Improvement of Formation, Microstructure and Mechanical Properties of TIG Welded TC4 Titanium Alloy by Ultrasonic Coaxial Radiation

IF 2.9 2区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Acta Metallurgica Sinica-English Letters Pub Date : 2024-09-23 DOI:10.1007/s40195-024-01766-1

Yihao Gao, Boqiao Ren, Yunhao Chen, Xinchen Sui, Xiaohui Zhao, Chenglei Fan, Chao Chen

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Abstract

In this study, the effects of ultrasonic coaxial assisted TIG welding (U-TIG) on the formation, microstructure, and mechanical properties of TC4 titanium alloy welded joints were investigated. The results indicated that at optimal ultrasonic power and welding current settings, remarkable improvements of welded joint were observed. Specifically, the weld depth-to-width ratio increased by 267% compared to conventional TIG welding, reaching 0.22. Furthermore, the microhardness of the welded seam increased by 53%, reaching 550.1 HV, while the tensile strength of the welded joint rose to 1197.7 MPa, representing a 12.2% enhancement. The compressing effect of ultrasound concentrates the energy of the arc, thereby improving the penetration depth of the welded seam. In addition, ultrasonic cavitation plays a crucial role in refining the grain structure of the weld seam, consequently enhancing its strength.

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超声波同轴辐射改善 TIG 焊接 TC4 钛合金的成形、显微组织和机械性能

本研究探讨了超声波同轴辅助氩弧焊（U-TIG）对 TC4 钛合金焊接接头的形成、微观结构和机械性能的影响。结果表明，在最佳超声波功率和焊接电流设置下，焊接接头有显著改善。具体来说，与传统的氩弧焊相比，焊缝深度与宽度比增加了 267%，达到 0.22。此外，焊缝的显微硬度提高了 53%，达到 550.1 HV，而焊接接头的抗拉强度则提高到 1197.7 MPa，提高了 12.2%。超声波的压缩效应集中了电弧的能量，从而提高了焊缝的穿透深度。此外，超声波空化在细化焊缝晶粒结构方面发挥了重要作用，从而提高了焊缝强度。

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来源期刊

Acta Metallurgica Sinica-English Letters METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

6.60

自引率

14.30%

发文量

122

审稿时长

2 months

期刊介绍： This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.