MECHANISMS OF HYDROGEN INDUCED DELAYED CRACKING IN HYDRIDE FORMING MATERIALS

被引：223

作者：

DUTTON, R ^{[1
]}

NUTTALL, K ^{[1
]}

PULS, MP ^{[1
]}

SIMPSON, LA ^{[1
]}

机构：

[1] ATOM ENERGY CANADA LTD,MAT SCI BRANCH,PINAWA R0E 1L0,MANITOBA,CANADA

来源：

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1977年 / 8卷 / 10期

关键词：

FRACTURE MECHANICS - ZIRCONIUM METALLOGRAPHY - ZIRCONIUM NIOBIUM ALLOYS - Fracture;

D O I：

10.1007/BF02644858

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanistic understanding of hydrogen induced delayed cracking in hydride forming materials is reviewed. The main conclusion is that ccracking is due to the precipitation of brittle hydrides at crack tips. A simple quantitative model for the crack propagation process is presented and discussed. A comparison between the model and experimental data indicates reasonable agreement at high temperatures for the Zr-2. 5%Nb alloy. The least understood aspect of the mechanism is the details of the developing hydride morphology at the crack tip and the parameters governing unstable crack advance through these hydrides.

引用

页码：1553 / 1562

页数：10

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