Development of residual stresses in shape memory alloys under thermomechanical cycle loadings

Teodor M. Breczko; Krzysztof Kus

doi:10.1117/12.456283

18 February 2002 Development of residual stresses in shape memory alloys under thermomechanical cycle loadings

Teodor M. Breczko, Krzysztof Kus

Proceedings Volume 4627, Fifth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering; (2002) https://doi.org/10.1117/12.456283
Event: Fifth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering, 2001, St. Petersburg, Russian Federation

Abstract

In this paper the experimental measurement results of the residual stresses in shape memory alloys (SMA's) are discussed. The experimental data are based on the investigation of the changes in root-mean-square (RMS) micro-strains and size of coherent blocks. The study was performed on the samples of Ni_50,6Ti_49,4 alloy that were subjected to cyclic thermo-mechanical loading. To induce reversible martensite transformations in the material, the external loading was used with subsequent data recording using x-ray method. The results of experimental measurements of the RMS micro-strains and coherent block sizes in austenite phase are presented. Based on the experimental data the computer simulation results are presented. Experimental and theoretical results have shown that the changes of structural parameters can be helpful for evaluate of functional characteristics of NiTi alloys.

Citation Download Citation

Teodor M. Breczko and Krzysztof Kus "Development of residual stresses in shape memory alloys under thermomechanical cycle loadings", Proc. SPIE 4627, Fifth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering, (18 February 2002); https://doi.org/10.1117/12.456283

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