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Huang, Wei; Lim, H. K.

doi:10.1023/a:1025742926286

Cited by 12 publications

(8 citation statements)

References 2 publications

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“…However, the test reported by Xiang and Liu [11] on NiTi polycrystalline wires of different initial phases shows no sign of increase at all. In contrast, Huang and Lim [12] reported that the Young's modulus of a martensite NiTi wire increases and then decrease slightly in the very later stage in uniaxial tension (refer to Fig. 4).…”

Section: Introductionmentioning

confidence: 89%

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V-shape in Young's modulus versus strain relationship in shape memory alloys upon mechanical loading

Huang

Lim

et al. 2005

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 89%

“…Young's modulus vs. strain relationship of a NiTi polycrystalline NiTi wire (initially twinned martensite phase)[12].…”

mentioning

confidence: 99%

V-shape in Young's modulus versus strain relationship in shape memory alloys upon mechanical loading

Huang

Lim

et al. 2005

Journal of Alloys and Compounds

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“…Some of these studies report cyclic response of NiTi for martensitic initial conditions [6], but most of them deal with cyclic superelastic behavior of the SIM transformation [7][8][9][10][11][12]. The SIM transformation has been usually performed with specimens in form of wire, from 0.7 to 2 mm in diameter, because they show higher strength and damping properties compared with larger diameter wires [10].…”

Section: Introductionmentioning

confidence: 99%

Impact fatigue behavior of superelastic NiTi shape memory alloy wires

Zurbitu

Santamarta

Picornell

et al. 2010

Materials Science and Engineering: A

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a b s t r a c tSuperelastic cyclic behavior of NiTi wires was studied by cyclically deforming several samples at impact strain rates on the order of 10 s −1 , using an instrumented tensile-impact device. The stress-strain cycles were performed up to different maximum strain ratios in order to study the cyclic impact fatigue for the incomplete, complete stress-induced martensitic transformation, and for the elastoplastic deformation of the martensitic phase. Impact results show that the stress-induced martensitic transformation stresses decrease with the number of cycles, although this decrease is lower than that obtained in cycling fatigue experiments performed at low strain rates. This suggests that the increment of the dislocation density, responsible for the stress reduction, depends on the strain rate applied during deformation. Moreover, the near-adiabatic condition fulfilled when deforming at high strain rates, promoting higher stress-induced martensitic transformation stresses during cycling at impact than the ones reached at low strain rates. In addition, the dissipated energy per cycle is also affected by the strain rate, being at impact 10-15% lower than the values obtained when the deformation occurs in isothermal conditions, that is at strain rates lower than 10 −4 s −1 .

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“…Due to the thermoelastic martensitic transformation, the mechanical properties of NiTi, especially elastic modulus and damping capacity, show a remarkable response to temperature and strain. Previous works have revealed different trends for the dependence of elastic modulus on strain and temperature [3][4][5]. The experimentally determined macro scale modulus of austenite and martensite phases are in the range of 30-80 GPa and 20-50 GPa respectively [5,6].…”

Section: Introductionmentioning

confidence: 90%

“…It is, therefore, obvious that the variation of elastic modulus of different phases with strain as well as microstructure is still not understood completely. According to the published literature [2][3][4][5][6][7], moduli of both the austenite and martensite phases vary with strain. The strain distribution in the material varies depending on several microstructural features, like different phases, grain boundary, orientation of the grain and orientation gradient within the grains.…”

Section: Introductionmentioning

confidence: 99%