オーステナイト系ステンレス鋼における水素化物のX線的研究

概要

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Electrolytical charging of hydrogen into austenitic stainless steels induces a phase transformation from austenite to martensite and hydride formation. The behaviours of these phases have been studied by X-ray diffraction analysis. Hydrides formation was found to be dependent on the nickel content and charged hydrogen concentration in steel. Diffraction analysis of the specimen cathodic-charged at 60℃ revealed the formation of hydride phases [ε'(c.p.h.) and Y_1, Y_2 (F.C.C.)]. The hydride phases were stable at -78℃, but as temperature is raised gradually from -78℃ to room temperature, they become unstable and the martensitic phases were formed. The order of the phase transformation by cathodic charge of hydrogen was[r⇾ hydrides (ε'+ y) ⇾α'_H⇾α'_H+ ε_H] in the charging process, [r⇾ hydrides (ε'+ y) ⇾ε_H⇾ε_H+α'_H] in the aging process.
社団法人日本材料学会の論文
1977-04-15