Linear friction welding of Ti-6Al-4V alloy fabricated below β-phase transformation temperature

SCRIPTA MATERIALIA

卷:191

Article

Choi, Jeong-Won¹  Aoki, Yasuhiro¹  Ushioda, Kohsaku¹  Fujii, Hidetoshi¹ 

[1] Osaka Univ, Joining & Welding Res Inst, Osaka, Ibaraki 5670047, Japan

关键词: Interfacial temperature;    Microstructure;    Mechanical properties;    Linear friction welding (LFW);    Ti alloys;   

DOI  :  10.1016/j.scriptamat.2020.09.013

来源: Elsevier

【 摘 要 】

The interfacial temperature, microstructure and hardness distribution of the linear friction welded Ti-6Al-4V joints obtained at different applied pressures were investigated. The sound Ti-6Al-4V alloy joints were successfully fabricated below the beta-phase transformation temperature. The increased pressure considerably decreased the welding temperature. The dynamically recrystallized ultra-fined alpha equiaxed grains of 0.2 mu m were formed in the weld center of the joint by applying pressure of 550 MPa. Moreover, the hardness of the weld center was higher than that of the base material without the softened region in thermo-mechanical affected zone, which suggests the improved mechanical properties of the joints. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd.

【 授权许可】

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