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7.10】Prof. Tetsuo Shoji
Topic: Role of hydrogen in...
 
2012-07-06 | 文章来源:材料环境腐蚀研究中心        【 】【打印】【关闭

Topic: Role of hydrogen in Enhanced Oxidation in Alloy 600 and 316L stainless steel in high temperature waters

Speaker: Prof. Tetsuo Shoji

      Frontier Research Initiative

      New Industry Creation Hatchery Center (NICHe)

     Tohoku University, Japan

Time: 9:00-10:30 AM., Tues., July 10, 2012

Venue: Lecture Hall, South Campus, IMR CAS

Welcome to attend!

Abstract

Metal/Oxide interface profile is one of our great concern from a point of view of stress corrosion cracking (SCC) initiation.  A new approach for characterization of interface profile and its time dependence was proposed.  In the analysis, oxidation localization parameters were proposed and especially oxidation localization depth parameter can describe a degree of oxidation localization. 

Based upon this analysis on time dependence of Metal/Oxide Interface profile suggested that Oxidation localization can be a precursor of SCC initiation.  Several important influencing factors were examined, among which role of hydrogen, neutron irradiation and localized slip and grain boundary are potentially of importance in oxidation localization.  Atomic scale quantum chemical molecular dynamics showed a possible mechanism of hydrogen enhanced oxidation and XPS and GD-OES can experimentally support this hydrogen effects.

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