Tensile and fracture behaviors of austenitic high-manganese steels subject to different hydrogen embrittlement test methods

Authors
Lee, Sang-InLee, Ji-MinLee, Seung-YongKim, Han-JinSuh, Jin-YooShim, Jae-HyeokBaek, Un-BongNahm, Seung-HoonLee, JoonhoHwang, Byoungchul
Issue Date
2019-10-24
Publisher
ELSEVIER SCIENCE SA
Citation
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.766
Abstract
The hydrogen-embrittlement susceptibility of austenitic high-manganese steels according to different hydrogen-charging test methods was discussed in terms of hydrogen-embrittlement process and fracture mechanism. Exsitu electrochemical and high-pressure thermal hydrogen-charging methods exhibited a difference in hydrogen-embrittlement susceptibility because they affect the permeability and diffusivity of hydrogen. Moreover, the insitu high-pressure gaseous hydrogen-charging method showed the most apparent hydrogen-embrittlement susceptibility because higher triaxial stress in the necked region caused by plastic instability accelerates hydrogen charging in the specimen during tensile testing in hydrogen environment, thus leading to intergranular fracture in all regions.
Keywords
STACKING-FAULT ENERGY; STAINLESS-STEELS; ENVIRONMENT EMBRITTLEMENT; STRAIN LOCALIZATION; PLASTICITY; MICROSTRUCTURE; SUSCEPTIBILITY; DEFORMATION; MECHANISM; RESISTANCE; STACKING-FAULT ENERGY; STAINLESS-STEELS; ENVIRONMENT EMBRITTLEMENT; STRAIN LOCALIZATION; PLASTICITY; MICROSTRUCTURE; SUSCEPTIBILITY; DEFORMATION; MECHANISM; RESISTANCE; Hydrogen embrittlement; Austenitic; High-manganese steel; Hydrogen charging; Fracture
ISSN
0921-5093
URI
https://pubs.kist.re.kr/handle/201004/119431
DOI
10.1016/j.msea.2019.138367
Appears in Collections:
KIST Article > 2019
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