Seoul National University of Science and Technology - Department of Materials Science and Engineering
Date Written: June 19, 2019
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. Ex-situ 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 in-situ 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 at all regions of the specimens.
Lee, Sang-In and Lee, Ji-Min and Lee, Seung-Yong and Kim, Han-Jin and Suh, Jin-Yoo and Shim, Jae-Hyeok and Baek, Un-Bong and Nahm, Seung-Hoon and Lee, Joonho and Hwang, Byoungchul, Tensile and Fracture Behaviors of Austenitic High-Manganese Steels Subject to Different Hydrogen Embrittlement Test Methods (June 19, 2019). Available at SSRN: https://ssrn.com/abstract=3406393 or http://dx.doi.org/10.2139/ssrn.3406393
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