Influence of shaft shoulder diameter on microstructure and properties of Ti-6Al-4V friction stir welding joint

Ma Shihui; Li Jiyuan

doi:10.7513/j.issn.1004-7638.2021.03.012

Volume 42 Issue 3

Jun. 2021

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Ma Shihui, Li Jiyuan. Influence of shaft shoulder diameter on microstructure and properties of Ti-6Al-4V friction stir welding joint[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 82-87. doi: 10.7513/j.issn.1004-7638.2021.03.012

Citation:

Ma Shihui, Li Jiyuan. Influence of shaft shoulder diameter on microstructure and properties of Ti-6Al-4V friction stir welding joint[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 82-87. doi: 10.7513/j.issn.1004-7638.2021.03.012

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Influence of shaft shoulder diameter on microstructure and properties of Ti-6Al-4V friction stir welding joint

doi: 10.7513/j.issn.1004-7638.2021.03.012

Ma Shihui^1
,,
Li Jiyuan²

1.
Qinghai Vocational and Technical College, Haidong 810700, Qinghai, China
2.
Qinghai University, Xining 810016, Qinghai, China

Received Date: 2020-04-16
Publish Date: 2021-06-10

Abstract

Abstract

As an important parameter for the stir head of friction stir welding (FSW), the diameter of the shaft shoulder has an effect on the microstructure and properties of the welded joints. The friction stir welding of Ti-6Al-4V titanium alloy with 2 mm thickness was carried out with different shaft shoulder diameters. The microstructure and mechanical properties were analyzed. The results show that when the diameter of the shoulder is at 8～14 mm, the grain in the nugget area of the Ti-6Al-4V FSW joint is first refined and then coarse, and the joint tensile strength and joint coefficient are first increased and then decreased. When the diameter of the shoulder is at 12 mm, the grain in the nugget area is the smallest with the average grain size of 7 μm, and the joint tensile strength and joint coefficient are the highest with the value at 929 MPa and 91% respectively.
- titanium alloy,
- Ti-6Al-4V,
- friction stir welding,
- shaft shoulder diameter,
- microstructure,
- mechanical properties

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References(8)

References

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