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首页> 外文期刊>Materials Science and Engineering >Improvements in the mechanical properties of the 18R↔ 6R high-hysteresis martensitic transformation by nanoprecipitates in CuZnAl alloys
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Improvements in the mechanical properties of the 18R↔ 6R high-hysteresis martensitic transformation by nanoprecipitates in CuZnAl alloys

机译：CuZnAl合金中纳米沉淀对18R↔6R高滞后马氏体相变力学性能的改善

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摘要

The 18R↔ 06R martensite-martensite transformation in Cu-based alloys exhibits large hysteresis, large pseudoelastic strain and weak transformation stress dependence on temperature. However, concomitant plastic deformation taking place in the 6R phase inhibits the use of these properties for applications. A novel approach to minimizing or even suppressing 6R plastic deformation during the 18R-6R transformation in CuZnAl shape-memory alloy single crystals with electronic concentration e/a = 1.48 is presented. The method is based on a thermal treatment that introduces nanoprecipitates in the alloy. Results suggest that the role of CuZnAl shape-memory alloys in engineering should be reconsidered, as many energy damping applications could benefit from the huge hysteresis associated with the 18R-6R transformation, once the 6R plastic deformation is suppressed.
机译：铜基合金中的18R↔06R马氏体-马氏体相变表现出较大的磁滞现象，较大的拟弹性应变以及对温度的弱相变应力依赖性。但是，伴随在6R相中发生的塑性变形会抑制这些特性在应用中的使用。提出了一种在电子浓度e / a = 1.48的CuZnAl形状记忆合金单晶中最小化或什至抑制18R-6R转变过程中6R塑性变形的新方法。该方法基于热处理，该热处理将纳米沉淀物引入合金中。结果表明，应重新考虑CuZnAl形状记忆合金在工程中的作用，因为一旦抑制了6R塑性变形，许多能量阻尼应用可能会受益于18R-6R转变带来的巨大滞后。

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