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

Sang In Lee, Ji Min Lee, Seung Yong Lee, Han Jin Kim, Jin Yoo Suh, Jae Hyeok Shim, Un Bong Baek, Seung Hoon Nahm, Joonho Lee, Byoungchul Hwang

Research output: Contribution to journalArticle

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 in all regions.

Original languageEnglish
Article number138367
JournalMaterials Science and Engineering A
Volume766
DOIs
Publication statusPublished - 2019 Oct 24

Fingerprint

hydrogen embrittlement
Hydrogen embrittlement
Steel
Manganese
manganese
Hydrogen
steels
charging
hydrogen
magnetic permeability
triaxial stresses
Tensile testing
diffusivity
permeability
plastics
Plastics

Keywords

  • Austenitic
  • Fracture
  • High-manganese steel
  • Hydrogen charging
  • Hydrogen embrittlement

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Tensile and fracture behaviors of austenitic high-manganese steels subject to different hydrogen embrittlement test methods. / Lee, Sang In; Lee, Ji Min; Lee, Seung Yong; Kim, Han Jin; Suh, Jin Yoo; Shim, Jae Hyeok; Baek, Un Bong; Nahm, Seung Hoon; Lee, Joonho; Hwang, Byoungchul.

In: Materials Science and Engineering A, Vol. 766, 138367, 24.10.2019.

Research output: Contribution to journalArticle

Lee, Sang In ; Lee, Ji Min ; Lee, Seung Yong ; Kim, Han Jin ; Suh, Jin Yoo ; Shim, Jae Hyeok ; Baek, Un Bong ; Nahm, Seung Hoon ; Lee, Joonho ; Hwang, Byoungchul. / Tensile and fracture behaviors of austenitic high-manganese steels subject to different hydrogen embrittlement test methods. In: Materials Science and Engineering A. 2019 ; Vol. 766.
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AU - Lee, Sang In

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AU - Lee, Seung Yong

AU - Kim, Han Jin

AU - Suh, Jin Yoo

AU - Shim, Jae Hyeok

AU - Baek, Un Bong

AU - Nahm, Seung Hoon

AU - Lee, Joonho

AU - Hwang, Byoungchul

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AB - 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 in all regions.

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