Hydrogen-assisted decohesion and localized plasticity in dual-phase steel

Motomichi Koyama, Cemal Cem Tasan, Eiji Akiyama, Kaneaki Tsuzaki, Dierk Raabe

Research output: Contribution to journalArticle

150 Citations (Scopus)

Abstract

Hydrogen embrittlement affects high-strength ferrite/martensite dual-phase (DP) steels. The associated micromechanisms which lead to failure have not been fully clarified yet. Here we present a quantitative micromechanical analysis of the microstructural damage phenomena in a model DP steel in the presence of hydrogen. A high-resolution scanning electron microscopy-based damage quantification technique has been employed to identify strain regimes where damage nucleation and damage growth take place, both with and without hydrogen precharging. The mechanisms corresponding to these regimes have been investigated by employing post-mortem electron channeling contrast imaging and electron backscatter diffraction analyses, as well as additional in situ deformation experiments. The results reveal that damage nucleation mechanism (i.e. martensite decohesion) and the damage growth mechanisms (e.g. interface decohesion) are both promoted by hydrogen, while the crack-arresting capability of the ferrite is significantly reduced. The observations are discussed on the basis of the hydrogen-enhanced decohesion and hydrogen-enhanced localized plasticity mechanisms. We discuss corresponding microstructure design strategies for better hydrogen-related damage tolerance of DP steels.

Original languageEnglish
Pages (from-to)174-187
Number of pages14
JournalActa Materialia
Volume70
DOIs
Publication statusPublished - May 15 2014

Fingerprint

Steel
Plasticity
Hydrogen
Martensite
Ferrite
Nucleation
Damage tolerance
Hydrogen embrittlement
High resolution electron microscopy
Electron diffraction
Cracks
Imaging techniques
Microstructure
Scanning electron microscopy
Electrons
Experiments

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Cite this

Hydrogen-assisted decohesion and localized plasticity in dual-phase steel. / Koyama, Motomichi; Tasan, Cemal Cem; Akiyama, Eiji; Tsuzaki, Kaneaki; Raabe, Dierk.

In: Acta Materialia, Vol. 70, 15.05.2014, p. 174-187.

Research output: Contribution to journalArticle

Koyama, Motomichi ; Tasan, Cemal Cem ; Akiyama, Eiji ; Tsuzaki, Kaneaki ; Raabe, Dierk. / Hydrogen-assisted decohesion and localized plasticity in dual-phase steel. In: Acta Materialia. 2014 ; Vol. 70. pp. 174-187.
@article{82edea5489664ac1bac90ec6a7729142,
title = "Hydrogen-assisted decohesion and localized plasticity in dual-phase steel",
abstract = "Hydrogen embrittlement affects high-strength ferrite/martensite dual-phase (DP) steels. The associated micromechanisms which lead to failure have not been fully clarified yet. Here we present a quantitative micromechanical analysis of the microstructural damage phenomena in a model DP steel in the presence of hydrogen. A high-resolution scanning electron microscopy-based damage quantification technique has been employed to identify strain regimes where damage nucleation and damage growth take place, both with and without hydrogen precharging. The mechanisms corresponding to these regimes have been investigated by employing post-mortem electron channeling contrast imaging and electron backscatter diffraction analyses, as well as additional in situ deformation experiments. The results reveal that damage nucleation mechanism (i.e. martensite decohesion) and the damage growth mechanisms (e.g. interface decohesion) are both promoted by hydrogen, while the crack-arresting capability of the ferrite is significantly reduced. The observations are discussed on the basis of the hydrogen-enhanced decohesion and hydrogen-enhanced localized plasticity mechanisms. We discuss corresponding microstructure design strategies for better hydrogen-related damage tolerance of DP steels.",
author = "Motomichi Koyama and Tasan, {Cemal Cem} and Eiji Akiyama and Kaneaki Tsuzaki and Dierk Raabe",
year = "2014",
month = "5",
day = "15",
doi = "10.1016/j.actamat.2014.01.048",
language = "English",
volume = "70",
pages = "174--187",
journal = "Acta Materialia",
issn = "1359-6454",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Hydrogen-assisted decohesion and localized plasticity in dual-phase steel

AU - Koyama, Motomichi

AU - Tasan, Cemal Cem

AU - Akiyama, Eiji

AU - Tsuzaki, Kaneaki

AU - Raabe, Dierk

PY - 2014/5/15

Y1 - 2014/5/15

N2 - Hydrogen embrittlement affects high-strength ferrite/martensite dual-phase (DP) steels. The associated micromechanisms which lead to failure have not been fully clarified yet. Here we present a quantitative micromechanical analysis of the microstructural damage phenomena in a model DP steel in the presence of hydrogen. A high-resolution scanning electron microscopy-based damage quantification technique has been employed to identify strain regimes where damage nucleation and damage growth take place, both with and without hydrogen precharging. The mechanisms corresponding to these regimes have been investigated by employing post-mortem electron channeling contrast imaging and electron backscatter diffraction analyses, as well as additional in situ deformation experiments. The results reveal that damage nucleation mechanism (i.e. martensite decohesion) and the damage growth mechanisms (e.g. interface decohesion) are both promoted by hydrogen, while the crack-arresting capability of the ferrite is significantly reduced. The observations are discussed on the basis of the hydrogen-enhanced decohesion and hydrogen-enhanced localized plasticity mechanisms. We discuss corresponding microstructure design strategies for better hydrogen-related damage tolerance of DP steels.

AB - Hydrogen embrittlement affects high-strength ferrite/martensite dual-phase (DP) steels. The associated micromechanisms which lead to failure have not been fully clarified yet. Here we present a quantitative micromechanical analysis of the microstructural damage phenomena in a model DP steel in the presence of hydrogen. A high-resolution scanning electron microscopy-based damage quantification technique has been employed to identify strain regimes where damage nucleation and damage growth take place, both with and without hydrogen precharging. The mechanisms corresponding to these regimes have been investigated by employing post-mortem electron channeling contrast imaging and electron backscatter diffraction analyses, as well as additional in situ deformation experiments. The results reveal that damage nucleation mechanism (i.e. martensite decohesion) and the damage growth mechanisms (e.g. interface decohesion) are both promoted by hydrogen, while the crack-arresting capability of the ferrite is significantly reduced. The observations are discussed on the basis of the hydrogen-enhanced decohesion and hydrogen-enhanced localized plasticity mechanisms. We discuss corresponding microstructure design strategies for better hydrogen-related damage tolerance of DP steels.

UR - http://www.scopus.com/inward/record.url?scp=84896415682&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84896415682&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2014.01.048

DO - 10.1016/j.actamat.2014.01.048

M3 - Article

AN - SCOPUS:84896415682

VL - 70

SP - 174

EP - 187

JO - Acta Materialia

JF - Acta Materialia

SN - 1359-6454

ER -