EDP Sciences Journals List
Issue J. Phys. IV France
Volume 10, Number PR6, April 2000
The Sixth Japan-France Materials Science Seminar
JFMSS-6
Microstructural Design for Improved Mechanical Behaviour of Advanced Materials
Page(s) Pr6-185 - Pr6-190
DOI http://dx.doi.org/10.1051/jp4:2000632

The Sixth Japan-France Materials Science Seminar
JFMSS-6
Microstructural Design for Improved Mechanical Behaviour of Advanced Materials

J. Phys. IV France 10 (2000) Pr6-185-Pr6-190

DOI: 10.1051/jp4:2000632

Statistical approach for evaluating SCC initiation and propagation behavior of sensitized Type 304 stainless steel

T. Shibata, S. Zhang and T. Haruna

Department of Materials Science and Processing, Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan


Abstract
The crack initiation and propagation behavior of a sensitized Type 304 stainless steel in distilled water containing small amounts of Na2SO4 or Na2B4O7 impurities was investigated by using slow strain rate technique (SSRT) with an in-situ cracking observation system, and analyzed with a statistical approach. It was found that the crack initiation time for the steel in Na2SO4 or Na2B4O7 solutions obeyed the exponential distribution, while KISCC and crack velocity obeyed the Weibull distribution. An increase in Na2B4O7 concentration decreased the SCC susceptibility of the steel by delaying crack initiation time, reducing the crack initiation rate and increasing KISCC. In contrast, an increase in NA2SO4 concentration increased SCC susceptibility of the steel by shortening crack initiation time and accelerating crack propagation



© EDP Sciences 2000