Multiple plastic deformation mechanisms of NiTi shape memory alloy based on local canning compression at various temperatures

Hu, Li; Jiang, Shengyao; Zhang, Yanqiu; Zhao, Yuyuan; Liu, Siwei; Zhao, Chengzhi

doi:10.1016/j.intermet.2015.12.003

Cited by 52 publications

(16 citation statements)

References 35 publications

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“…5b). Stress-strain curves of wires selected for systematic tensile testing in wide temperature range are in bold and colored (pulse times (8,10,12,14,15,16,18,20) ms). It is well known, that tensile deformation of NiTi wires in the plateau range is localized in macroscopic interfaces-martensite band fronts propagating at constant force along the wire and converting the austenitic microstructure into the presumably martensitic microstructure within the martensite band [14].…”

Section: Resultsmentioning

confidence: 99%

“…Stress-strain curves recorded in tensile tests until rupture on various NiTi wires (pulse times (8,10,12,14,15,16,18,20) ms) in temperature range from -100 up to 200°C are shown in Fig. 6.…”

Section: Tensile Tests Until Rupture At Various Test Temperaturesmentioning

confidence: 99%

“…Fig. 9 Cyclic superelastic tensile tests (20 cycles) at room temperature 20°C on NiTi wires with different microstructures denoted by pulse times (7,8,10,12,14,15,16,19,20) ms Shap. Mem.…”

Section: Tensile Tests Until Rupture At Various Test Temperaturesmentioning

confidence: 99%

“…5, 6, 7, and 8, which is of main interest for engineering applications of superelastic NiTi wires. To present relevant experimental evidence on that, we have performed cyclic superelastic tensile tests on selected NiTi wires (pulse times (7,8,10,12,14,15,16,18,20) ms) at room temperature (Figs. 9, 10, 11, 12) and on the 12 ms wire at various temperatures (Figs.…”

Section: Cyclic Superelastic Testsmentioning

confidence: 99%

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Tensile Deformation of Superelastic NiTi Wires in Wide Temperature and Microstructure Ranges

Chen

Tyc

Molnárová

et al. 2018

Shap. Mem. Superelasticity

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Superelastic NiTi wires were prepared from a single cold worked wire by various electropulse heat treatments. The wires having a wide range of virgin microstructures were subjected to tensile tests until rupture and cyclic superelastic tensile testing in a wide temperature range. The results were complemented by TEM observation of lattice defects created by superelastic cycling. It appeared that the yield stress depends significantly on the wire microstructure and less on the test temperature. The upper plateau stress varies with the microstructure through its effect on the Ms temperature and increases with increasing temperature in accord with the Clausius-Clapeyron equation up to a maximum temperature characteristic for each microstructure. The upper plateau strains exhibit pronounced maxima (12-18%) at test temperatures and microstructures (pulse times), at which the upper plateau stress approaches the yield stress. The instability of cyclic superelastic deformation was found to be inversely related to the difference between the yield stress and upper plateau stress. Cyclic deformation introduces dislocation slip in the microstructure of the cycled wire from the 3rd cycle and promotes formation of {114} austenite twins upon later cycling. These observations were explained by the activation of deformation twinning in oriented martensite and the stress induced B2 ) B19 0 ) B2 T martensitic transformation in specific range of microstructures and temperatures. The ductility of the tested wires was observed to vary stepwise with microstructure from * 13 up to * 55% and gradually decreased with temperature increasing above 100°C.

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Section: Resultsmentioning

confidence: 99%

Section: Tensile Tests Until Rupture At Various Test Temperaturesmentioning

confidence: 99%

“…Fig. 9 Cyclic superelastic tensile tests (20 cycles) at room temperature 20°C on NiTi wires with different microstructures denoted by pulse times (7,8,10,12,14,15,16,19,20) ms Shap. Mem.…”

Section: Tensile Tests Until Rupture At Various Test Temperaturesmentioning

confidence: 99%

Section: Cyclic Superelastic Testsmentioning

confidence: 99%

See 2 more Smart Citations

Tensile Deformation of Superelastic NiTi Wires in Wide Temperature and Microstructure Ranges

Chen

Tyc

Molnárová

et al. 2018

Shap. Mem. Superelasticity

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“…Over the past decades, a number of investigations have attempted to identify, quantify or at least clarify the nature and significance of various mechanisms that contribute to understanding plastic deformation of NiTi SMA under different deformation conditions. In general, a plastic deformation mechanism of NiTi SMA is temperature-dependent and thus exhibits a predominant distinction in the case of various temperatures, where multiple plastic deformation mechanisms can occur, including stress-induced martensite phase transformation, dislocation slip, deformation twinning, grain boundary slide, grain rotation, dislocation climb and grain boundary migration [4,5]. In particular, above the austenite finish temperature (A f ), stress-induced martensite transformation occurs up to the martensite desist temperature (M d ).…”

Section: Introductionmentioning

confidence: 99%

A Combined Experimental-Numerical Approach for Investigating Texture Evolution of NiTi Shape Memory Alloy under Uniaxial Compression

Jiang

Zhang

2017

Metals

Self Cite

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Texture evolution of NiTi shape memory alloy was investigated during uniaxial compression deformation at 673 K (400 • C) by combining crystal plasticity finite element method with electron back-scattered diffraction experiment and transmission electron microscope experiment. Transmission electron microscope observation indicates that dislocation slip rather than deformation twinning plays a dominant role in plastic deformation of B2 austenite NiTi shape memory alloy at 673 K (400 • C). Electron back-scattered diffraction experiment illustrates heterogeneous microstructure evolution resulting from dislocation slip in NiTi shape memory alloy at 673 K (400 • C). {110}<100>, {010}<100> and {110}<111> slip systems are introduced into a crystal plasticity constitutive model. Based on the constructed representative volume element model and the extracted crystallographic orientations, particle swarm optimization algorithm is used to identify crystal plasticity parameters from experimental results of NiTi shape memory alloy. Using the fitted material parameters, a crystal plasticity finite element method is used to predict texture evolution of NiTi shape memory alloy during uniaxial compression deformation. The simulation results agree well with the experimental ones. With the progression of plastic deformation, a crystallographic plane of NiTi shape memory alloy gradually rotates to be vertical to the loading direction, which lays the foundation for forming the <111> fiber texture.

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Shape Memory Nanomaterials for Damping Applications

Okotete

Osundare

Olajide

et al. 2020

Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications

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Multiple plastic deformation mechanisms of NiTi shape memory alloy based on local canning compression at various temperatures

Cited by 52 publications

References 35 publications

Tensile Deformation of Superelastic NiTi Wires in Wide Temperature and Microstructure Ranges

Tensile Deformation of Superelastic NiTi Wires in Wide Temperature and Microstructure Ranges

A Combined Experimental-Numerical Approach for Investigating Texture Evolution of NiTi Shape Memory Alloy under Uniaxial Compression

Shape Memory Nanomaterials for Damping Applications

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