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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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