Abstract
Hydrogen embrittlement characteristics, especially pertinent to sulfide stress cracking, of steels has been investigated to a great extent. Investigations of hydrogen embrittlement and sulfide stress cracking of nickel and nickel-base alloys have not been quite as extensive as in the case of steels. However, there are many areas of similarities between the behaviors of the two alloy systems which are discussed in this paper. These include the effect of applied stress, strength, temperature, strain rate, and impurity segregation. Areas of dissimilarities are also pointed out. In the area of stress corrosion cracking, especially involving chloride solutions, there are many parallels between the behaviors of austenitic stainless steels and nickel-base alloys. These include the effects of oxygen and chloride, temperature, H2S, and composition. An appreciation of these similarities can lead to a better understanding of the environmental cracking behavior of nickel and nickel-base alloys and point out the aspects needing further investigation.
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