Journal ArticleDOI
On the characterization and origin of the dislocations associated with the two way memory effect in CuZnAl thermoelastic alloys-I. Quantitative analysis of the dislocations
D. Ríos-Jara,G. Guénin +1 more
TLDR
In this article, the Burgers vector of dislocations formed during the thermo-mechanical treatment needed to induce the two way memory effect in a Cu-Zn-Al alloy was determined.About:
This article is published in Acta Metallurgica.The article was published on 1987-01-01. It has received 65 citations till now. The article focuses on the topics: Partial dislocations & Burgers vector.read more
Citations
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Journal ArticleDOI
On the multiplication of dislocations during martensitic transformations in NiTi shape memory alloys
TL;DR: In this article, the authors used in situ and post-mortem diffraction contrast transmission electron microscopy (TEM) to study the multiplication of dislocations during a thermal martensitic forward and reverse transformation in a NiTi shape memory alloy single crystal.
Journal ArticleDOI
Thermomechanical modeling of polycrystalline SMAs under cyclic loading, Part I: theoretical derivations
Zhonghe Bo,Dimitris C. Lagoudas +1 more
TL;DR: In this article, a generic Gibbs free energy for polycrystalline Shape Memory Alloys (SMAs) is obtained by forming the increments of both elastic potential energy and Gibbs chemical energy over a Representative Volume Element (RVE) with respect to an infinitesimal increment of martensite.
Book ChapterDOI
Vibrational properties of shape-memory alloys
Antoni Planes,Lluís Mañosa +1 more
TL;DR: In this paper, the authors discuss vibrational properties of shape-memory alloys, which have the unique property of being able to recover from large deformations by slightly increasing their temperature and the physical mechanism behind this effect is a diffusionless, first-order structural transition, referred to as the martensitic transition.
Journal ArticleDOI
Shape memory in Cu-based alloys: phenomenological behavior at the mesoscale level and interaction of martensitic transformation with structural defects in Cu-Zn-Al
Francisco C. Lovey,V. Torra +1 more
TL;DR: In this paper, the most complex situation (temperature induced and stress free) is characterized via calorimetric and acoustic-emission measurements, and several time-dependent contributions to the Ms and hysteresis cycles are introduced.
Journal ArticleDOI
Thermodynamic analysis of the martensitic transformation in NiTi—I. Effect of heat treatment on transformation behaviour
Yong Liu,Paul Mccormick +1 more
TL;DR: In this paper, the effect of heat treatment on the martensitic transformation behavior of NiTi has been investigated, and it is shown that the occurrence of a two-stage parent-R-martensite transformation on cooling and a single-stage reverse transformation in specimens annealed at intermediate temperatures is a consequence of the irreversible energy loss associated with the transformation.
References
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Journal ArticleDOI
Crystallographic similarities in shape memory martensites
T. Saburi,C.M. Wayman +1 more
TL;DR: The formation of martensite in shape memory alloys having 2H, 3R, 9R and 18R periodic stacking order structures occurs by localized formation of four self-accommodating variants in a plate group.
Journal ArticleDOI
The shape memory mechanism in 18R martensitic alloys
TL;DR: In this article, the deformation behavior and shape memory mechanism in internally faulted 18R martensites in the Cu-Zn-Ga and Cu-AlZn systems were described.
Journal ArticleDOI
A localized soft mode model for the nucleation of thermoelastic martensitic transformation: Application to the β → 9r transformation
G. GuÉnin,P. F. Gobin +1 more
TL;DR: A nucleation model for bcc → 9R martensitic transformation has been developed based on the experimental data from a Cu-Zn-Al alloy as discussed by the authors, and it has been shown through the third order elastic constants values that the C′ = 1/2(C11 - C12) elastic constant in the bcc phase is very sensitive to the homogeneous {011} (011) shear strains.
Journal ArticleDOI
Theoretical Analysis of the Crystallography of the Martensitic Transformation of BCC to 9 R Close-Packed Structure
TL;DR: In this paper, a new mathematical approach of the phenomenological theory, originally developed by Suzuki, has been applied to the martensitic transformation of bcc to 9R close-packed structure which has the "ABCBCACAB" stacking order.
Journal ArticleDOI
The basal plane stacking faults in 18R martensite of copper base alloys
TL;DR: In this paper, the authors used the invisibility criterion to distinguish the stacking faults in N18R martensite from the shear faults in M18R alloys and showed that the displacement vectors of the faults do not lie on the fault planes and are of ± 1/3 or 1/18[¯691] type.
Related Papers (5)
Stress-Induced Martensitic Transformation Cycling and Two-Way Shape Memory Training in Cu-Zn-Al Alloys
Jeff Perkins,R. O. Sponholz +1 more
Dislocation structures produced by reverse martensitic transformation in a CuZn alloy
S. Kajiwara,T. Kikuchi +1 more