A cyclic integrated microstructural-mechanical model for a shape memory alloy

被引：9
|
作者：
Bellini, C. [1 ]
Berto, F. [2 ]
Di Cocco, V. [1 ]
Iacoviello, F. [1 ]
机构：
[1] Univ Cassino & Lazio Meridionale, DICeM, Via G Biasio 43, I-03043 Cassino, FR, Italy
[2] NTNU Norwegian Univ Sci & Technol, Richard Birkelands Vei 2b, N-7491 Trondheim, Norway
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 153卷
关键词：
Shape memory alloys; Cyclic properties; Tensile loading; FATIGUE-CRACK PROPAGATION; SUPERELASTIC NITI; BEHAVIOR; STRESS; TRANSFORMATION; EVOLUTION; STRAIN;
D O I：
10.1016/j.ijfatigue.2021.106473
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Shape memory alloys are able to recover the initial shape even after a large deformation. The memory property is due to the ability to change the microstructure under a variation of the stress state or the temperature. The stress-strain curve is characterized by the presence of a stage where the slope of the curve sharply decreases and the initial microstructure transforms into a new one. In this work, an integrated microstructural-mechanical model is proposed for the equiatomic NiTi shape memory alloy, that is suitable to predict the cyclic behaviour of a pseudoelastic shape memory alloy starting from the microstructure composition.
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页数：8
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