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Indexed by:期刊论文

Date of Publication:2018-10-01

Journal:JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE

Included Journals:SCIE、CPCI-S

Volume:27

Issue:10,SI

Page Number:5551-5560

ISSN No.:1059-9495

Key Words:diffusion bonding; self-nanocrystallization; TiAl alloy; Ti alloy

Abstract:A self-nanocrystallization layer was prepared on the surface of a Ti alloy sample via shot peening to investigate its influence on the follow-up diffusion bonding between a titanium alloy and a TiAl-based alloy. The experiment results show that surface self-nanocrystallization treatment can accelerate the interface reaction between a Ti alloy and a TiAl alloy, lowering the bonding temperature of the sound joints by more than 50K. Moreover, the thickness of the interface reaction layer plays an important role in the interfacial bonding strength. In this work, the maximum shear strength of the joint appears to have a thickness of about 1.8m. As a consequence, it is found that surface self-nanocrystallization treatment is helpful for optimizing the diffusion bonding process.