Comparison of Stress Corrosion Cracking Susceptibility of Laser Machined and Milled 304 L Stainless Steel

Machining of austenitic stainless steel components is known to introduce significant enhancement in their susceptibility to stress corrosion cracking. The paper compares stress corrosion cracking susceptibility of laser machined 304 L stainless steel specimens with conventionally milled counterpart...

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Bibliographic Details
Published in:Lasers in manufacturing and materials processing 2016-12, Vol.3 (4), p.191-203
Main Authors: Gupta, R. K., Kumar, Aniruddha, Nagpure, D. C., Rai, S. K., Singh, M. K., Khooha, Ajay, Singh, A. K., Singh, Amrendra, Tiwari, M. K., Ganesh, P., Kaul, R., Singh, B.
Format: Article
Language:English
Subjects:
Accelerated tests
Austenitic stainless steels
Compressive properties
Corrosion
Corrosion rate
Corrosion tests
Crack initiation
Engineering
Ferrite
Industrial and Production Engineering
Lasers
Machines
Machining
Magnesium chloride
Manufacturing
Processes
Stainless steel
Stress corrosion cracking
Surfaces and Interfaces
Thin Films
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Summary:Machining of austenitic stainless steel components is known to introduce significant enhancement in their susceptibility to stress corrosion cracking. The paper compares stress corrosion cracking susceptibility of laser machined 304 L stainless steel specimens with conventionally milled counterpart in chloride environment. With respect to conventionally milled specimens, laser machined specimens displayed more than 12 times longer crack initiation time in accelerated stress corrosion cracking test in boiling magnesium chloride as per ASTM G36. Reduced stress corrosion cracking susceptibility of laser machined surface is attributed to its predominantly ferritic duplex microstructure in which anodic ferrite phase was under compressive stress with respect to cathodic austenite.
ISSN:2196-7229
2196-7237
DOI:10.1007/s40516-016-0030-y