首页|Experimental Study on Residual Stresses of Al_2O_3 Coating by Laser Re-melting

Experimental Study on Residual Stresses of Al_2O_3 Coating by Laser Re-melting

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  • Trans Tech Publications Ltd
The surface of Al_2O_3 coating sprayed on 40Cr substrate was re-melted with high power continuous CO_2 laser, and its micro-hardness and residual stresses were measured, respectively. The strengthening mechanism of Al_2O_3 coating by laser re-melting was analyzed and discussed. The experimental results shown that the surface of Al_2O_3 coating by laser re-melting is neat and smooth, and its compositions are even, its structures are compact, and Al_2O_3 coating is evenly distributed in its surface with grain forms, and its micro-hardness increases about 200%; Residual stress of Al_2O_3 coating by laser re-melting is changed into compressive stress from tensile stress, which is benefit to improving bonding strength of coating-substrate interface.

Al_2O_3 coatinglaser re-meltingbonding strengthx-ray diffraction (XRD)residual stress

Dejun Kong、Kaiyu Luo、Hong Miao

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College of Mechanical & Energy Engineering, Jiangsu Polytechnic University, Changzhou, P.R.China, 213016

School of Mechanical Engineering, Jiangsu University, Zhenjiang, P.R. China, 212013

College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, P.R. China, 210016

2010

10.4028/www.scientific.net/KEM.431-432.446

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.431/432
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