Microstructure and corrosion properties of the laser cladding Al-TiC composite coating on AZ31 magnesium alloy

LIU Fenjun; NING Xiang; BAI Yanxia; SHEN Zhikang; CHEN Haiyan

doi:10.13801/j.cnki.fhclxb.20220410.002

Volume 40 Issue 2

Feb. 2023

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LIU Fenjun, NING Xiang, BAI Yanxia, et al. Microstructure and corrosion properties of the laser cladding Al-TiC composite coating on AZ31 magnesium alloy[J]. Acta Materiae Compositae Sinica, 2023, 40(2): 959-969. doi: 10.13801/j.cnki.fhclxb.20220410.002

Citation:

LIU Fenjun, NING Xiang, BAI Yanxia, et al. Microstructure and corrosion properties of the laser cladding Al-TiC composite coating on AZ31 magnesium alloy[J]. Acta Materiae Compositae Sinica, 2023, 40(2): 959-969. doi: 10.13801/j.cnki.fhclxb.20220410.002

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Microstructure and corrosion properties of the laser cladding Al-TiC composite coating on AZ31 magnesium alloy

doi: 10.13801/j.cnki.fhclxb.20220410.002

1.
College of Energy Engineering, Yulin University, Yulin 719000, China
2.
Yulin Key Laboratory of Metal Matrix Composites and Remanufacturing Technology, Yulin University, Yulin 719000, China
3.
School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, China
4.
School of Materials Science and Engineering, Northwestern Polytechnical University, Xi′an 710072, China

Funds: National Natural Science Foundation of China (51861034; 51974260); Technology Bureau of Yulin (CXY-2022-083; CXY-2020-006-01); Technology Bureau of Yulin High-tech Zone (CXY-2021-16); High-level Talent Project of Yulin University (20 GK06); Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy (YLU-DNL Fund 2021008); Innovation Team of Education Department of Shaanxi Provincial Government (22JP105)

Received Date: 2022-02-11
Accepted Date: 2022-03-29
Rev Recd Date: 2022-03-28

Available Online: 2022-04-12

Publish Date: 2023-02-15

Abstract

Abstract

In order to enhance the surface corrosion resistance of the AZ31 magnesium alloy, the defect-free Al-TiC composite coatings were prepared on AZ31 magnesium alloy using laser cladding technology. The influences of Al-TiC compositions with different contents on the phase composition, microstructure and corrosion resistance of the Al-TiC composite coatings were investigated. The results indicate that a large number of Al₁₂Mg₁₇, Mg₂Al₃ and TiC phases are produced in the Al-TiC composite coating. The microstructure of the composite coating characterizes as a continuous network distribution. With the decrease of the Al content in the composite powder, the contents of the Al₁₂Mg₁₇, Mg₂Al₃ and TiC phases in the composite coating gradually increase, and the network-like distribution characteristics of the microstructure in the composite coating become more uniform and continuous. In addition, a sound metallurgical bonding interface is prepared between the composite coating and the AZ31 substrate. The corrosion resistance of the Al-TiC composite coating prepared using the laser cladding technology is significantly enhanced compared to that of the AZ31 substrate. The self-corrosion potential increased from −1.563 V of the AZ31 substrate to −1.144 V of the Al-TiC composite coating, whereas the self-corrosion current decreased from 1.55×10⁻⁴ A to 2.63×10⁻⁶ A.
- laser cladding,
- Al-TiC composite coating,
- AZ31 alloy,
- microstructure,
- corrosion resistance
Long Abstrsct
Innovation Points

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References(31)

References

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