Characterization study of modified Cu-Zn-Al shape memory alloy with the addition of Mn and Zr

Wenhui Zou; C. W. H. Lam; Jonathan Chi Yuen Chung; Joseph K. L. Lai

doi:10.1117/12.267129

14 February 1997 Characterization study of modified Cu-Zn-Al shape memory alloy with the addition of Mn and Zr

Wenhui Zou, C. W. H. Lam, Jonathan Chi Yuen Chung, Joseph K. L. Lai

Proceedings Volume 3040, Smart Structures and Materials 1997: Smart Materials Technologies; (1997) https://doi.org/10.1117/12.267129
Event: Smart Structures and Materials '97, 1997, San Diego, CA, United States

Abstract

As a modification of Cu-Zn-Al shape memory alloy (SMA), the characteristics of Cu-21Zn-6Al-1Mn-0.5Zr (wt%) SMA are examined and compared with that of Cu-21Zn-6Al (wt%) SMA in the present work. After added Zr into the Cu-Zn-Al alloy, the average grain size of Cu-Zn-Mn-Zr alloy is reduced from 300 micrometers (that of Cu-Zn-Al alloy) to 75 micrometers . Two Zr-rich new phases were found in Zr added alloy by means of transmission electron microscopy. The tensile testing results and scanning electron microscopy observations show that the strength of grain boundary and the ductility of the Mn, Zr added alloy were enhanced. This has made the alloy exhibit better mechanical property than ordinary Cu-Zn-Al SMA. Moreover, upon ageing, the reordering phenomenon was not serious when the aging temperature was below 200 degree(s)C in Cu-Zn-Al-Mn-Zr alloy while significant decrease of order degree and shape memory capacity were found for Cu-Zn-Al alloy.

Citation Download Citation

Wenhui Zou, C. W. H. Lam, Jonathan Chi Yuen Chung, and Joseph K. L. Lai "Characterization study of modified Cu-Zn-Al shape memory alloy with the addition of Mn and Zr", Proc. SPIE 3040, Smart Structures and Materials 1997: Smart Materials Technologies, (14 February 1997); https://doi.org/10.1117/12.267129

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