冷却速率对CuAlNi形状记忆合金阻尼行为的影响

doi:10.11896/cldb.21090026

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Abstract Cu-based shape memory alloy as a kind of important damping material has wide objective demands. Its high damping capacity near room-temperature of alloy is directly associated with the application and has gained special attention. In this paper, Cu-27.5Al-3.5Ni (at%) shape memory alloy was prepared by powder metallurgy. The microstructure of the alloy was controlled by changing the cooling mode. A typical internal friction peak was observed in the water-cooling and air-cooling samples, which moved towards lower temperature region near room temperature with the increase of cooling rate. It is rationalized that the internal friction peak is originated with the reverse martensitic transformation. The absence of internal friction peak in furnace cooling samples is attributed to the eutectoid decomposition of the material at high temperature and thus no martensitic phase formation. Compared with furnace-cooled and air-cooled samples, water-cooled samples can obtain higher damping capacity at room temperature range, which is related to the increase of numbers of martensite strips and interface amount between martensite and austenite.

Key words： CuAlNi shape memory alloy damping property reverse martensitic transformation cooling rate

Published: Online: 2023-01-03

CLC number:

TG139.6

Fund:National Natural Science Foundation of China (52061038, 51661032, 51301150), the Special Program of Youth New-star of Science and Technology of Shaanxi Province, China (2013KJXX-11), Special Project for Regional Development Talents of “Special Support Plan” of Shaanxi Province (2020-44), and Graduate Education Innovation Program of Yan'an University(YCX2021061).

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	Articles by authors
	LEI Bo
	HAO Gangling
	LI Yuchuan
	WANG Jin

Cite this article:

LEI Bo,HAO Gangling,LI Yuchuan, et al. Effect of Cooling Rates on Damping Behavior of CuAlNi Shape Memory Alloy[J]. Materials Reports, 2022, 36(24): 21090026-4.

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http://www.mater-rep.com/EN/10.11896/cldb.21090026 OR http://www.mater-rep.com/EN/Y2022/V36/I24/21090026

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