Details
| Original language | English |
|---|---|
| Pages (from-to) | 1278-1286 |
| Number of pages | 9 |
| Journal | ISIJ international |
| Volume | 61 |
| Issue number | 4 |
| Early online date | 25 May 2020 |
| Publication status | Published - 15 Apr 2021 |
Abstract
Hydrogen-assisted crack growth of pre-strained twinning-induced plasticity (TWIP) steel was investigated using artificial defects (micro-drilled holes), which acted as artificial crack initiation sites. Hydrogen was introduced into the specimens by electrochemical hydrogen charging during slow strain rate tensile test. The quasi-cleavage crack propagation observed was due to repeated crack initiation near the crack tip and subsequent coalescence. Crack initiation near the crack tip occurred after plastic deformation of the crack tip, and pre-straining facilitated plasticity-driven crack initiation. The early stage of plasticity-driven crack growth was sensitive to the crack length and remote stress level. Accordingly, the crack growth rate in the early stage increased with the increase in the initial defect size. In the following stage of the crack growth, the crack growth rate exhibited a complicated trend with respect to the crack length, which is possibly due to the plastic-wake-altered stress field around the crack tip, which depends on the initial defect size.
Keywords
- Crack propagation, Hydrogen embrittlement, Pre-strain, Quasi-cleavage, Twinning-induced plasticity steel
ASJC Scopus subject areas
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Materials Science(all)
- Metals and Alloys
- Materials Science(all)
- Materials Chemistry
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In: ISIJ international, Vol. 61, No. 4, 15.04.2021, p. 1278-1286.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Hydrogen-assisted crack propagation in pre-strained twinning-induced plasticity steel
T2 - From initiation at a small defect to failure
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 (JP16H06365 and JP17H04956).
PY - 2021/4/15
Y1 - 2021/4/15
N2 - Hydrogen-assisted crack growth of pre-strained twinning-induced plasticity (TWIP) steel was investigated using artificial defects (micro-drilled holes), which acted as artificial crack initiation sites. Hydrogen was introduced into the specimens by electrochemical hydrogen charging during slow strain rate tensile test. The quasi-cleavage crack propagation observed was due to repeated crack initiation near the crack tip and subsequent coalescence. Crack initiation near the crack tip occurred after plastic deformation of the crack tip, and pre-straining facilitated plasticity-driven crack initiation. The early stage of plasticity-driven crack growth was sensitive to the crack length and remote stress level. Accordingly, the crack growth rate in the early stage increased with the increase in the initial defect size. In the following stage of the crack growth, the crack growth rate exhibited a complicated trend with respect to the crack length, which is possibly due to the plastic-wake-altered stress field around the crack tip, which depends on the initial defect size.
AB - Hydrogen-assisted crack growth of pre-strained twinning-induced plasticity (TWIP) steel was investigated using artificial defects (micro-drilled holes), which acted as artificial crack initiation sites. Hydrogen was introduced into the specimens by electrochemical hydrogen charging during slow strain rate tensile test. The quasi-cleavage crack propagation observed was due to repeated crack initiation near the crack tip and subsequent coalescence. Crack initiation near the crack tip occurred after plastic deformation of the crack tip, and pre-straining facilitated plasticity-driven crack initiation. The early stage of plasticity-driven crack growth was sensitive to the crack length and remote stress level. Accordingly, the crack growth rate in the early stage increased with the increase in the initial defect size. In the following stage of the crack growth, the crack growth rate exhibited a complicated trend with respect to the crack length, which is possibly due to the plastic-wake-altered stress field around the crack tip, which depends on the initial defect size.
KW - Crack propagation
KW - Hydrogen embrittlement
KW - Pre-strain
KW - Quasi-cleavage
KW - Twinning-induced plasticity steel
UR - http://www.scopus.com/inward/record.url?scp=85105116119&partnerID=8YFLogxK
U2 - 10.2355/isijinternational.ISIJINT-2019-510
DO - 10.2355/isijinternational.ISIJINT-2019-510
M3 - Article
AN - SCOPUS:85105116119
VL - 61
SP - 1278
EP - 1286
JO - ISIJ international
JF - ISIJ international
SN - 0915-1559
IS - 4
ER -