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| ON THE RAPIDLY SOLIDIFIED Cu-Zn-Al SHAPE MEMORY ALLOY |
| JIN Jialing; SHAO Zichang (Shanghai Institute of Iron and Steel Research) |
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Cite this article:
JIN Jialing; SHAO Zichang (Shanghai Institute of Iron and Steel Research). ON THE RAPIDLY SOLIDIFIED Cu-Zn-Al SHAPE MEMORY ALLOY. Acta Metall Sin, 1986, 22(2): 37-150.
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Abstract The shape memory properties, microstructure and the influence of heat treament on them of Cu-24.9wt-%Zn-4.5wt-%Al alloy ribbon of different sizes prepared by rapid solidification technique have been investigated by means of σ-εand R-T curves, optical metallography, X-ray diffraction, SEM and TEM. The results showed that the alloy ribbon is of a fine-grained β structure, about 20 μn, originally, and grows up to about 100μm after water quenching from 720℃ for 10 rain. For the alloy with a β+M structure at room temperature, its optimum shape memory properties may be obtained and the embrittlement by grain coarsening may be avoided. The complete memory recovery may be realized with the strain no more than 8%. The formation of granular relief and martensite on the specimen surface seems to be reversible during deformation under loading.
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Received: 18 February 1986
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1 Perkins, J., Metall. Trans., 13A (1982) , 1367．
2 Wood, J.V.; Shingu, P.H., Metall. Trans., 15A (1984) , 471．
3 孔祥炎;高安娟,中南矿冶学院学报,(1983) ,№2,49． |
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