|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Nuclear Energy
||Effect of Steam Pressure on the Oxidation Behaviour of Alloy 625
||Shengli Jiang, Xiao Huang, Wenjing Li, Pei Liu
|On-Site Speaker (Planned)
The preliminary design of the Canadian SCWR uses a coolant operating under a pressure of 25 MPa at 625oC, reaching a peak temperature od 800oC. This presents challenges in materials selections due to limited data on material performance at such high temperatures and pressure. Ni based alloys have been of particular interest due to their ability to maintain high strength and toughness at elevated temperatures. Nickel-based Alloy 625 was assessed at 625oC for 1000 hours in supercritical water, subcritical water, and superheated steam. The samples showed small amount of weight gains after the exposure at 29 MPa and 0.1 MPa, and a slight weight loss at 8 MPa due to pitting formation. SEM examination of the compositions of the surface oxide indicated similar oxide formation on the top surface after exposures at different pressures, likely NiO or/and Ni(Cr,Al)2O4 type spinel. The implications of these results are discussed.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)