The improvement of the shape memory effect of Cu-13.5Al–4Ni high-temperature shape memory alloys through Cr-, Mo-, or V-alloying

Lipeng Guo; Feng Chen; Shuaishuai Chen; Yixiong Huang; Jinbin Zhang; Cuiping Wang; Shuiyuan Yang

Journal of Science: Advanced Materials and Devices (Jun 2023)

The improvement of the shape memory effect of Cu-13.5Al–4Ni high-temperature shape memory alloys through Cr-, Mo-, or V-alloying

Lipeng Guo,
Feng Chen,
Shuaishuai Chen,
Yixiong Huang,
Jinbin Zhang,
Cuiping Wang,
Shuiyuan Yang

Affiliations

Lipeng Guo: College of Materials of Xiamen University, Xiamen 361005, Shenzhen Research Institute of Xiamen University, Shenzhen 518055, China; Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, China
Feng Chen: College of Materials of Xiamen University, Xiamen 361005, Shenzhen Research Institute of Xiamen University, Shenzhen 518055, China; Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, China
Shuaishuai Chen: College of Materials of Xiamen University, Xiamen 361005, Shenzhen Research Institute of Xiamen University, Shenzhen 518055, China; Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, China
Yixiong Huang: Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, China
Jinbin Zhang: College of Materials of Xiamen University, Xiamen 361005, Shenzhen Research Institute of Xiamen University, Shenzhen 518055, China; Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, China; Corresponding author. College of Materials of Xiamen University, Xiamen 361005, Shenzhen Research Institute of Xiamen University, Shenzhen 518055, China.
Cuiping Wang: Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, China
Shuiyuan Yang: College of Materials of Xiamen University, Xiamen 361005, Shenzhen Research Institute of Xiamen University, Shenzhen 518055, China; Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, China; Corresponding author. College of Materials of Xiamen University, Xiamen 361005, Shenzhen Research Institute of Xiamen University, Shenzhen 518055, China.

Journal volume & issue: Vol. 8, no. 2
p. 100532

Abstract

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This study presents the effect of small additions of Cr, Mo, or V on the microstructure, crystallographic features of martensitic transformation, and shape memory effect of Cu-13.5Al–4Ni master alloy. The results show that the studied alloys consist of dominant β'1 (18R) martensitic structure and fine bcc precipitates, which are riched in the alloying elements but poor in the Cu content. The martensitic transformation starts temperatures of the alloys are 414K, 385K, and 394K when X = 0.5Cr, 0.5Mo, or 0.5V, respectively. More importantly, a drop in grain size was achieved in the studied alloys, which improved the shape memory effect in Cu-13.5Al–4Ni alloys. As a result, the studied alloys exhibit a steady increase of shape memory effect as the pre-strain changed from 6% to 10%, which the maximum shape memory effect reaching 6.2%, 5.8%, and 5.5% for X = 0.5Cr, 0.5Mo, and 0.5V, respectively.

Published in Journal of Science: Advanced Materials and Devices

ISSN: 2468-2284 (Print); 2468-2179 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/journal-of-science-advanced-materials-and-devices

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