transition, elastoplastic Cu, were investigated. In shape memory alloys, the hysteresis energy variation ultimately undergoes a linear decrease with internal wavy fluctuations and no stabilisation was observed. The internal energy fluctuation in these alloys was found dissimilar depending on the loading-unloading rate and the indentation tip geometry. In contrast, there was an absence of both overall and internal variations in hysteresis energy for Cu after the second loading cycle. The underlying physics of these variations is discussed and found to be attributed to both the created dislocations and ratcheting thermal-mechanical behaviour of the phase-transformed volume in shape memory alloys. Language eng DOI 10.1177/1045389X14560365 Field of Research 099999 Engineering not elsewhere classified 09 Engineering Socio Economic Objective 970109 Expanding Knowledge in Engineering HERDC Research category C1 Refereed article in a scholarly journal ERA Research output type C Journal article Copyright notice ©2015, Sage Persistent URL http://hdl.handle.net/10536/DRO/DU:30082296 Document type: Journal Article Collections: Institute for Frontier Materials GTP Research Related Links Link Description Connect to Elements publication management system Go to link with your DU access privileges   Connect to published version Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Fri, 18 Mar 2016, 08:36:59 EST Fri, 18 Mar 2016, 08:37:42 EST Sat, 19 Mar 2016, 04:16:06 EST Sat, 19 Mar 2016, 05:10:20 EST Wed, 04 May 2016, 14:47:00 EST Thu, 01 Sep 2016, 11:09:15 EST Filtered Full Citation counts:   Cited 3 times in TR Web of Science Cited 3 times in Scopus Search Google Scholar Access Statistics: 489 Abstract Views, 3 File Downloads  -  Detailed Statistics Created: Fri, 18 Mar 2016, 08:37:42 EST