Rare Metals

, 30:527 | Cite as

Aging-induced two-stage reverse martensitic transformation behavior in Co46Ni27Ga27 high-temperature shape memory alloy

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Abstract

The effect of austenite aging at 823 K on the microstructures and martensitic transformation behavior of Co46Ni27Ga27 alloy has been investigated using optical microscopy (OM), transmission electron microscopy (TEM), X-ray diffraction analysis (XRD), and differential scanning calorimeter (DSC). The microstructure observation results show that the unaged Co46Ni27Ga27 alloy is composed of the tetragonal nonmodulated martensite phase and face-centered cubic γ phase. It is found that a new nanosized fcc phase precipitates in the process of austenite aging, leading to the formation of metastable age-affected martensite around the precipitates with composition inhomogeneity. Two-stage reverse martensitic transformation occurs in the samples aged for 2 and 24 h due to the composition difference between the age-affected martensite and the original martensite. For the Co46Ni27Ga27 alloy aged for 120 h, no reverse transformation can be detected due to the disappearance of the metastable age-affected martensite and the small latent heat of the original martensite. The martensitic transformation temperatures of the Co46Ni27Ga27 alloy decrease with an increase in aging time.

Keywords

shape memory alloys aging phase transformations microstructure 
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References

  1. [1]
    Otsuka K. and Wayman C.M., Shape Memory Materials, Cambridge University Press, Cambridge, 1998: 220.Google Scholar
  2. [2]
    Zhao L.C., Cai W., and Zheng Y.F., Shape Memory Effect and Superelasticity in Alloys, National Defense Industry Press, Beijing, 2002: 5.Google Scholar
  3. [3]
    Yang J.H. and Wayman C.M., On the formation mechanism of Ni5Al3 in NiAl-base alloys: Part I. Microstructures, Intermetallics, 1994, 2(2): 111.CrossRefGoogle Scholar
  4. [4]
    Golberg D., Xu Y., Murakami Y., Otsuka K., and Ueki T., High temperature shape memory effect in Ti50Pd50−xNix (x = 10, 15, 20) alloys, Mater. Lett., 1995, 22(5): 241.CrossRefGoogle Scholar
  5. [5]
    Bigelow G.S., Padula S.A., Garg A., Padula II S.A., Garg A., and Noebe R.D., Correlation between mechanical behavior and actuator-type performance of Ni-Ti-Pd high-temperature shape memory alloys, Proc. SPIE, 2007, 6526: Art. No. 65262B.Google Scholar
  6. [6]
    Tong Y.X., Chen F., Tian B., Li L., and Zheng Y.F., Microstructure and martensitic transformation of Ti49Ni51−xHfx high temperature shape memory alloys, Mater. Lett., 2009, 63(21): 1869.CrossRefGoogle Scholar
  7. [7]
    Xu H.B., Cu-based high-temperature shape-memory alloys and their thermal stability, Mater. Sci. Forum, 2002, 394–395: 375.CrossRefGoogle Scholar
  8. [8]
    Firstov G.S., Humbeeck J.V., and Koval Y.N., High-temperature shape memory alloys some recent developments, Mater. Sci. Eng. A, 2004, 378(1–2): 2.Google Scholar
  9. [9]
    He Z.R., Zhou J.E, and Furuya Y., Effect of Ta content on martensitic transformation behavior of RuTa ultrahigh temperature shape memory alloys, Mater. Sci. Eng. A, 2003, 348(1–2): 36.Google Scholar
  10. [10]
    Xu H.B., Li Y., and Jiang C.B., Ni-Mn-Ga high-temperature shape memory alloys, Mater. Sci. Eng. A, 2006, 438–440: 1065.Google Scholar
  11. [11]
    Craciunescu C., Kishi Y., Lograsso T.A., and Wutting M., Martensitic transformation in Co2NiGa ferromagnetic shape memory alloys, Scripta Mater., 2002, 47(4): 285.CrossRefGoogle Scholar
  12. [12]
    Chernenko V.A., Pons J., Cesari E., and Perekos A.E., Martensitic transformation in a ferromagnetic Co-Ni-Ga single crystal, Mater. Sci. Eng. A, 2004, 378(1–2): 357.Google Scholar
  13. [13]
    Dadda J., Maier H.J., Karaman I., Karaca H.E., and Chumlyakov Y.I., Pseudoelasticity at elevated temperatures in [001] oriented Co49Ni21Ga30 single crystals under compression, Scripta Mater., 2006, 55(8): 663.CrossRefGoogle Scholar
  14. [14]
    Liu J., Xie H., Huo Y.Q., Zheng H.X., and Li J.G., Microstructure evolution in CoNiGa shape memory alloys, J. Alloys Compd., 2006, 420(1–2): 145.CrossRefGoogle Scholar
  15. [15]
    Liu J., Zheng H.X., Xia M.X., Huang Y.L., and Li J.G., Martensitic transformation and magnetic properties in Heusler CoNiGa magnetic shape memory alloys, Scripta Mater., 2005, 52(5): 935.Google Scholar
  16. [16]
    Li Y., Xin Y., Chai L., Ma Y.Q., and Xu H.B., Microstructures and shape memory characteristics of dual-phase Co-Ni-Ga high-temperature shape memory alloys, Acta Mater., 2010, 58(10): 3655.CrossRefGoogle Scholar
  17. [17]
    Khalil Allafi J., Ren X., and Eggeler G., The mechanism of multistage martensitic transformations in aged Ni-rich NiTi shape memory alloys, Acta Mater., 2002, 50(4): 793.CrossRefGoogle Scholar
  18. [18]
    Seguí C., Cesari E., Font J., Muntasell J., and Chernenko V.A., Martensite stabilization in a high temperature Ni-Mn-Ga alloy, Scripta Mater., 2005, 53(3):315.CrossRefGoogle Scholar
  19. [19]
    Khovailo V.V., Kainuma R., Abe T., Oikawa K., and Takagi T., Aging-induced complex transformation behavior of martensite in Ni57.5Mn17.5Ga25 shape memory alloy, Scripta Mater., 2004, 51(4): 13.Google Scholar
  20. [20]
    Xin Y., Li Y., Chai L., and Xu H.B., The effect of aging on the Ni-Mn-Ga high-temperature shape memory alloys, Scripta Mater., 2006, 54(6): 1139.CrossRefGoogle Scholar
  21. [21]
    Chen J., Li Y., Shang J.X., and Xu H.B., The effects of alloying elements Al and In on Ni-Mn-Ga shape memory alloys, from first principles, J. Phys. Condens. Matter, 2009, 21(4): Art. No. 045506.Google Scholar

Copyright information

© The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringBeihang UniversityBeijingChina
  2. 2.Beijing Key Laboratory for Advanced Functional Materials and Thin Film TechnologyBeihang UniversityBeijingChina
  3. 3.Key Laboratory of Aerospace Materials and Performance (Ministry of Education of China)Beihang UniversityBeijingChina
  4. 4.School of Energy, Power and Mechanical EngineeringNorth China Electric Power UniversityBeijingChina

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