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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Influence of composition and heat-treatment on
 damping capacity of Cu-Al alloys
CHEN Yi-sheng(陈一胜), LIU Ping(刘 萍), LI Yong(李 勇), WANG Bao-jian(王宝健)

Institute of Materials and Chemical Engineering, Jiangxi University of Science and Technology,
Ganzhou 341000, China

Abstract:The compositions, structures and properties of four kinds of Cu-Al alloys with different constituents were researched by means of optical microscopy, scanning electron microscopy, X-ray diffractometry and damping detection. The structures and properties of Cu-11Al-5Mn-RE experienced different heat-treatment processes were also studied. The results indicate that the damping capacity and microstructure of the alloys are improved by adding Mn and RE elements. Cu-11Al-5Mn-RE obtains the best comprehensive physical performance because of the cooperation of Mn and RE elements. Aging at 200 ℃, the damping capacity gets to the maximum. At 400 ℃, its mechanical property decreases while its damping capacity still remains, indicating its resistance to martensite decomposition and aging at moderate temperature.

 

Key words: damping alloy; rare earth; martensite; aging

ISSN 1672-7029
CN 43-1423/U

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