Acta Mechanica Solida Sinica

, Volume 21, Issue 1, pp 1–8 | Cite as

Characteristics of stress-induced transformation and microstructure evolution in Cu-based SMA

  • Cheng Peng
  • Xingyao Wang
  • Yongzhong Huo


The mechanical behavior of shape memory alloys (SMAs) is closely related to the formation and evolution of its microstructures. Through theoretical analysis and experimental observations, it was found that the stress-induced martensitic transformation process of single crystal Cu-based SMA under uniaxial tension condition consisted of three periods: nucleation, mixed nucleation and growth, and merging due to growth. During the nucleation, the stress dropped rapidly and the number of interfaces increased very fast while the phase fraction increased slowly. In the second period, both the stress and the interface number changed slightly but the phase fraction increased dramatically. Finally, the stress and the phase fraction changed slowly while the number of interfaces decreased quickly. Moreover, it was found that the transformation could be of multi-stage: sharp stress drops at several strains and correspondingly, the nucleation and growth process occurred quasi-independently in several parts of the sample.

Key words

stress-induced martensitic transformation CuAlNi single crystal microstructure nucleation growth 


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  1. [1]
    Yang, K. and Gu, C.L., Research and application of the shape memory alloy. Metallic Functional, 2000, 17(15): 7–12.Google Scholar
  2. [2]
    Dominiek, R. and Hendrik, V.B., Design aspects of shape memory actuators. Mechatronics, 1998, 8(6): 635–656.CrossRefGoogle Scholar
  3. [3]
    Gao, Z.G., Application of the shape memory alloys. Modern Manufacturing Technology and Equipment, 2007, 1: 44–45.Google Scholar
  4. [4]
    Geng, B., Review on the research status and applied characters of shape memory alloy and its applied character. Journal of Liaoning University (Natural Sciences Edition), 2007, 34(3): 225–228.Google Scholar
  5. [5]
    Otsuka, K. and Wayman, C.M., Shape Memory Alloys. Cambridge: Cambridge University Press), 1998.Google Scholar
  6. [6]
    Zhang, L., Xie, C.Y. and Wu, J.S., Progress in research on shape memory alloy films in MEMS field. Materials Review, 2006, 2: 109–113.Google Scholar
  7. [7]
    Bhattacharya, K. and James, R.D., A theory of thin films of martensitic materials with applications to microactuators. Journal of the Mechanics & Physics of Solids, 1999, 47: 531–576.MathSciNetCrossRefGoogle Scholar
  8. [8]
    Xu, Z.Y., Martensitic Transformation and Martensite. Beijing: Science Press, 1980.Google Scholar
  9. [9]
    Fang, D.N., Lu, W. and Hwang, K.C., Pseudoelastic behavior of a CuAlNi single crystal under uniaxial loading. Metallurgical and Materials Transactions A, 1999, 30: 1933–1943.CrossRefGoogle Scholar
  10. [10]
    Shield, T.W., Orientation dependence of the pseudoelastic behavior of single crystal of Cu-Al-Ni in tension. Journal of the Mechanics & Physics of Solids, 1995, 43: 869–895.CrossRefGoogle Scholar
  11. [11]
    Otsuka, K., Wayman, C.M., Nakai, K., Sakamoto, H. and Shimizu, K., Superelasticity effects and stress-induced martensitic transformations in Cu-Al-Ni alloys. Acta materialia, 1976, 24: 207–226.CrossRefGoogle Scholar
  12. [12]
    Sun, Q.P., Xu, T.T. and Zhang, X.Y., On deformation of A-M interface in single crystal shape memory alloys and some related issues. Journal of Engineering Materials and Technology Transactions of the ASME, 1999, 121(1): 38–43.CrossRefGoogle Scholar
  13. [13]
    Huo, Y. and Müller, I., Interfacial and inhomogeneity penalties in phase transitions. Continuum Mechanics and Thermodynamics, 2003, 15: 395–407.MathSciNetCrossRefGoogle Scholar
  14. [14]
    Vainchtein, A., Healey, T. and Rosakis, P., Bifurcation and metastability in a new one dimensional model for martensitic phase transitions. Computer Methods in Applied Mechanics and Engineering, 1999, 170: 407–421.MathSciNetCrossRefGoogle Scholar
  15. [15]
    Liu, Q., Ren, J.T., Jiang, J.S. and Guo, Y.Q., An overview of the constitutive model of shape memory alloy and their applications. Advances in Mechanics, 2007, 37(2): 189–204.Google Scholar
  16. [16]
    Wang, J. and Sheng, Y.P., The development of the constitutive relation of a shape memory alloy. Chinese Quarterly of Mechanics, 1998, 19(3): 185–195.Google Scholar
  17. [17]
    Seelecke, S. and Mueller, I., Shape memory alloy actuators in smart structures: modeling and simulation. Applied Mechanics Review, 2004, 57(1): 27–46.CrossRefGoogle Scholar
  18. [18]
    Truskinovsky, L. and Zanzotto, G., Ericksen bar revisited: energy wiggles. Journal of the Mechanics & Physics of Solids, 1996, 44(8): 1371–1408.MathSciNetCrossRefGoogle Scholar
  19. [19]
    Huo, Y. and Müller, I., Nonequilibrium thermodynamics of pseudoelasticity. Continuum Mechanics and Thermodynamics, 1993, 5: 163–204.MathSciNetCrossRefGoogle Scholar
  20. [20]
    Huo, Y.Z., Continuum thermodynamical studies on the thermal-elastic martensitic transformation. Advances in Mechanics, 2005, 35(3): 305–314.Google Scholar

Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2008

Authors and Affiliations

  1. 1.Department of Mechanics and Engineering ScienceFudan UniversityShanghaiChina

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