Microstructure and properties of architectural TiAl alloy with heat treatment after welding

Liao Chenya; Li Shuxun

doi:10.7513/j.issn.1004-7638.2021.06.027

Volume 42 Issue 6

Dec. 2021

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Liao Chenya, Li Shuxun. Microstructure and properties of architectural TiAl alloy with heat treatment after welding[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 184-190. doi: 10.7513/j.issn.1004-7638.2021.06.027

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Liao Chenya, Li Shuxun. Microstructure and properties of architectural TiAl alloy with heat treatment after welding[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 184-190. doi: 10.7513/j.issn.1004-7638.2021.06.027

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Microstructure and properties of architectural TiAl alloy with heat treatment after welding

doi: 10.7513/j.issn.1004-7638.2021.06.027

Sichuan Water Conservancy Vocational College, Sichuan Water Conservancy Innovation and Development Research Institute, Chengdu 611830, Sichuan, China

Received Date: 2021-06-01
Publish Date: 2021-12-31

Abstract

Abstract

In this paper, two kinds of heat treatment were carried out on the electron beam welded joints of architectural TiAl alloy. The microstructure of different areas of the joints was analyzed with metallographic microscope (OM), and the microhardness of the welded joints was tested. The influences of the heat treatment processes on the microstructure and hardness of the welded joints of the architectural TiAl alloy were analyzed. The results show that the weld structure of TiAl alloy is composed of α₂ phase, B phase and O phase. The area with higher hardness of the joint increases, but the overall trend is down after the local heat treatment. After heat treatment, the B2 phase size of TiAl alloy reduces, while the O phase plate decomposed from B2 phase becomes large. The overall microhardness of the welded joint is reduced after integral heat treatment. The microhardness of the weld zone can be reduced by two heat treatment methods, and it presents a stable distribution.
- architectural TiAl alloy,
- electron beam welding,
- joints,
- heat treatment,
- microstructure,
- hardness

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References(18)

References

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