Microstructure and properties of electron beam welded TA1 medium plate and analysis of joint strengthening

Bai Wei; Li Dadong; Dong Xuejiao; Chen Rong

doi:10.7513/j.issn.1004-7638.2021.06.025

Volume 42 Issue 6

Dec. 2021

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Bai Wei, Li Dadong, Dong Xuejiao, Chen Rong. Microstructure and properties of electron beam welded TA1 medium plate and analysis of joint strengthening[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 171-177. doi: 10.7513/j.issn.1004-7638.2021.06.025

Citation:

Bai Wei, Li Dadong, Dong Xuejiao, Chen Rong. Microstructure and properties of electron beam welded TA1 medium plate and analysis of joint strengthening[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 171-177. doi: 10.7513/j.issn.1004-7638.2021.06.025

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Microstructure and properties of electron beam welded TA1 medium plate and analysis of joint strengthening

doi: 10.7513/j.issn.1004-7638.2021.06.025

Pangang Group Research Institute Co., Ltd., State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China

Received Date: 2021-07-06
Publish Date: 2021-12-31

Abstract

Abstract

Electron beam welding was used to weld 30 mm thick TA1 pure titanium plates. Combined with optical microscope (OM) and electron backscatter diffraction (EBSD), the microstructure, Vickers hardness and tensile test of the joint were carried out. The influence of welding process on microstructure and mechanical properties of TA1 material and the strengthening reason of the joint were analyzed. The results show that the microstructure from TA1 base metal to weld metal changes from equiaxed α to serrated α. The strength and hardness of welding seam and the heat affected zone are higher than the base metal. The strengthening of the joint properties is related to the increasing effect of serrated α and acicular α martensite on the hardness, the existence of a large number of serrated α lower than the grain size of the base metal in the weld seam and heat-affected zone, and the refining effect of micro-twinning on the welding microstructure.
- TA1,
- electron beam welding,
- microstructures,
- mechanical properties

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References(18)

References

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