Journal ArticleDOI
Stress-induced phase transformation and detwinning in NiTi polycrystalline shape memory alloy tubes
K.L. Ng,Qingping Sun +1 more
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TLDR
In this article, the deformation behavior associated with initial austenite (A), rhombohedral (R) and martensite (M) phase structures was studied in polycrystalline NiTi shape memory alloy tubes by tensile testing at different temperatures.About:
This article is published in Mechanics of Materials.The article was published on 2006-01-01. It has received 106 citations till now. The article focuses on the topics: R-Phase & Diffusionless transformation.read more
Citations
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Experimental study on rate dependence of macroscopic domain and stress hysteresis in NiTi shape memory alloy strips
TL;DR: In this paper, the effects of stretching rate on the stress-induced domains and stress hysteresis in NiTi strips were studied and it was found that the nominal stress-strain curve changed from the near-isothermal plateau-type with distinct stress drops at the very low strain rate to the nearadiabatic smooth hardening-type in the high strain-rate region.
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Tension, compression, and bending of superelastic shape memory alloy tubes
TL;DR: In this paper, superelastic NiTi tubes from a single lot of material were characterized in tension, compression, and pure bending, which allowed the authors to make direct comparisons between the deformation modes for the first time.
Journal ArticleDOI
Thermodynamics of Shape Memory Alloy Wire: Modeling, Experiments, and Application
TL;DR: In this article, a thermomechanical model for a shape memory alloy (SMA) wire under uniaxial loading is implemented in a finite element framework, and simulation results are compared with mechanical and infrared experimental data.
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On the viscous and strain rate dependent behavior of polycrystalline NiTi
C. Grabe,Otto T. Bruhns +1 more
TL;DR: In this article, the viscous and rate dependent behavior of binary, pseudoelastic NiTi is investigated, where the main focus is on the decoupling of thermal and viscous effects on the transformation stress level as the specimen material is subject to heating and cooling due to latent heat generation and absorption during phase transition.
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Experimental investigation on macroscopic domain formation and evolution in polycrystalline NiTi microtubing under mechanical force
P. Feng,Qingping Sun +1 more
TL;DR: In this paper, high-speed data and image acquisition techniques were used to investigate the dynamic and quasi-static events which took place in a displacement-controlled quasistatic tensile loading/unloading process of the tube.
References
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Thermomechanical aspects of NiTi
John A. Shaw,Stelios Kyriakides +1 more
TL;DR: In this article, the uniaxial behavior of a nearly equiatomic NiTi alloy is studied experimentally in a temperature and deformation regime in which the alloy exhibits the shape memory effect and pseudoelasticity.
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On the nucleation and propagation of phase transformation fronts in a NiTi alloy
John A. Shaw,Stelios Kyriakides +1 more
TL;DR: In this article, the deformation history of NiTi was established by photographically recording surface changes of a brittle coating as austenite-martensite phase transition fronts traverse the specimen.
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Deformation and transition behavior associated with theR-phase in Ti-Ni alloys
Shuichi Miyazaki,Kazuhiro Otsuka +1 more
TL;DR: In this paper, the deformation behavior associated with the R-phase (rhombohedral phase) transition and the subsequent martensitic transformation was studied systematically in Ti-Ni alloys by tensile testing over a wide temperature range.
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Stress-induced transformation behavior of a polycrystalline NiTi shape memory alloy: micro and macromechanical investigations via in situ optical microscopy
TL;DR: In this article, an experimental investigation of the micro and macromechanical transformation behavior of polycrystalline NiTi shape memory alloys was undertaken, focusing on macroscopic banding, variant microstructure, effects of cyclic loading, strain rate and temperature effects.
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Initiation and propagation of localized deformation in elasto-plastic strips under uniaxial tension
John A. Shaw,Stelios Kyriakides +1 more
TL;DR: In this paper, the evolution of inhomogeneous deformation in shape memory alloy strips and mild steel strips under uniaxial tension was studied and the similarity of macroscopic events, despite the different mechanisms of instability at the micro-level, prompted them to approximate the material behavior as a finitely deforming elasto-plastic solid with a trilinear up-down-up nominal stress-strain response.