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Achieving refined overlay microstructure of a zn-55al-3mg-1.5si coating using high power diode laser (hpdl) surface treatment

Journal Article


Abstract


  • A high power diode laser (HPDL) was successfully used as a surface modifying approach on a hot dip process simulator (HDPS) Zn-55Al- 3Mg-1.5Si coating. The overlay microstructure was drastically refined owing to the rapid cooling rate of the laser radiation process, in which the size of α-Al dendrite was shrunk to less than 1/10 of the original. The laser also varied the solidifying path and yielded different phases in the interdendritic areas leading to modifications including, rare Si, disappearance of MgZn2 and nucleation of the Q phase. The modified Zn-55Al- 3Mg-1.5Si coating induced by HPDL surface treatment is assumed to make a contribution to the improvement of the corrosion resistance.

Publication Date


  • 2021

Citation


  • Peng, C. T., Forthan, M. U., Chen, Z., Liu, Q., Nolan, D., Li, H., . . . Luo, R. (2021). Achieving refined overlay microstructure of a zn-55al-3mg-1.5si coating using high power diode laser (hpdl) surface treatment. Lasers in Engineering, 50(4-6), 235-243.

Scopus Eid


  • 2-s2.0-85111778381

Start Page


  • 235

End Page


  • 243

Volume


  • 50

Issue


  • 4-6

Abstract


  • A high power diode laser (HPDL) was successfully used as a surface modifying approach on a hot dip process simulator (HDPS) Zn-55Al- 3Mg-1.5Si coating. The overlay microstructure was drastically refined owing to the rapid cooling rate of the laser radiation process, in which the size of α-Al dendrite was shrunk to less than 1/10 of the original. The laser also varied the solidifying path and yielded different phases in the interdendritic areas leading to modifications including, rare Si, disappearance of MgZn2 and nucleation of the Q phase. The modified Zn-55Al- 3Mg-1.5Si coating induced by HPDL surface treatment is assumed to make a contribution to the improvement of the corrosion resistance.

Publication Date


  • 2021

Citation


  • Peng, C. T., Forthan, M. U., Chen, Z., Liu, Q., Nolan, D., Li, H., . . . Luo, R. (2021). Achieving refined overlay microstructure of a zn-55al-3mg-1.5si coating using high power diode laser (hpdl) surface treatment. Lasers in Engineering, 50(4-6), 235-243.

Scopus Eid


  • 2-s2.0-85111778381

Start Page


  • 235

End Page


  • 243

Volume


  • 50

Issue


  • 4-6