|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Oil and Gas and AMREE Oil & Gas III
||Development of Cr-based Duplex Alloy for Corrosive Environments I: Evaluation of Mechanical Properties and Pitting Potential
||Masafumi Nojima, Tomonori Kimura, Makoto Ogata, Naoya Toko, Kosuke Kuwabara
|On-Site Speaker (Planned)
Cr based duplex alloys (CrDA) as materials for instruments operating in Oil&Gas harsh environments have been developed. CrDA is characterized by the duplex structure composed of hard and corrosion-resistant α phase and ductile γ phase. We performed mechanical and electrochemical tests to optimize the microstructure of CrDA and to exhibit the superiority as the corrosion-resistant structural material. Nine alloys with different phase fractions and Cr contents were formed with vacuum melting and casting. CrDA with γ phase areal fraction less than 47 % exhibited 0.2 % proof stress over 733 MPa and fracture elongation over 10.9% regardless of Cr content in the γ phase. No alloys experienced pitting corrosion under the potential less than 1000 mV v.s. SHE standard electrode in artificial sea water at 30℃.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)