Hot Rolling and Ageing Effect on the Pseudoelasticity Behaviour of Ti-Rich TiNi Shape Memory AlloyReportar como inadecuado




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This paper presents the findings of an experimental study of how ageing temperature affects thepseudoelasticity PE and its phases of Shape Memory Alloy SMA. These have been examinedby means of tensile testing machine and X-ray diffraction XRD. By increasing the ageingtemperature constant ageing time from 350oC to 550oC critical stress for martensite formationand psuedo-elastic elongation increased. However, specimen aged at 650oC showed a decreasein the critical stress for martensite formation and psuedo-elastic elongation. After second andthird sequence of loading and unloading, the critical stress shifted towards higher side wasobserved. The XRD measurement revealed that phases present in the matrix drastically changeswith ageing temperatures. Transformation was taking place in two-way transformation, i.e.,during heating martensite B19- transformed to austenite B2 while cooling the austenite B2 transformed back to martensite B19- .

KEYWORDS

Pseudoelasticity; S M A; Critical stress; Elongation

Cite this paper

N. S., V. Desai, S. Basavarajappa, K. Arun and S. Yadav -Hot Rolling and Ageing Effect on the Pseudoelasticity Behaviour of Ti-Rich TiNi Shape Memory Alloy,- Journal of Minerals and Materials Characterization and Engineering, Vol. 9 No. 4, 2010, pp. 343-351. doi: 10.4236-jmmce.2010.94025.





Autor: Narendranath. S., Vijay Desai, S. Basavarajappa, K.V. Arun, S. Manjunath Yadav

Fuente: http://www.scirp.org/



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