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Proceedings Paper

Laser Surface Melting Of Stainless Steel For Corrosion Protection
Author(s): T. R. Anthony; H. E. Cline
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Paper 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.

Paper Details

Date Published: 24 January 1980
PDF: 10 pages
Proc. SPIE 0198, Laser Applications in Materials Processing, (24 January 1980); doi: 10.1117/12.958024
Show Author Affiliations
T. R. Anthony, General Electric Research and Development Center (United States)
H. E. Cline, General Electric Research and Development Center (United States)

Published in SPIE Proceedings Vol. 0198:
Laser Applications in Materials Processing
John F. Ready, Editor(s)

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