TiAl系合金和镍基高温合金连接技术研究进展

doi:10.11896/cldb.24100004

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Abstract With the continuous innovation of high-performance aero engine manufacturing materials and joining technology, Ni-based superalloys are widely concerned and successfully applied for their excellent high-temperature performance. TiAl based alloys have great potential for aerospace applications as new lightweight high-temperature materials. To fulfil the imperative demand of lightweight development, achieving a sound joining between TiAl based alloys and Ni-based superalloys is extremely necessary. In this paper, to overcome the welding difficulties caused by the differences in physical and chemical properties between these two metals, the microstructure, mechanical properties and fracture mechanisms of heterogeneous joints connected by different welding methods such as fusion welding, brazing, diffusion bonding and friction welding are reviewed. Among these welding methods, fusion welding is flexible and adaptable, but due to uneven heating and other problems, joints are vulne-rable to crack initiation, deteriorating mechanical properties. Brazing is an extensive welding method for two alloys, currently its filler metals are mainly designed as a multi-primary composition with the concept of high entropy, therefore the shear properties at room temperature have been close to the strength of the base metal. The research on diffusion bonding is mainly focused on the design of the interlayer and the establishment of the process window, etc. The joints are characterized by small welding deformation and high bonding strength, suitable for high joining precision and complex structures. Using the friction welding method, the welding interface is fine, without apparent cracks and other defects, howe-ver, the brittle phases generated at the interface will also deteriorate the mechanical properties. In summary, to solve the joining difficulties of TiAl based alloys and Ni-based superalloys, inhibiting the formation of brittle phases and ensuring sound metallurgical bonding is essential. Meanwhile, it is of great significance to promote the practical applications of the two alloys.

Key words： TiAl based alloy Ni-based superalloy microstructure mechanical property dissimilar metal welding

Published: 10 November 2025 Online: 2025-11-10

CLC number:

TG456

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	Articles by authors
	WANG Yinchen
	CHANG Yunfeng
	QIN Zhiwei
	ZHANG Liangliang
	DONG Honggang
	CHENG Yafang
	GUO Peng
	LI Peng

Cite this article:

WANG Yinchen,CHANG Yunfeng,QIN Zhiwei, et al. Research Progress on Heterogeneous Welding of Ni-based Superalloy and TiAl Based Alloy[J]. Materials Reports, 2025, 39(21): 24100004-15.

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https://www.mater-rep.com/EN/10.11896/cldb.24100004 OR https://www.mater-rep.com/EN/Y2025/V39/I21/24100004

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