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Proceedings Paper

Characterization study of modified Cu-Zn-Al shape memory alloy with the addition of Mn and Zr
Author(s): Wenhui Zou; C. W. H. Lam; Jonathan Chi Yuen Chung; Joseph K. L. Lai
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Paper 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.

Paper Details

Date Published: 14 February 1997
PDF: 10 pages
Proc. SPIE 3040, Smart Structures and Materials 1997: Smart Materials Technologies, (14 February 1997); doi: 10.1117/12.267129
Show Author Affiliations
Wenhui Zou, City Univ. of Hong Kong (Hong Kong)
C. W. H. Lam, City Univ. of Hong Kong (Hong Kong)
Jonathan Chi Yuen Chung, City Univ. of Hong Kong (Hong Kong)
Joseph K. L. Lai, City Univ. of Hong Kong (Hong Kong)

Published in SPIE Proceedings Vol. 3040:
Smart Structures and Materials 1997: Smart Materials Technologies
Wilbur C. Simmons; Ilhan A. Aksay; Dryver R. Huston, Editor(s)

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