|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Oil and Gas and AMREE Oil & Gas III
||Effect of Severe Plastic Deformation (SPD) Surface Treatment on Corrosion Resistance and Environmental Cracking (EC) Susceptibility of Various Alloys
||Ting Chen, Manasa Varanasi, Kripa Varanasi
|On-Site Speaker (Planned)
The effects of severe plastically deformed (SPD) surface treatment techniques on corrosion and environmental cracking (EC) resistance of super-alloy 718 and stainless-steel 17-4PH were investigated. High frequency hammer peening and surface mechanical attrition (SMA) techniques were applied to plastically deform sample surfaces of alloys 718 and 17-4 PH. Electrochemical tests performed on untreated and SPD processed alloy 718 in corrosive drilling fluids indicate that SPD abets its performance in hostile environments. To assess its EC susceptibility, SPD processed 17-4PH C rings stressed to 90% of its yield-strength were exposed to HPHT sour environment having significantly more hydrogen sulphide (H2S) than MR0175 recommended limit for the alloy. In contrast to untreated alloy, SMAT treated samples did not suffer EC due to compressive residual stresses introduced by SPD offsetting tensile component. In light of these results effect of SPD and their subsequent corrosion / EC performance on several light alloys are discussed.
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