Hydrogen absorption and embrittlement of martensitic medium-Mn steels

Ahjeong Lyu; Junghoon Lee; Jae Hoon Nam; Minjeong Kim; Young Kook Lee

doi:10.1016/j.corsci.2023.111304

Hydrogen absorption and embrittlement of martensitic medium-Mn steels

Ahjeong Lyu, Junghoon Lee, Jae Hoon Nam, Minjeong Kim, Young Kook Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

In the present study, the H absorption and the H embrittlement (HE) resistance of medium (3–7 wt%) Mn martensitic steels were investigated. When the specimens were electrochemically H-charged, 7 wt% Mn specimen had the highest diffusible H content because of the highest reversible H trap density. When the diffusible H content was identical, HE resistance deterioration arose due to the Mn addition, probably caused by grain boundary decohesion and H segregation into the grain boundaries. However, this condition was improved by B addition due to the enhanced grain boundary cohesion and the suppression of H segregation into the grain boundaries.

Original language	English
Article number	111304
Journal	Corrosion Science
Volume	221
DOIs	https://doi.org/10.1016/j.corsci.2023.111304
Publication status	Published - 2023 Aug 15

Bibliographical note

Publisher Copyright:
© 2023 Elsevier Ltd

All Science Journal Classification (ASJC) codes

General Chemistry
General Chemical Engineering
General Materials Science

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10.1016/j.corsci.2023.111304

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title = "Hydrogen absorption and embrittlement of martensitic medium-Mn steels",

abstract = "In the present study, the H absorption and the H embrittlement (HE) resistance of medium (3–7 wt%) Mn martensitic steels were investigated. When the specimens were electrochemically H-charged, 7 wt% Mn specimen had the highest diffusible H content because of the highest reversible H trap density. When the diffusible H content was identical, HE resistance deterioration arose due to the Mn addition, probably caused by grain boundary decohesion and H segregation into the grain boundaries. However, this condition was improved by B addition due to the enhanced grain boundary cohesion and the suppression of H segregation into the grain boundaries.",

keywords = "Fracture mechanisms, Grain boundary segregation, Hydrogen embrittlement, Martensite, Medium-Mn steel",

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doi = "10.1016/j.corsci.2023.111304",

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T1 - Hydrogen absorption and embrittlement of martensitic medium-Mn steels

AU - Lyu, Ahjeong

AU - Lee, Junghoon

AU - Nam, Jae Hoon

AU - Kim, Minjeong

AU - Lee, Young Kook

PY - 2023/8/15

Y1 - 2023/8/15

N2 - In the present study, the H absorption and the H embrittlement (HE) resistance of medium (3–7 wt%) Mn martensitic steels were investigated. When the specimens were electrochemically H-charged, 7 wt% Mn specimen had the highest diffusible H content because of the highest reversible H trap density. When the diffusible H content was identical, HE resistance deterioration arose due to the Mn addition, probably caused by grain boundary decohesion and H segregation into the grain boundaries. However, this condition was improved by B addition due to the enhanced grain boundary cohesion and the suppression of H segregation into the grain boundaries.

AB - In the present study, the H absorption and the H embrittlement (HE) resistance of medium (3–7 wt%) Mn martensitic steels were investigated. When the specimens were electrochemically H-charged, 7 wt% Mn specimen had the highest diffusible H content because of the highest reversible H trap density. When the diffusible H content was identical, HE resistance deterioration arose due to the Mn addition, probably caused by grain boundary decohesion and H segregation into the grain boundaries. However, this condition was improved by B addition due to the enhanced grain boundary cohesion and the suppression of H segregation into the grain boundaries.

KW - Fracture mechanisms

KW - Grain boundary segregation

KW - Hydrogen embrittlement

KW - Martensite

KW - Medium-Mn steel

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DO - 10.1016/j.corsci.2023.111304

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JO - Corrosion Science

JF - Corrosion Science

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Hydrogen absorption and embrittlement of martensitic medium-Mn steels

Abstract

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