On the Relationship between Pseudoelasticity and Texture Evolution in Ti-26Nb-0.5Si Alloy

Abstract:

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Texture and cyclic tensile behavior of Ti-26Nb-0.5Si (denoted as atomic percent) alloys in which the microstructures were varied by quenching, cold rolling and recrystallization heat treatment were investigated in order to understand the relationship between pseudoelastic behavior and texture formation. Three phase mixtures consisting of bcc-structured β phase, orthorhombic structured α" phase and hcp-structured intermediate ω phase were characterized to display the constituent phases. The volume fraction of constituent phases was found to be insensitive to the given materials processing. Two-stage yielding, one at low stress with low strain hardening rate and the other one at high stress with high strain hardening rate, appeared to exhibit a characteristic flow behavior in the present alloys. It is revealed that stress-induced martensite transformation resulting in two-stage yielding was closely associated with pseudoelasticity. On the basis of texture analyses, we have suggested that pseudoelasticity of the present alloys is hindered by the development of {001}<110> rotated cube component.

Info:

Periodical:

Materials Science Forum (Volumes 558-559)

Edited by:

S.-J.L. Kang, M.Y. Huh, N.M. Hwang, H. Homma, K. Ushioda and Y. Ikuhara

Pages:

1407-1411

DOI:

10.4028/www.scientific.net/MSF.558-559.1407

Citation:

W. Y. Kim and H. S. Kim, "On the Relationship between Pseudoelasticity and Texture Evolution in Ti-26Nb-0.5Si Alloy", Materials Science Forum, Vols. 558-559, pp. 1407-1411, 2007

Online since:

October 2007

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$35.00

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