Effects of Bias Springs on Actuation and Transformation Behaviors of TiNi Wires

Huai, Limin; Cui, Li; Zhang, Lai Bin; Yan, Zheng

doi:10.4028/0-87849-960-1.1929

Cited by 1 publication

(2 citation statements)

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“…When the temperature was elevated to higher than A f , the yield stress of the composite was mainly enhanced by TiNi with high transformation stress. Thus, no visible prestrain effect was observed at 373 K. Furthermore, the strengthening effect showed a decreasing trend with increasing prestrain at 298 K. The reverse martensitic transformation behaviour of the TiNi SMA is influenced by many factors including its constrained state as well as the method and temperature of the prestrain application [21][22][23][24]. With increasing prestrain, the recovery degree of the TiNi fibre decreased [23].…”

Section: The Strengthening Effect Of Prestrainmentioning

confidence: 99%

“…Thus, no visible prestrain effect was observed at 373 K. Furthermore, the strengthening effect showed a decreasing trend with increasing prestrain at 298 K. The reverse martensitic transformation behaviour of the TiNi SMA is influenced by many factors including its constrained state as well as the method and temperature of the prestrain application [21][22][23][24]. With increasing prestrain, the recovery degree of the TiNi fibre decreased [23]. This resulted in reduced recovery stress of TiNi and thus the strengthening effect of prestrain on the composite was weakened.…”

Section: The Strengthening Effect Of Prestrainmentioning

confidence: 99%

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Effect of prestrain on tensile property of TiNif/Mg composite

Chenri

Yang

et al. 2019

Materials Science and Technology

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A TiNi shape memory alloy fibre-reinforced AZ31 Mg alloy matrix composite was fabricated herein by spark plasma sintering. The microstructure of the composite and the effect of prestrain on its strength were analysed. The phase transformation of TiNi was observed in situ, and the effect of temperature was monitored. Metallurgical bonding formed at the interface between the TiNi fibre and AZ31 matrix. The prestrain strengthening effect on the yield stress of the composite at 298 K was more dramatic than at 373 K, and the effect decreased with increasing prestrain. The prestrain strengthening effect on tensile strength of the composite was effective at both 298 and 373 K. Because of the difference between recovery stress of TiNi and prestrain-induced compressive stress, higher temperature strengthened the material more significantly than did prestrain application.

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Section: The Strengthening Effect Of Prestrainmentioning

confidence: 99%