Effect of Fe on Phase Transformation of Low Temperature Cu-Al-Mn Memory Alloy

Abstract:

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The influence of Fe addition on the phase transformation and the microstructure of Cu67Al27-XMn6FeX shape memory alloys are investigated by means of electrical resistivity, X-ray diffraction, scanning electron microscopy and microhardness test. It was shown that the Ms (Martensitic start transformation) temperature of the 850°C heat-treated alloy exhibit a sharp increase as Fe content increases, by comparison with the alloy without heat-treatment. For example, after 850°C heat-treatment, the Ms temperature of the alloy increases from 52K to 135K when Fe is added from 0 at.% to 1.5 at.%. The microstructure of as-homogenized Cu67Al27-XMn6FeX alloys consists of Cu3Al matrix, γ2 (Cu9Al4) and α (Cu) phases. Fe element was distributed in precipitates and matrix.

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Periodical:

Edited by:

Chengming Li, Chengbao Jiang, Zhiyong Zhong and Yichun Zhou

Pages:

474-479

DOI:

10.4028/www.scientific.net/MSF.687.474

Citation:

K. P. Zhu et al., "Effect of Fe on Phase Transformation of Low Temperature Cu-Al-Mn Memory Alloy", Materials Science Forum, Vol. 687, pp. 474-479, 2011

Online since:

June 2011

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$35.00

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