Abstract
An attempt has been made to discuss the mechanisms of hydrogen embrittlement of high strength materials for the economical production, transportation and storage of hydrogen in the hydrogen desired systems. The present work supports this and concludes that the fracture behaviour of copper brazed composite laminates made from 4340 steel does not remain the same at different strain rates in the environments of hydrogen especially at 700 torr under plane strain conditions. This is supported by the load displacement graph, by using an Instron testing machine, and the fractography which supports the same modes of failure during the fracture process. This confirms that the higher degree of hydrogen embrittlement at slower rates and the material's compatibility with hydrogen in high pressure and transmission systems is an important aspect for investigation.
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