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Appl. Sci. 2018, 8(6), 920; https://doi.org/10.3390/app8060920

Brazing Ti-48Al-2Nb-2Cr Alloys with Cu-Based Amorphous Alloy Filler

1
School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu 241000, China
2
Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FIN-90014 Oulu, Finland
3
School of Mechanical Engineering, Anhui Machine and Electricity College, Wuhu 241002, China
4
School of Mechanical Engineering, Quzhou University, Quzhou 324000, China
5
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
*
Authors to whom correspondence should be addressed.
Received: 4 May 2018 / Revised: 25 May 2018 / Accepted: 30 May 2018 / Published: 4 June 2018
(This article belongs to the Special Issue Bulk Metallic Glasses and Their Composites)
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Abstract

In this work, the Ti-48Al-2Nb-2Cr (at. %) alloy was successfully brazed using a Cu-based amorphous filler in 600 s under varied brazing temperatures. The element diffusion, microstructure, and precipitation phase of the joints are analyzed in detail, and the formation schemes are discussed. Reaction products in the joints are found as AlCuTi, Ti2Al, α-Ti, and (Ti,Zr)2(Cu,Ni). The interfacial microstructures varied subjected to the brazing temperature, while the shear strength of the joint firstly increased, and then accordingly decreased. The maximum shear strength of 266 MPa was reached under a brazing temperature of 1213 K and a holding time of 600 s. A formation mechanism was proposed to explain the shear strength variation following the width and amount of brittle compounds in the interfacial reaction layer. View Full-Text
Keywords: Ti-48Al-2Nb-2Cr alloy; amorphous alloy filler; brazing; microstructure; shear strength Ti-48Al-2Nb-2Cr alloy; amorphous alloy filler; brazing; microstructure; shear strength
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Wang, G.; Wu, P.; Wang, W.; Zhu, D.; Tan, C.; Su, Y.; Shi, X.; Cao, W. Brazing Ti-48Al-2Nb-2Cr Alloys with Cu-Based Amorphous Alloy Filler. Appl. Sci. 2018, 8, 920.

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