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Enhancement of Fatigue Strength of 316L Austenitic Stainless Steel using Sand Blasting

Author : Murtadha A. Jabbar and Zainab A. Ibrahim

Pages : 371-374
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To investigate the effects of sand blasting on high-cycle fatigue properties of Type 316L austenitic stainless steel, rotating bending fatigue tests were conducted on sand blasted specimens by varying sand blasting parameters. The benefit expected from using sand blasting process is to introduce residual compressive stresses that lead to an improvement in material’s properties such as fatigue strength and hardness by a cheap and rather quick treatment. This paper aimed to estimate the effect of varying the sand grain size employed in sand blasting process and treatment duration and blasting distance on fatigue strength of austenitic stainless steel grade 316L, and comparing the results of different cases. Since fatigue strength strongly depends on surface properties, surface roughness and hardness tests were conducted as well. Results revealed a considerable enhancement in fatigue strength for all cases and a good reduction in surface roughness (34-74) %, but a slight increase in hardness (6.5-10) %.

Keywords: Fatigue Strength, Stainless Steel etc

Article published in International Journal of Current Engineering and Technology, Vol.5, No.1 (Feb-2015)


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