Effects of aging and thermal cycling on the microstructure and damping behaviors of a porous CuAlMn shape memory alloy

Qian Wang; Liwei Wang; Jie Kang; Qingzhou Wang; Chunxiang Cui; Ru Su; Balaji Narayanaswamy

Journal of Materials Research and Technology (Jul 2020)

Effects of aging and thermal cycling on the microstructure and damping behaviors of a porous CuAlMn shape memory alloy

Qian Wang,
Liwei Wang,
Jie Kang,
Qingzhou Wang,
Chunxiang Cui,
Ru Su,
Balaji Narayanaswamy

Affiliations

Qian Wang: Hebei Key Laboratory of Material Near-Net Forming Technology, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
Liwei Wang: Hebei Key Laboratory of Material Near-Net Forming Technology, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
Jie Kang: Hebei Key Laboratory of Material Near-Net Forming Technology, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
Qingzhou Wang: Key Lab. for New Type of Functional Materials in Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Chunxiang Cui: Key Lab. for New Type of Functional Materials in Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Ru Su: Hebei Key Laboratory of Material Near-Net Forming Technology, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China; State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China; Corresponding author.
Balaji Narayanaswamy: School of Engineering, University of Waikato, Hamilton, New Zealand

Journal volume & issue: Vol. 9, no. 4
pp. 7020 – 7026

Abstract

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Effects of aging and thermal cycling on the microstructure and damping behaviors of a porous CuAlMn shape memory alloy (SMA) were studied. It was found that with increasing aging temperature the intensity of the internal friction peak initially increased, followed by a decrease in the reverse martensitic transformation. In addition, the peak position shifted from low temperature to high temperature. This phenomenon has been ascribed to the refinement of martensitic laths as well as the annihilation of the quenched-in vacancies. The process of thermal cycling was also found to influence the damping behaviors of porous CuAlMn SMA. For instance, the damping behaviors of the alloys at ambient temperatures were observed to gradually increase, when subjected to 10 thermal cycles. However, when the thermal cycles exceeded above 20, the damping capacity began to decrease due to the newly generated dislocations and the disappearance of the spear-shaped martensite phase.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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