Vacuum brazing of Al0.3CoCrFeNi high-entropy alloys with CoCrFeNiNb0.5 eutectic filler metal for wide-temperature range application

被引：0
|
作者：
Lei, Y. [1 ,2 ]
Li, Y. N. [1 ]
Cai, Y. C. [1 ]
Wang, X. Y. [3 ]
Hu, S. P. [3 ]
Song, X. G. [3 ]
Chen, Z. B. [4 ]
Shi, H. C. [5 ]
机构：
[1] Qingdao Univ Technol, Sch Mech & Automot Engn, Qingdao 266000, Peoples R China
[2] Qingdao Univ Technol, Key Lab Ind Fluid Energy Conservat & Pollut Contro, Minist Educ, Qingdao 266520, Peoples R China
[3] Harbin Inst Technol, Natl Key Lab Precis Welding & Joining Mat & Struct, Harbin 150001, Peoples R China
[4] Harbin Engn Univ, Yantai Res Inst, Yantai 264006, Peoples R China
[5] Shanghai Univ Engn Sci, Sch Mat Sci & Engn, Shanghai 201620, Peoples R China
来源：
VACUUM | 2024年 / 230卷
基金：
中国国家自然科学基金;
关键词：
High-entropy alloys; Filler metals; Metallurgical compatibility; Shear strength; MECHANICAL-PROPERTIES; MICROSTRUCTURE; STRENGTH; DUCTILITY; JOINT;
D O I：
10.1016/j.vacuum.2024.113670
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The service conditions of high-entropy alloys (HEAs) joints brazed with conventional filler metals (FMs) can be confined because few HEAs phases generate in the braze zone. In this study, a multicomponent CoCrFeNiNb0.5 eutectic HEAs (EHEAs) FM was developed to braze Al0.3CoCrFeNi HEAs in vacuum, the braze zone mainly consisted of face-centered cubic (FCC) and Laves lamellar structure, exhibiting a superior metallurgical compatibility with the Al0.3CoCrFeNi base metals (BMs). The shear strength and shear displacement of brazed joints reached 461 MPa/1.35 mm at room temperature (RT), 741 MPa/1.42 mm at -196 degrees C and 380 MPa/1.62 mm at 700 degrees C, respectively. This strategy can stimulate the fabrication and wide-temperature range applications of HEAs brazed components by exploiting the structural and performance merits of EHEAs FMs.
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页数：8
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