Oxidation and Stress Corrosion Cracking Initiation of Austenitic Alloys in Supercritical Water
36th Annual CNS-CNA Student Conference - 2012 June 12


Presented at:
36th Annual CNS-CNA Student Conference
2012 June 12
Location:
Saskatoon, Canada
Session Title:
CNS/CNA Student Conference 2012

Authors:
Yashar Behnamian (University of Alberta )
Ming Li (University of Alberta )
Jing-Li Luo (University of Alberta )
Weixing Chen (University of Alberta )
Wenyue Zheng (CANMET Materials Technology Laboratory )
David Guzonas (Atomic Energy of Canada Limited )
  

Abstract

This study determined the stress corrosion cracking behavior of austenitic alloys in pure supercritical water. Austenitic stainless steels 310S, 316L, and Inconel 625 were tested as static capsule samples at 500o C for up to 5000 h. After that period, crack initiation was readily observable in all samples, signifying susceptibility to stress corrosion cracking. The microcracks in 316L stainless steel and Inconel 625 were almost intergranular, whereas transgranular microcrack initiation was observed in 310S stainless steel.

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