Surface normalization of sensitized stainless steel by laser surface melting
作者:
T. R. Anthony,
H. E. Cline,
期刊:
Journal of Applied Physics
(AIP Available online 1978)
卷期:
Volume 49,
issue 3
页码: 1248-1255
ISSN:0021-8979
年代: 1978
DOI:10.1063/1.325015
出版商: AIP
数据来源: AIP
摘要:
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&percent; also showed laser surface melting to indefinitely extend specimen life in a stress corrosion environment. At strains greater than 15&percent;, 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.
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