Details
| Original language | English |
|---|---|
| Pages (from-to) | 2492-2502 |
| Number of pages | 11 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 43 |
| Issue number | 4 |
| Publication status | Published - 28 Dec 2017 |
Abstract
The effect of the bimodal grain size distribution on the hydrogen susceptibility of a high-Mn fully austenitic twinning-induced plasticity (TWIP) steel was investigated by tensile testing under ongoing electrochemical hydrogen charging. Observation of the surface microstructure of the hydrogen-charged specimen yielded a correlation between the microstructure, crack initiation sites, and crack propagation path. The observed embrittlement arose from crack initiation/propagation along the grain and twin boundaries and delamination governed crack growth. In the present bimodal TWIP steel, the fine grained regions mostly showed intergranular cracking along the grain boundaries between the fine and coarse grains. By contrast, the coarse grained region exhibited transgranular cracking along the twin boundaries. The delamination cracking phenomena is rationalized by the evident nucleation, growth, and coalescence of microvoids in the tensile direction. The results reveal that the bimodal grain size distribution of TWIP steel plays a major role in hydrogen-assisted cracking and the evolution of delamination-related damage.
Keywords
- Bimodal grain size distribution, Crack growth, Delamination, Hydrogen Embrittlement, Twinning-induced plasticity steel
ASJC Scopus subject areas
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Energy(all)
- Fuel Technology
- Physics and Astronomy(all)
- Condensed Matter Physics
- Energy(all)
- Energy Engineering and Power Technology
Sustainable Development Goals
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In: International Journal of Hydrogen Energy, Vol. 43, No. 4, 28.12.2017, p. 2492-2502.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Hydrogen-assisted failure in a bimodal twinning-induced plasticity steel
T2 - Delamination events and damage evolution
AU - Mohammadi, Abbas
AU - Koyama, Motomichi
AU - Gerstein, Gregory
AU - Maier, Hans Jürgen
AU - Noguchi, Hiroshi
N1 - Funding information: This study was financially supported by JSPS KAKENHI (Grant Number JP17H04956 ).
PY - 2017/12/28
Y1 - 2017/12/28
N2 - The effect of the bimodal grain size distribution on the hydrogen susceptibility of a high-Mn fully austenitic twinning-induced plasticity (TWIP) steel was investigated by tensile testing under ongoing electrochemical hydrogen charging. Observation of the surface microstructure of the hydrogen-charged specimen yielded a correlation between the microstructure, crack initiation sites, and crack propagation path. The observed embrittlement arose from crack initiation/propagation along the grain and twin boundaries and delamination governed crack growth. In the present bimodal TWIP steel, the fine grained regions mostly showed intergranular cracking along the grain boundaries between the fine and coarse grains. By contrast, the coarse grained region exhibited transgranular cracking along the twin boundaries. The delamination cracking phenomena is rationalized by the evident nucleation, growth, and coalescence of microvoids in the tensile direction. The results reveal that the bimodal grain size distribution of TWIP steel plays a major role in hydrogen-assisted cracking and the evolution of delamination-related damage.
AB - The effect of the bimodal grain size distribution on the hydrogen susceptibility of a high-Mn fully austenitic twinning-induced plasticity (TWIP) steel was investigated by tensile testing under ongoing electrochemical hydrogen charging. Observation of the surface microstructure of the hydrogen-charged specimen yielded a correlation between the microstructure, crack initiation sites, and crack propagation path. The observed embrittlement arose from crack initiation/propagation along the grain and twin boundaries and delamination governed crack growth. In the present bimodal TWIP steel, the fine grained regions mostly showed intergranular cracking along the grain boundaries between the fine and coarse grains. By contrast, the coarse grained region exhibited transgranular cracking along the twin boundaries. The delamination cracking phenomena is rationalized by the evident nucleation, growth, and coalescence of microvoids in the tensile direction. The results reveal that the bimodal grain size distribution of TWIP steel plays a major role in hydrogen-assisted cracking and the evolution of delamination-related damage.
KW - Bimodal grain size distribution
KW - Crack growth
KW - Delamination
KW - Hydrogen Embrittlement
KW - Twinning-induced plasticity steel
UR - http://www.scopus.com/inward/record.url?scp=85042368448&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2017.11.177
DO - 10.1016/j.ijhydene.2017.11.177
M3 - Article
AN - SCOPUS:85042368448
VL - 43
SP - 2492
EP - 2502
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 4
ER -