EFFECT OF HYDROGEN ON CRACK TIP BLUNTING CHARACTERISTICS OF 304L STAINLESS-STEEL

被引：0
|
作者：
HARDIE, D
BUTLER, JJF
机构：
[1] Univ of Newcastle upon Tyne, Newcastle upon Tyne, Engl, Univ of Newcastle upon Tyne, Newcastle upon Tyne, Engl
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 1988年 / 4卷 / 06期
关键词：
STEEL - Crack Propagation - STEEL TESTING - Fatigue;
D O I：
10.1179/mst.1988.4.6.530
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
J integral measurements have been conducted on various samples of 304L stainless steel having different levels of austenite stability as a result of variations in composition. In certain materials, significant deviations from the theoretical blunting line were shown in the experimental results. These deviations are discussed and a method is proposed for rationalising the results to allow a more meaningful assessment to be made of the effects of hydrogen charging on the various materials. In this way, a significant reduction in the value of J//I//c is clearly revealed in materials in which martensite may be produced by deformation. Hydrogen charging also produces a significant decrease in the slope of the experimental blunting line for these materials that is not consistent with the observed increase in proof stress. It is suggested that this decrease is associated with the localisation of plastic deformation by the presence of hydrogen.
引用
收藏
页码：530 / 534
页数：5
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