Enhancing elastocaloric performance: Ti-doped Co-V-Ga bulk polycrystalline alloys with minimal stress hysteresis

doi:10.1016/j.jmrt.2024.06.174

IMR OpenIR

	Enhancing elastocaloric performance: Ti-doped Co-V-Ga bulk polycrystalline alloys with minimal stress hysteresis
	Yang, Jie 1; Tan, Changlong 1; Liu, Rui 2; Wang, Xiaochuan 1; Tian, Xiaohua 3; Zhao, Lei 1; Zhang, Kun 4
通讯作者	Tan, Changlong(changlongtan@hrbust.edu.cn) ; Tian, Xiaohua(xiaohuatian@hrbust.edu.cn) ; Zhang, Kun(kzhang@imr.ac.cn)
	2024-07-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	31 页码:1813-1825
摘要	Currently, practical applications of shape memory alloy (SMA) solid elastocaloric refrigeration materials are limited by low elastocaloric effect (eCE), high applied stress, and large stress hysteresis (Delta sigma hys). Here, we introduce a composition design strategy using Ti-doped Co-V-Ga SMAs to address these challenges. We combine first-principles calculations and experiments to verify this strategy. Our results show that the lattice distortion caused by the significant difference in atomic radius after Ti doping produces a solid solution strengthening effect inside the alloy, which significantly improves the superelasticity of the alloy, delays the plastic deformation of the austenite phase, and the volume fraction of martensitic transformation increases significantly. The newly developed Co51.7V31.3Ga16Ti1 bulk polycrystalline alloy exhibits a remarkable adiabatic temperature change (Delta Tad) of -10 K at room temperature under a low stress of 400 MPa, a minimum Delta sigma hys of 18 MPa, and a high coefficient of performance COPmat of 31.9. Importantly, the 100-cycle loading-unloading test at 350 MPa is done, and it reveals that the Delta Tad for the Ti0 alloy was only 3.9 K, while it reached 6.2 K for the Ti1 alloy, marking a noteworthy 59 % performance enhancement. From the simplicity of the fabrication process to the comprehensive performance of the material, it exhibits a promising advantage for practical cooling applications This study presents a feasible design strategy for large-scale production of high-performance bulk polycrystalline alloys with high eCE, low stress, and Delta sigma hys.
关键词	Elastocaloric effect Shape memory alloy Co-V-Ga alloy Stress hysteresis Ti doping
资助者	National Natural Science Foundation of China ; Hei- longjiang Provincial Natural Science Foundation of China
DOI	10.1016/j.jmrt.2024.06.174
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52271172] ; National Natural Science Foundation of China[52001101] ; National Natural Science Foundation of China[51971085] ; Hei- longjiang Provincial Natural Science Foundation of China[YQ2022112]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001264172100001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/188174
专题	中国科学院金属研究所
通讯作者	Tan, Changlong; Tian, Xiaohua; Zhang, Kun
作者单位	1.Harbin Univ Sci & Technol, Sch Mat Sci & Chem Engn, Harbin 150080, Peoples R China 2.Harbin Univ Sci & Technol, Sch Sci, Harbin 150080, Peoples R China 3.Harbin Univ Sci & Technol, Sch Elect & Elect Engn, Harbin 150080, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Yang, Jie,Tan, Changlong,Liu, Rui,et al. Enhancing elastocaloric performance: Ti-doped Co-V-Ga bulk polycrystalline alloys with minimal stress hysteresis[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,31:1813-1825.
APA	Yang, Jie.,Tan, Changlong.,Liu, Rui.,Wang, Xiaochuan.,Tian, Xiaohua.,...&Zhang, Kun.(2024).Enhancing elastocaloric performance: Ti-doped Co-V-Ga bulk polycrystalline alloys with minimal stress hysteresis.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,31,1813-1825.
MLA	Yang, Jie,et al."Enhancing elastocaloric performance: Ti-doped Co-V-Ga bulk polycrystalline alloys with minimal stress hysteresis".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 31(2024):1813-1825.