Influence of prior austenite grain boundary on the resistance to hydrogen attack of steel.

DOI

Bibliographic Information

Other Title
  • 鋼の耐水素侵食性におよぼす旧オーステナイト粒界の影響

Description

The vessels operated under high temperature and pressure hydrogen are composed of welded structures. It is generally said that the weld has higher susceptibility to hydrogen attack than the base metal.<br>One of factors which influence hydrogen attack in the welds, seems to be presence of prior austenite grain boundaries.<br>In this paper, the effects of microstructural change at the prior austenite grain boundaries were investigated with 9% Ni steel in which no carbide changes occur during tempering.<br>Hydrogen attack was severer in the specimen with higher tensile strength. However, electron microscopic examination indicated that the degree of the hydrogen attack varied with microstructural change in specimens with the same strength level.<br>The favorable microstructure is that with secondary austenite precipitated on the prior austenite grain boundaries during tempering.<br>It may be concluded that the prior austenite grain boundaries have high susceptibility to hydrogen attack and the resistance to it is improved by discontinuities in the prior austenite grain boundaries.

Journal

Details 詳細情報について

  • CRID
    1390282679592642944
  • NII Article ID
    130004092000
  • DOI
    10.11181/hpi1972.27.99
  • ISSN
    13479598
    03870154
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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