Effect of Annealing Temperature on Memory Behaviors and Mechanical Properties of Ti-50.8Ni-0.1Zr Shape Memory Alloy Wire

被引：0
|
作者：
Ye J. [1 ]
He Z. [1 ]
Zhang K. [1 ]
Feng H. [1 ]
机构：
[1] School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong
来源：
Cailiao Daobao/Materials Reports | 2021年 / 35卷 / 04期
关键词：
Annealing temperature; Shape memory alloy; Shape memory effect; Superelasticity; Ti-50.8Ni-0.1Zr alloy wire;
D O I：
10.11896/cldb.19100010
中图分类号：
学科分类号：
摘要：
The effect of annealing temperature (Ta) on the shape memory effect, superelasticity, mechanical properties and fracture morphology of Ti-50.8Ni-0.1Zr alloy wire were investigated by tensile test, differential scanning calorimetry, optical microscope and scanning electron microscopy. The results are as follows. The alloy wires annealed at 350-400℃ and 600-700℃ present superelasticity (SE), the maximum value (483 MPa) of the platform stress and the minimum value (0.1%) of the residual strain are all obtained in the alloy wires annealed at 600℃, and the stability of SE in the alloy wires annealed at 350-400℃ is the best. The alloy wires annealed at 450-550℃ present shape memory effect (SME), the minimum value (190 MPa) of the platform stress is obtained in the alloy wire annealed at 500℃, and the maximum value (4.9%) of the residual strain is obtained in the alloy wire annealed at 450℃, and the stability of SME in the alloy wire annealed at 450℃ is the best. The plasticity of the alloy wires annealed at 600-700℃ is superior to the alloy wires annealed at 350-550℃, but the strength is less than that of the latter. The maximum value (1 489 MPa) of the tensile strength is obtained in the alloy wire annealed at 400℃, and the maximum value (35.1%) of the percentage elongation is obtained in the alloy wire annealed at 650℃. The fracture morphology of the alloy wire presents dimple, and su-bordinates to ductile fracture of the microporous aggregation. Ta has little effect on fracture morphology. © 2021, Materials Review Magazine. All right reserved.
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页码：04118 / 04123
页数：5
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