𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Micromechanics of Tension-Compression Asymmetry of Polycrystalline Shape-Memory-Alloys

✍ Scribed by K. Hackl; W. Zhang; M. Schmidt-Baldassari; U. Hoppe

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
163 KB
Volume
35
Category
Article
ISSN
0933-5137

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The asymmetry associated with martensitic transformations observed in tension/compression experiments of shape‐memory‐alloys (SMAs) is investigated on the basis of a recently suggested micromechanical model. The approach is based on crystallographic theory and utilizes a framework of energy minimization in a finite deformation context. Polycrystalline NiTi under tension demonstrates smaller phase‐transformation start‐strain, differe phase‐transformation stress‐levels and flatter phase‐transformation stress‐strain slopes than that under compression in our numerical simulation. The phase‐transformation start‐stress is followed to have a linear relationship with respect to the temperature within a certain range. These results agree well with experimental results reported in the literature.

📜 SIMILAR VOLUMES

The effect of grain orientation on the t
The effect of grain orientation on the tensile-compressive asymmetry of polycrystalline NiTi shape memory alloy
✍ Y. F. Wang; Z. F. Yue; J. Wang 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 236 KB 👁 1 views

## Abstract The purpose of the present study is to thoroughly understand the influence of crystallographic texture on the stress‐strain asymmetric behavior of polycrystalline NiTi shape memory alloy under tension and compression. To do this, a 3D thermo‐mechanical model has been implemented in a fi

Micromechanical Modelling of Shape Memor
Micromechanical Modelling of Shape Memory Alloy Composites
✍ YF Wang; XM Wang; ZF Yue 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 261 KB

## Abstract An isothermal finite element method (FEM) model has been applied to study the behavior of two kinds of shape memory alloy (SMA) composites. For SMA‐fiber reinforced normal metal composites, the FEM analysis shows that the mechanical behavior of the composites depends on the SMA volume f

Influence of compression aging on phase
Influence of compression aging on phase transition temperatures in single crystalline Ni-rich NiTi shape memory alloys
✍ J. Michutta; A. Yawny; M. C. Carroll; Ch. Somsen; G. Eggeler 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 313 KB

The present paper considers the phase transition behavior of a single crystal Ni-rich NiTi alloy which was compression aged to produce one single family of Ni 4 Ti 3 precipitates. The single crystal material was produced in a two stage process. Polycrystalline material was first melted under an in