標題: The evolution of compatible microstructures in shape memory alloys
作者: Tsou, Nien-Ti
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Shape memory alloys;compatibility;microstructures;superelasticity
公開日期: 1-一月-2014
摘要: Shape memory alloys (SMAs) have been extensively used in sensors and actuators. Their behavior is dominated by the microstructures. Observations show that martensite twins usually form laminated patterns with interfaces that satisfy the compatibility equation to minimize the total energy. However, due to high nonlinearity of the material, the relationship between the overall response and microstructure has not yet been revealed. In this study, we identify the set of possible twin structures and the paths along which the microstructure evolves continuously between austenite and martensite phases under loads. The variational principle is used to capture the dissipative nature of interface motion in microstructures when phase transformation occurs. The model is applied to study superelasticity effect in Cu-Al-Ni single crystals. Many subtle features are explained. (C) 2014 Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.
URI: http://dx.doi.org/10.1016/j.proeng.2014.06.382
http://hdl.handle.net/11536/125055
ISSN: 1877-7058
DOI: 10.1016/j.proeng.2014.06.382
期刊: 37TH NATIONAL CONFERENCE ON THEORETICAL AND APPLIED MECHANICS (37TH NCTAM 2013) & THE 1ST INTERNATIONAL CONFERENCE ON MECHANICS (1ST ICM)
Volume: 79
起始頁: 579
結束頁: 582
顯示於類別:會議論文