Effect of Isothermal Ageing on Damping Capacity of Cu-20.4Al-8.7Mn

Abstract:

The effect of ageing temperature on damping capacity of the Cu-20.4Al-8.7Mn alloy at room temperature was investigated by internal friction measurements. The results indicated that damping capacity of the alloy exhibits a non-monotonous changing trend with ageing temperature. Ageing at lower temperature of less than 150oC, damping capacity rapidly increses even up to maximum of 0.01 with the increasing ageing temperature, the reason of which should relate with the increased amount of twin boundaries and phase interfaces between martensites due to the thinning and splitting of martensitic plates, whereas when the ageing temperature exceeds 150oC, the damping capacity trends to steeply decrease as the ageing temperature increases until close to a constant in last corresponding to the ageing at higher temperature due to the occurrence and complete finish of transformation of martensites to austenites.

• Periodical: Applied Mechanics and Materials (Volumes 268-270)
• Pages: 312-315
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.268-270.312
• Online since: December 2012
• Authors: Gang Ling Hao, Qiao Ping Xu, Wei Guo Wang
• Keywords: Aging, Cu-Al-Mn, Damping, Interface

References

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