Interfacial microstructure and shear properties of vacuum brazing TiAl alloy/316L stainless steel joint with Zr-Cu-Ni amorphous filler metal

YANG Yuesen; DONG Honggang; WU Baosheng; LI Peng; YANG Jiang; MA Yueting

doi:10.11868/j.issn.1001-4381.2021.000684

Cailiao gongcheng (May 2022)

Interfacial microstructure and shear properties of vacuum brazing TiAl alloy/316L stainless steel joint with Zr-Cu-Ni amorphous filler metal

YANG Yuesen,
DONG Honggang,
WU Baosheng,
LI Peng,
YANG Jiang,
MA Yueting

Affiliations

YANG Yuesen: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
DONG Honggang: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
WU Baosheng: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
LI Peng: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
YANG Jiang: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
MA Yueting: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

DOI: https://doi.org/10.11868/j.issn.1001-4381.2021.000684
Journal volume & issue: Vol. 50, no. 5
pp. 52 – 61

Abstract

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Vacuum brazing of TiAl alloy and 316L stainless steel (SS) was conducted using Zr-42.9Cu-21.4Ni amorphous filler metal. The effect of brazing temperature and brazing time on the microstructure and shear properties of the dissimilar metal joints between TiAl alloy and 316L stainless steel was investigated. The results show that the interface of the brazed joint can be divided into six different reaction layers. The microstructure of the brazed joints from TiAl alloy to 316L stainless steel at 1040 ℃/10 min is γ(TiAl)+AlCuTi/α2(Ti3Al)+AlCuTi/AlCu+ZrCuNi+FeZr/Cu8Zr3+ZrCuNi+TiFe+Fe2Zr/FeZr+Fe2Zr+TiFe2+ZrCu/α-(Fe, Cr). With the increase of brazing temperature, the shear strength of brazed joints increase first and then decrease. The maximum shear strength of 162 MPa is obtained at 1040 ℃/25 min. Fracture analysis indicates that cracks initiate at the interface of FeZr+Fe2Zr+TiFe2+ZrCu, and then propagate along Cu8Zr3+ZrCuNi+TiFe+Fe2Zr and α-(Fe, Cr) with cleavage fracture pattern.

Published in Cailiao gongcheng

ISSN: 1001-4381 (Print)
Publisher: Journal of Materials Engineering
Country of publisher: China
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: http://jme.biam.ac.cn/CN/1001-4381/home.shtml

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