Enhanced elastocaloric effect and mechanical properties of Fe-doped Ni-Mn-Al ferromagnetic shape memory alloys

被引：36
作者：
Cao, Ting [1 ]
Xuan, Haicheng [1 ]
Liu, Shilong [1 ]
Wang, Libang [1 ]
Xie, Zhigao [1 ]
Liang, Xiaohong [1 ]
Chen, Fenghua [2 ]
Han, Peide [1 ]
Wang, Dunhui [3 ,4 ]
Du, Youwei [1 ]
机构：
[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Minist Educ, Key Lab Interface Sci & Engn Adv Mat, Taiyuan 030024, Shanxi, Peoples R China
[2] Taiyuan Univ Sci & Technol, Dept Phys, Taiyuan 030024, Shanxi, Peoples R China
[3] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[4] Nanjing Univ, Key Lab Nanomat Jiang Su Prov, Nanjing 210093, Jiangsu, Peoples R China
来源：
INTERMETALLICS | 2019年 / 112卷
基金：
中国国家自然科学基金;
关键词：
Ferromagnetic shape memory alloys; Martensitic transformation; Gamma phase; Elastocaloric effect; Mechanical properties; Ni-Fe-Mn-Al; FIELD-INDUCED STRAIN; MARTENSITIC-TRANSFORMATION; GIANT; MICROSTRUCTURE;
D O I：
10.1016/j.intermet.2019.106529
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The influence of Fe substitution for Ni on mechanical properties and elastocaloric effect (eCE) in Ni50-xFexMn32Al18 (x = 2, 3 and 4) ferromagnetic shape memory alloys (FSMAs) has been investigated. These alloys undergo a first-order martensitic transformation from B-2 (austenite) to Ll(0) (martensite) on the cooling process. As the Fe content increases, the martensitic transformation temperature shifts toward lower temperature region, and the amount of gamma phase increases gradually in Ni50-xFexMn32Al18 (x = 2, 3 and 4) alloys. Moreover, the maximum compressive strength (1147 MPa) is obtained in Ni46Fe4Mn32Al18 alloy. The application and removal stress of 300 MPa can produce a large adiabatic temperature change of about 5.1 K and no significant degradation of eCE after 30 stress cycles in Ni46Fe4Mn32Al18 alloy. These results show that Ni50-xFexMn32Al18 alloys would be the promising candidates for new multifunctional materials.
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页数：6
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