EFFECT OF PRE-STRAIN ON HYDROGEN EMBRITTLEMENT IN INTERCRITICALLY ANNEALED Fe-6.5Mn-0.08C MEDIUM-MN STEELS

Sang Gyu Kim; Young Chul Yoon; Seok Woo Ko; Byoungchul Hwang

doi:10.24425/amm.2022.141080

EFFECT OF PRE-STRAIN ON HYDROGEN EMBRITTLEMENT IN INTERCRITICALLY ANNEALED Fe-6.5Mn-0.08C MEDIUM-MN STEELS

Sang Gyu Kim, Young Chul Yoon, Seok Woo Ko, Byoungchul Hwang

Dept. of Materials Science & Engineering

Seoul National University of Science and Technology (SNUST)

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

Abstract

The present research deals with the effect of pre-strain on the hydrogen embrittlement behavior of intercritically annealed medium-Mn steels. A slow strain-rate tensile test was conducted after hydrogen charging by an electrochemical permeation method. Based on EBSD and XRD analysis results, the microstructure was composed of martensite and retained austenite of which fraction increased with an increase in the intercritical annealing temperature. The tensile test results showed that the steel with a higher fraction of retained austenite had relatively high hydrogen embrittlement resistance because the retained austenite acts as an irreversible hydrogen trap site. As the amount of pre-strain was increased, the hydrogen embrittlement resistance decreased notably due to an increase in the dislocation density and strain-induced martensite transformation.

Original language	English
Pages (from-to)	1491-1495
Number of pages	5
Journal	Archives of Metallurgy and Materials
Volume	67
Issue number	4
DOIs	https://doi.org/10.24425/amm.2022.141080
State	Published - 2022

Keywords

Electrochemical charging
Hydrogen embrittlement
Medium-manganese steel
Pre-strain
Slow strain-rate tensile (SSRT) test

Access to Document

10.24425/amm.2022.141080

Cite this

@article{ad24a21525a94baca711e03f18c14152,

title = "EFFECT OF PRE-STRAIN ON HYDROGEN EMBRITTLEMENT IN INTERCRITICALLY ANNEALED Fe-6.5Mn-0.08C MEDIUM-MN STEELS",

abstract = "The present research deals with the effect of pre-strain on the hydrogen embrittlement behavior of intercritically annealed medium-Mn steels. A slow strain-rate tensile test was conducted after hydrogen charging by an electrochemical permeation method. Based on EBSD and XRD analysis results, the microstructure was composed of martensite and retained austenite of which fraction increased with an increase in the intercritical annealing temperature. The tensile test results showed that the steel with a higher fraction of retained austenite had relatively high hydrogen embrittlement resistance because the retained austenite acts as an irreversible hydrogen trap site. As the amount of pre-strain was increased, the hydrogen embrittlement resistance decreased notably due to an increase in the dislocation density and strain-induced martensite transformation.",

keywords = "Electrochemical charging, Hydrogen embrittlement, Medium-manganese steel, Pre-strain, Slow strain-rate tensile (SSRT) test",

author = "Kim, \{Sang Gyu\} and Yoon, \{Young Chul\} and Ko, \{Seok Woo\} and Byoungchul Hwang",

note = "Publisher Copyright: {\textcopyright} 2022. The Author(s).",

year = "2022",

doi = "10.24425/amm.2022.141080",

language = "English",

volume = "67",

pages = "1491--1495",

journal = "Archives of Metallurgy and Materials",

issn = "1733-3490",

number = "4",

}

TY - JOUR

T1 - EFFECT OF PRE-STRAIN ON HYDROGEN EMBRITTLEMENT IN INTERCRITICALLY ANNEALED Fe-6.5Mn-0.08C MEDIUM-MN STEELS

AU - Kim, Sang Gyu

AU - Yoon, Young Chul

AU - Ko, Seok Woo

AU - Hwang, Byoungchul

PY - 2022

Y1 - 2022

N2 - The present research deals with the effect of pre-strain on the hydrogen embrittlement behavior of intercritically annealed medium-Mn steels. A slow strain-rate tensile test was conducted after hydrogen charging by an electrochemical permeation method. Based on EBSD and XRD analysis results, the microstructure was composed of martensite and retained austenite of which fraction increased with an increase in the intercritical annealing temperature. The tensile test results showed that the steel with a higher fraction of retained austenite had relatively high hydrogen embrittlement resistance because the retained austenite acts as an irreversible hydrogen trap site. As the amount of pre-strain was increased, the hydrogen embrittlement resistance decreased notably due to an increase in the dislocation density and strain-induced martensite transformation.

AB - The present research deals with the effect of pre-strain on the hydrogen embrittlement behavior of intercritically annealed medium-Mn steels. A slow strain-rate tensile test was conducted after hydrogen charging by an electrochemical permeation method. Based on EBSD and XRD analysis results, the microstructure was composed of martensite and retained austenite of which fraction increased with an increase in the intercritical annealing temperature. The tensile test results showed that the steel with a higher fraction of retained austenite had relatively high hydrogen embrittlement resistance because the retained austenite acts as an irreversible hydrogen trap site. As the amount of pre-strain was increased, the hydrogen embrittlement resistance decreased notably due to an increase in the dislocation density and strain-induced martensite transformation.

KW - Electrochemical charging

KW - Hydrogen embrittlement

KW - Medium-manganese steel

KW - Pre-strain

KW - Slow strain-rate tensile (SSRT) test

UR - https://www.scopus.com/pages/publications/85139668959

U2 - 10.24425/amm.2022.141080

DO - 10.24425/amm.2022.141080

M3 - Article

AN - SCOPUS:85139668959

SN - 1733-3490

VL - 67

SP - 1491

EP - 1495

JO - Archives of Metallurgy and Materials

JF - Archives of Metallurgy and Materials

IS - 4

ER -

EFFECT OF PRE-STRAIN ON HYDROGEN EMBRITTLEMENT IN INTERCRITICALLY ANNEALED Fe-6.5Mn-0.08C MEDIUM-MN STEELS

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this