Theory of aging phenomena in shape-memory alloys

Tohru Okuzono, Yoshihiro Yamazaki, Yoshihiro Yamazaki

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We formulate a theory for the aging phenomena in AuCd-type shape-memory alloys. The kinetics of the martensitic transformation is represented in terms of the local strain as the order-parameter field. We introduce a secondary slow variable coupled with the order parameter. This theory is an extension of the previous paper by one of the authors, where the secondary variable was assumed to be a nonconserved quantity. In the present paper, we explore the consequence that the secondary variable is conserved. It is shown that the conserved slow variable is more favorable to account for martensite stabilization after aging observed experimentally. In order to study the rubberlike elasticity, the stress-strain relation is also derived both by the direct simulations of the set of kinetic equations and by the interface (twin boundary) dynamics. We propose experiments to elucidate whether the slow variable is conserved or not.

Original languageEnglish
Article number054106
Pages (from-to)541061-5410612
Number of pages4869552
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number5
Publication statusPublished - 2003 Feb 1
Externally publishedYes

Fingerprint

shape memory alloys
Shape memory effect
Aging of materials
Kinetics
Martensitic transformations
Martensite
Elasticity
Stabilization
martensitic transformation
martensite
kinetic equations
Experiments
elastic properties
stabilization
kinetics
simulation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Theory of aging phenomena in shape-memory alloys. / Okuzono, Tohru; Yamazaki, Yoshihiro; Yamazaki, Yoshihiro.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 67, No. 5, 054106, 01.02.2003, p. 541061-5410612.

Research output: Contribution to journalArticle

Okuzono, Tohru ; Yamazaki, Yoshihiro ; Yamazaki, Yoshihiro. / Theory of aging phenomena in shape-memory alloys. In: Physical Review B - Condensed Matter and Materials Physics. 2003 ; Vol. 67, No. 5. pp. 541061-5410612.
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