Transformation and shape memory behaviors of deformed and annealed Ti-50.8Ni-0.1Nb alloy

被引：0
|
作者：
He Z.-R. [1 ]
Liu K.-K. [1 ]
Wang F. [2 ]
Feng H. [1 ]
Du Y.-Q. [1 ]
机构：
[1] School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong
[2] Library, Shaanxi University of Technology, Hanzhong
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2019年 / 29卷 / 04期
关键词：
Annealing; Shape memory alloy; Shape memory behavior; Ti-Ni-Nb alloy; Transformation;
D O I：
10.19476/j.ysxb.1004.0609.2019.04.10
中图分类号：
学科分类号：
摘要：
The effects of annealing temperature (Ta) on the microstructure, phase transformation and shape memory behavior of cold drawing Ti-50.8Ni-0.1Nb (mole fraction, %) shape memory alloy were investigated by XRD, optical microscopy, differential scanning calorimetry and tensile test. The results show that the phase compositions of Ti-50.8Ni-0.1Nb alloy annealed at 350-700 ℃ are martensite M (B19', monoclinic) and parent phase A (B2, CsCl). With increasing Ta, the microstructure morphology of the alloy changes from fibrous to equiaxed grain, the recrystallization temperature is about 580 ℃; the transformation types of the alloy change from A→R→M/M→R→A to A→R→M/M→A to A→M/M→A (A-parent phase B2, CsCl; R-R phase, rhombohedral; M-martensite B19', monoclinic) upon cooling/heating, the R transformation temperature of the alloy decreases, the M transformation temperature and temperature hysteresis increases firstly and then decreases, the R transformation temperature hysteresis is 6.7-9.8 ℃. The tensile strength of the alloy annealed at 350-550 ℃ is higher than that of the alloy annealed at 600-700 ℃, while the percentage elongation of the former is lower than that of the latter. The alloy annealed at 400-550 ℃ shows shape memory effect, and the alloys annealed at 300 ℃ and 600-700 ℃ show superelasticity. With increasing stress-strain cycling number, the platform stress in the stress-strain curve of the alloy decreases. The stability of the shape memory effect in the alloy annealed at 400-550 ℃ and the superelasticity in the alloy annealed at 600-700 ℃ are well. © 2019, Science Press. All right reserved.
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页码：742 / 748
页数：6
相关论文
共 21 条
  • [1] Saikrishna C.N., Ramaiah K.V., Paul D., Bhaumik S.K., Enhancement in fatigue life of NiTi shape memory alloy thermal actuator wire, Acta Materialia, 102, pp. 385-396, (2016)
  • [2] He Z., Liu M., Effect of heat treatment on transformation behavior of Ti-Ni-V shape memory alloy, Materials Science and Engineering A, 528, 22, pp. 6993-6997, (2011)
  • [3] Daghash S.M., Ozbulut O.E., Characterization of superelastic shape memory alloy fiber-reinforced polymer composites under tensile cyclic loading, Materials and Design, 111, pp. 504-512, (2016)
  • [4] He Z.-R., Liu M.-Q., Wang F., Zhang Y.-H., Wang Y.-S., Effect of aging process on microstructure and superelasticity of Ti-Ni-V shape memory alloy, The Chinese Journal of Nonferrous Metals, 23, 5, pp. 1301-1306, (2013)
  • [5] Jani J.M., Leary M., Subic A., Gibson M.A., Review of shape memory alloy research, applications and opportunities, Materials and Design, 56, pp. 1078-1113, (2014)
  • [6] Kang X., Li Y., Yin X., Xie H., Mi X., The microstructure and properties of Ti50Ni47Fe3 and Ti50Ni46.75Fe3Cr0.25 shape memory alloy, Advanced Materials Research, 631-632, pp. 326-330, (2013)
  • [7] Rong L., Miller D.A., Lagoudas D.C., Transformation behavior in a thermomechanically cycled TiNiCu alloy, Metallurgical and Materials Transactions A, 32, 11, pp. 2689-2693, (2001)
  • [8] Shang Z.-J., Wang Z.-M., Li X.-B., Zheng B.-Y., Effects of cold deformation on the shape memory effect of TiNiCu alloy bars, Mechanical Science and Technology for Aerospace Engineering, 29, 7, pp. 902-905, (2010)
  • [9] He Z., Liu M., Effects of annealing and deforming temperature on microstructure and deformation characteristics of Ti-Ni-V shape memory alloy, Materials Science and Engineering B, 177, pp. 986-991, (2012)
  • [10] Li G.-F., Sun Y.-Y., Hong Q.-H., Influence of heat treatment temperature on phase transformation temperature and microstructure of NiTiNb<sub>5</sub> alloy, Special Casting and Nonferrous Alloys, 32, 3, pp. 15-18, (2012)
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