Localized and diffuse thermoinduced phase transformation in 1-D shape memory alloys

Citation
A. Bekker et al., Localized and diffuse thermoinduced phase transformation in 1-D shape memory alloys, J IN MAT SY, 9(5), 1998, pp. 355-365
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science & Engineering
Journal title
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
ISSN journal
1045-389X → ACNP
Volume
9
Issue
5
Year of publication
1998
Pages
355 - 365
Database
ISI
SICI code
1045-389X(199805)9:5<355:LADTPT>2.0.ZU;2-4
Abstract
In this paper we further explore the thermoinduced shape memory alloy trans formation using a model developed in a previous publication. The problem in vestigated in detail is that of a semi-infinite SMA rod under uniaxial tens ion, subjected to boundary cooling or heating. The boundary conditions lead to propagation of a martensite/austenite transformation along the rod star ting at the cooled/heated boundary. The mathematical model for the problem is formulated via the energy equation coupled with a one-dimensional consti tutive law and phase diagram based kinetics and solved numerically. In this paper, the previous solution technique for boundary cooling is extended to the case of boundary heating, nonuniform initial states are considered, an d particular attention is focused on the transition two-phase zone of the t ransformation. It is shown that even though the problem is formulated using a phase diagram with finite width transformation regions, a localized inte rface type solution may be obtained. The results have important implication s for applications and modeling of SMA behavior.