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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 3    June 2009

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Effect of environmental temperature on damping capacity of Cu-Al-Mn alloy
JIAO Yu-qin(焦玉琴)1, 2, WEN Yu-hua(文玉华) 1, LI Ning(李 宁)1,
HE Jia-qiang(何加强)1, TENG Jin(滕 劲)1

1. School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China;
2. School of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China

Abstract:The effect of environmental temperature on the damping capacity of Cu-7.66Al-9.52Mn (mass fraction, %) alloy was studied. The result shows that with increasing the environmental temperature, the logarithmic decrement increases firstly and reaches the maximal value of 0.118. The reason is that more phase interfaces and twinning boundaries can move at a higher temperature, leading to higher consumption of energy, in despite of the decreasing of the amount of martensite. When the environmental temperature is above Ms, with further increase in the environmental temperature, the logarithmic decrement decreases sharply mainly because there is little martensite remaining in the alloy.

 

Key words: shape memory alloy; CuAlMn; damping capacity; environmental temperature

ISSN 1672-7029
CN 43-1423/U

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