Effects of Surface Stress-amplitude on the Damping Capacity of CuAlMn Shape Memory Alloys

Zheng Chengqi  Cheng Xiaonong

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Effects of Surface Stress-amplitude on the Damping Capacity of CuAlMn Shape Memory Alloys
Issue 4, Pages: 14-16(2004)
Published： 2004 ，
DOI：

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[1]郑成琪,,,,,,,,,程晓农.应力振幅对CuAlMn记忆合金阻尼特性的影响[J].特种铸造及有色合金,2004(04):14-16+77.

Zheng Chengqi Cheng Xiaonong. Effects of Surface Stress-amplitude on the Damping Capacity of CuAlMn Shape Memory Alloys. [J]. Special Casting & Nonferrous Alloys (4):14-16(2004)
[1]郑成琪,,,,,,,,,程晓农.应力振幅对CuAlMn记忆合金阻尼特性的影响[J].特种铸造及有色合金,2004(04):14-16+77. DOI：

Zheng Chengqi Cheng Xiaonong. Effects of Surface Stress-amplitude on the Damping Capacity of CuAlMn Shape Memory Alloys. [J]. Special Casting & Nonferrous Alloys (4):14-16(2004) DOI：

摘要

运用跟踪滤波技术

采用悬臂梁弯曲共振装置测试了表面应力振幅 4.0 5～ 40 .5MPa范围内CuAlMn形状记忆合金对一阶和二阶共振的衰减能力

研究了表面应力振幅对新型CuAlMn系形状记忆合金阻尼性能的影响。研究结果表明

CuAlMn形状记忆合金无论在母相态

两相区还是马氏体态都具有较高的阻尼性能（Q-1max=0 .12 ）。阻尼性能总体上表现为随表面应力振幅增加而下降

在临界应力以下

母相态合金的阻尼性能下降速度明显快于马氏体态合金

超过临界应力以后

阻尼性能下降趋于平缓而且与组织相关性很小。

Abstract

The efects of surface stress amplitude on damping capacity of new CuAlMn shape memory alloy were examined based on tracing filter technique by measuring deamplification capacity of the alloy in the first and second resonant frequency using cantilevered bending resonant unit at a surface stress amplitude in the range of 4.05～ 40.5 MPa. It was found that the CuAlMn shape memory alloy may possess higher damping capacity in parent phase（ Q -1 max =0.12）

martensite and dual phase either.The overall damping capacity decreased with increasing in the surface stress amplitude.The damping capacity decreased faster in the alloy with parent phase than with martensite below a critical stress while decrease in damping capacity trended evenly over critical stress

slightly dependent on the microstructure.