Nanostructured Shape Memory TiNi Alloy Processed by Severe Electroplastic Deformation

Abstract:

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Electropulse current effect during cold rolling on deformability, nanostructure formation and mechanical behavior in coarse-grained (CG) and ultrafine-grained (UFG) TiNi alloys enriched by nickel is investigated. The UFG sample subjected to cold rolling with current has a fracture strain (е = 1.91) which is higher than that without a current (е = 0.59). As a result of cold rolling with a current and a subsequent annealing at 400-450 °C, nanostructure is formed in both alloys, which leads to a significant enhancement of yield and ultimate stresses. It has been shown that the efficiency of electroplastic rolling depends on the purity of the alloys.

Info:

Periodical:

Materials Science Forum (Volumes 584-586)

Edited by:

Yuri Estrin and Hans Jürgen Maier

Pages:

507-512

DOI:

10.4028/www.scientific.net/MSF.584-586.507

Citation:

V. V. Stolyarov "Nanostructured Shape Memory TiNi Alloy Processed by Severe Electroplastic Deformation", Materials Science Forum, Vols. 584-586, pp. 507-512, 2008

Online since:

June 2008

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$35.00

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