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  4. Fatigue life enhancement of TIG-welded 304L stainless steels by shot peening
 
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Fatigue life enhancement of TIG-welded 304L stainless steels by shot peening

Publikationstyp
Journal Article
Date Issued
2019-02-25
Sprache
English
Author(s)
Benchouia, S.  
Merakeb, Noureddine  
Adjel, S.  
Ehlers, Sören  
Baccouche, M.  
Kaddour, A.  
Institut
Konstruktion und Festigkeit von Schiffen M-10  
TORE-URI
http://hdl.handle.net/11420/2158
Journal
International Journal of Advanced Manufacturing Technology  
Volume
100
Issue
9-12
Start Page
2885
End Page
2893
Citation
International Journal of Advanced Manufacturing Technology 9-12 (100): 2885-2893 (2019-02-25)
Publisher DOI
10.1007/s00170-018-2898-5
Scopus ID
2-s2.0-85061315430
Shot peening is a cold working process that leads to changes of residual stress in the surface layer and the microstructure. In this paper, we studied the effect of the stress ratio and shot peening on the fatigue life of AISI 304L austenitic stainless steel welded using a fully manual gas tungsten arc welding process (GTAW). The specimens are prepared by welding flat plates with thickness of 1 mm using GTAW process and the 308 stainless steel as the filler metal. Results indicate that the fatigue life of the as-welded material under tension–compression loading (stress ratio R = − 1) is longer compared to fatigue life under tension–tension loading (stress ratio R = 0). Furthermore, the microhardness and fatigue life are found to be improved after shot peening post-welding treatment for durations ranging from 5 to 7 min. The improvement in tensile stress and microhardness of treated material is as good as the results reported using the more advanced and costly techniques. Also, the findings suggest that influence of duration of shot peening is more significant on the fatigue life than on the microhardness. © 2018, Springer-Verlag London Ltd., part of Springer Nature.
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