Experimental Study on Testing Ni-Containing Stainless Steel Protective Coatings by Pulsed Laser Scratching

Abstract:

In the experiment, we use pulsed laser to conduct discrete scratching on Ni-containing stainless steel protective coatings to test residual stress situation after the matrix is scratched; then to analyze the the impact of the impact stress wave on coating - substrate bonding strength according to the test results, finally to infer the laser power density range within which it occurs coating failure. The study shows that: after laser discrete scratching, the residual stress of the center of the laser-loaded point on matrix surface gradually reduces when the pulsed laser power density increases. The matrix produces a corresponding residual compressive stress under the laser power density reaches a certain value. The actual failure threshold values are 12.006 GW/cm2, 11.829GW/cm2 and 12.193GW/cm2 measured by the three-dimensional topography instrument testing the discrete scratch point of three groups of samples and verified by using a microscope

• Periodical: Applied Mechanics and Materials (Volume 43)
• Pages: 651-656
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.43.651
• Online since: December 2010
• Authors: Ai Xin Feng, Yu Peng Cao, Chuan Chao Xu, Huai Yang Sun, Gui Fen Ni, Jun Wei Wang, Peng Chen Zhou
• Keywords: Coating, Laser Discrete Scratching, Laser Technology

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