Stress corrosion cracking mechanisms of 316 stainless steels in sub-critical liquid water and supercritical water from a "dielectric constant of water" point of view

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

Cracking behavior of sensitized and non-sensitized stainless steels has been investigated in water under various pressures and at fixed temperature above and below the critical point by using SSRT technique, and discussed its correlation with dielectric constant of water. Two different kinds of cracking responses to dielectric constant of water were found as follows; For sensitized 316 SS - pure water system; (1) Effects of phase state of water and applied pressure, more essentially, physical property of water, were clearly observed. (2) SCC did not occur in the oxygenated "gas-like" supercritical water at 400°C/25MPa. (3) Cracking occurred at 400°C/30MPa and the cracking severity was more pronounced as applied pressure was increased up to 60MPa at the same temperature. (4) This variation in cracking susceptibility being dependent on pressure was understood from dielectric constant of water. (5) The results give a strong evidence of the "dissolution mechanism". For non-sensitized 316L SS - sulfuric acid water system; (1) Non-sensitized 316L SS severely cracked with IG even in a "gas-like" supercritical water. (2) Dielectric constant did not affect cracking severity. (3) Cracking was more enhanced at higher temperature. (4) The results would indicate "dissolution mechanism" is not very likely and might suggest "oxidation cracking".

本文言語English
ホスト出版物のタイトルProceedings of the 2004 International Congress on Advances in Nuclear Power Plants, ICAPP'04
出版社American Nuclear Society
ページ1942-1949
ページ数8
ISBN(印刷版)0894486802, 9780894486807
出版ステータスPublished - 2004 1月 1
イベントProceedings of the 2004 International Congress on Advances in Nuclear Power Plants, ICAPP'04 - Pittsburgh, PA, United States
継続期間: 2004 6月 132004 6月 17

出版物シリーズ

名前Proceedings of the 2004 International Congress on Advances in Nuclear Power Plants, ICAPP'04

Other

OtherProceedings of the 2004 International Congress on Advances in Nuclear Power Plants, ICAPP'04
国/地域United States
CityPittsburgh, PA
Period04/6/1304/6/17

ASJC Scopus subject areas

  • 工学(全般)

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