Experimental Study on Residual Stresses of Al2O3 Coating by Laser Re-Melting


Article Preview

The surface of Al2O3 coating sprayed on 40Cr substrate was re-melted with high power continuous CO2 laser, and its micro-hardness and residual stresses were measured, respectively. The strengthening mechanism of Al2O3 coating by laser re-melting was analyzed and discussed. The experimental results shown that the surface of Al2O3 coating by laser re-melting is neat and smooth, and its compositions are even, its structures are compact, and Al2O3 coating is evenly distributed in its surface with grain forms, and its micro-hardness increases about 200%; Residual stress of Al2O3 coating by laser re-melting is changed into compressive stress from tensile stress, which is benefit to improving bonding strength of coating-substrate interface.



Key Engineering Materials (Volumes 431-432)

Edited by:

Yingxue Yao, Dunwen Zuo and Xipeng Xu




D. J. Kong et al., "Experimental Study on Residual Stresses of Al2O3 Coating by Laser Re-Melting", Key Engineering Materials, Vols. 431-432, pp. 446-449, 2010

Online since:

March 2010




[1] Y.Z. Yang, Z.Y. Liu and Y.Z. Zhuang: Ordnance Material Science and Engineering Vol. 23 (2000), p.7.

[2] J.H. Zhang, Z.J. Tian and J.F. Zhao: Laser Journal, Vol. 25 (2004), p.76.

[3] C.Z. Chen: Journal of the Chinese Ceramic Society, Vol. 28 (2000), p.133.

[4] S.H. Si, X.M. Yuan and Y.J. He: Journal of East China University of Metallargy, Vol. 19 (2002), p.189.

[5] W.P. Zhang, S. Liu, Y.T. Ma and et al: Transactions of Materids and Heat Treatment, Vol. 26 (2005), p.70.

[6] L.Y. Zhou and J.C. Tian: New Technology & New Process, Vol. 29 (2007), p, 81.

[7] X.H. Yang and Q. Sun: Research & Progress of SSE, Vol. 9 (1989), p.186.

[8] Y. Liu, S.R. Yu and L.Q. Ren: Journal of Jilin University of Technology, Vol. 34 (2004), p.392.

Fetching data from Crossref.
This may take some time to load.