STRESS-STRAIN HYSTERESIS OF Cu-Zn-Al POLYCRYSTALLINE SMAs─Ⅱ: EXPERIMENTS AND NUMERICAL SIMULATIONS  

作　　者：Y. Chen Y. Huo X. Zu M. Tu and Y. Gou ( Department of Metal Materials, Sichuan University, Chengdu 610065, China)( Department of Metal Materials, Sichuan University, Chengdu 610065, China)( Department of Metal Materials, Sichuan University, Chengdu 610 

出　　处：《Acta Metallurgica Sinica(English Letters)》1999年第3期211-215,共5页金属学报（英文版）

摘　　要：In this paper, the stress-strain bys torests at various temperatures was investigated experimentally for Cu-Zn-Al polycrystalline shape memory alloys (SMAs). Numerical simulations of the pseudoelastic hysteresis were performed based on a model, which had been proposed by the authors. As observed in the experiments, the shapes of the outer loops of the hysteresis varied strongly from specimen to specimen, which have the same chemical composition but different heat-treatment. Rather complicated inner hysteretic curves were obtained at testing temperatures higher than Af. The numerical simulations of the stress-strain hysteresis and the inner hysteretic curves agreed quite well with the experimental results.In this paper, the stress-strain bys torests at various temperatures was investigated experimentally for Cu-Zn-Al polycrystalline shape memory alloys (SMAs). Numerical simulations of the pseudoelastic hysteresis were performed based on a model, which had been proposed by the authors. As observed in the experiments, the shapes of the outer loops of the hysteresis varied strongly from specimen to specimen, which have the same chemical composition but different heat-treatment. Rather complicated inner hysteretic curves were obtained at testing temperatures higher than Af. The numerical simulations of the stress-strain hysteresis and the inner hysteretic curves agreed quite well with the experimental results.

关 键 词：shape memory alloys (SMAs) hystcresls inner hysteretic Beavior PSEUDOELASTICITY numerical simulations 

分 类 号：TG146[一般工业技术—材料科学与工程]