Laser Surface Melting Of Stainless Steel For Corrosion Protection

T. R. Anthony; H. E. Cline

doi:10.1117/12.958024

24 January 1980 Laser Surface Melting Of Stainless Steel For Corrosion Protection

T. R. Anthony, H. E. Cline

Proceedings Volume 0198, Laser Applications in Materials Processing; (1980) https://doi.org/10.1117/12.958024
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

A scanning laser beam was used to melt and normalize the surface layer of sensitized 304 stainless steel. Subsequent Strauss tests indicated a complete resistance to intergranular corrosion. Mechanical testing at strains less than 15% also showed laser surface melting to indefinitely extend specimen life in a stress corrosion environment. At strains greater than 15%, the laser-scanned protective layer was breached by cracks. A maximum critical laser-scanning velocity compatible with normalization of the surface layer is calculated. Similarly, a minimum critical laser-scanning velocity required to avoid resensitization is determined. The stress distribution in a 304 stainless-steel specimen with a laser-melted and self-quenched surface layer is estimated and shown to be compatible with the observed appearance of martensite in the melted surface layer.

Citation Download Citation

T. R. Anthony and H. E. Cline "Laser Surface Melting Of Stainless Steel For Corrosion Protection", Proc. SPIE 0198, Laser Applications in Materials Processing, (24 January 1980); https://doi.org/10.1117/12.958024

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