Application of acoustic emission method to study metallic titanium hydrogenation process

The changes occurring in metallic titanium specimens during hydrogenation, that are accompanying by high amplitude acoustic emission signals, have been studied. It was determined that the most probable reason for generation of these signals is crack formation in hydrogenated specimens as a result of...

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Bibliographic Details
Published inInternational journal of hydrogen energy Vol. 42; no. 35; pp. 22628 - 22632
Main Authors Kuznetsov, A.A., Berezhko, P.G., Kunavin, S.M., Zhilkin, E.V., Tsarev, M.V., Yaroshenko, V.V., Mokrushin, V.V., Yunchina, O. Yu, Mityashin, S.A.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 31.08.2017
Subjects
Acoustic emission
Cracking
Hydrogenation
Titanium powder
Titanium sponge
Acoustic emission
Cracking
Hydrogenation
Titanium sponge
Titanium powder
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Summary:The changes occurring in metallic titanium specimens during hydrogenation, that are accompanying by high amplitude acoustic emission signals, have been studied. It was determined that the most probable reason for generation of these signals is crack formation in hydrogenated specimens as a result of internal stresses caused by structural changes in material. Also it was determined that typical sizes of the cracks are comparable with particle sizes of hydrogenated specimens, and the atomic ratio [H]/[Ti] in a solid phase, when crack formation is the most intensive, is generally lower for titanium sponge than for powder made from this sponge, which is explained by a larger specific surface of powder comparatively that of sponge. •The hydrogenation of titanium specimens is followed by acoustic emission signals.•The most intensive signals are generated due to specimens macro level cracking.•The ratio [H]/[Ti] corresponds to cracking depends on the specimen's specific surface.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2017.01.234