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Behaviour of hydrogen in FeNiC alloys by C. Dagbert; M. Sehili; M. Jerome; J. Galland; L. Hyspecka is a Engineering article available to read on EtoBox.

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## A particular cathodic charging technique was used to evaluate the behaviour of hydrogen on Fe-25.66Ni4.31C alloy. This technique is based on the electrolysis of water injected in a molten salts bath. The electrolytic charging conditions were chosen as -2.05 V/Ag and 300°C. The quantities of hydrogen extracted from specimens of different diameters after electrolysis over different durations were used to calculate both the substantial surface concentration (C, = 3 cm3 H,/cm3 metal) and the hydrogen concentration profiles in austenite. After quenching at -65"C, a linear relationship between the hydrogen concentration and the amount of retained austenite was determined. A critical concentration C, = 0.06 cm3 Hz/cm3 metal, initiated microcracks in martensite. The behaviour of hydrogen on austenite is discussed in terms of grain boundary and dislocation trapping.

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Author

C. Dagbert; M. Sehili; M. Jerome; J. Galland; L. Hyspecka

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1359-6454)

Published

1996

Language

EN

Field

Engineering (Physical Sciences)