Study on the microstructure and mechanical properties of the automotive titanium alloy based on friction stir processing

Li Shasha; Wang Lei; Lv Xinrui; Yu Lili

doi:10.7513/j.issn.1004-7638.2022.03.012

Volume 43 Issue 3

Jun. 2022

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Li Shasha, Wang Lei, Lv Xinrui, Yu Lili. Study on the microstructure and mechanical properties of the automotive titanium alloy based on friction stir processing[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 71-76. doi: 10.7513/j.issn.1004-7638.2022.03.012

Citation:

Li Shasha, Wang Lei, Lv Xinrui, Yu Lili. Study on the microstructure and mechanical properties of the automotive titanium alloy based on friction stir processing[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 71-76. doi: 10.7513/j.issn.1004-7638.2022.03.012

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Study on the microstructure and mechanical properties of the automotive titanium alloy based on friction stir processing

doi: 10.7513/j.issn.1004-7638.2022.03.012

Li Shasha^1
,,
Wang Lei^{1
,
,},
Lv Xinrui¹,
Yu Lili²

1.
Cangzhou Technical College, Cangzhou 061001, Hebei, China
2.
School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050035, Hebei, China

Received Date: 2021-12-22
Publish Date: 2022-06-30

Abstract

Abstract

In this investigation, the friction stir processing (FSP) method was used to modify the surface layer of an as-cast Ti8LC automotive titanium alloy using different spindle rotation speeds and travel speeds. In addition, the microstructure and mechanical properties of the alloy samples were tested and compared. The results show that the internal grains of the alloy are refined, and the uniformity of microstructure distribution and the mechanical properties are improved after FSP modification. When the shoulder depression is 0.2 mm, and the spindle inclination angle is 2.5°, the spindle rotation speed increases from 200 r/min to 400 r/min or travel speed from 30 mm/s to 90 mm/s. Meanwhile, the grains of FSP alloy samples are refined first and then coarsened, and the mechanical properties are improved first and then decreased. The best mechanical properties of the modified alloy samples can be obtained with the spindle rotation speed of 300 r/min and the travel speed of 60 mm/s. The tensile strength, yield strength and elongation are 1 046, 729 MPa and 12.7%, respectively. Compared with the as-cast Ti8LC automotive titanium alloy, the tensile strength and yield strength of FSP modified alloy samples are increased by 118 MPa and 125 MPa (with a 12.7% and 20.7% amplitude), respectively.
- automotive titanium alloy,
- Ti8LC,
- friction stir processing (FSP),
- microstructure,
- mechanical property

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References(12)

References

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