Abstract
Our first-principles calculations demonstrate that hydrogen is more stable in carbon supersaturated martensite than in α‑iron, due to the carbon-induced tetragonality in martensite lattice. The trapped hydrogen leads to remarkable decohesion between (110) planes both inside the martensite and along the martensite/ferrite interface, with the former being more significant than the latter. This decohesion can explain recent precise observations that in martensite/ferrite dual-phase steels the hydrogen-promoted crack was initiated in the martensite region and that in lath martensite steel it propagated not on lath boundaries but showed quasi-cleavage feature along (110) planes at very high hydrogen concentration.
| Original language | English |
|---|---|
| Pages (from-to) | 79-83 |
| Number of pages | 5 |
| Journal | Scripta Materialia |
| Volume | 149 |
| DOIs | |
| Publication status | Published - May 1 2018 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
Cite this
Hydrogen trapping in carbon supersaturated α‑iron and its decohesion effect in martensitic steel. / Geng, W. T.; Wang, Vei; Li, Jin Xu; Ishikawa, Nobuyuki; Kimizuka, Hajime; Tsuzaki, Kaneaki; Ogata, Shigenobu.
In: Scripta Materialia, Vol. 149, 01.05.2018, p. 79-83.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hydrogen trapping in carbon supersaturated α‑iron and its decohesion effect in martensitic steel
AU - Geng, W. T.
AU - Wang, Vei
AU - Li, Jin Xu
AU - Ishikawa, Nobuyuki
AU - Kimizuka, Hajime
AU - Tsuzaki, Kaneaki
AU - Ogata, Shigenobu
PY - 2018/5/1
Y1 - 2018/5/1
N2 - Our first-principles calculations demonstrate that hydrogen is more stable in carbon supersaturated martensite than in α‑iron, due to the carbon-induced tetragonality in martensite lattice. The trapped hydrogen leads to remarkable decohesion between (110) planes both inside the martensite and along the martensite/ferrite interface, with the former being more significant than the latter. This decohesion can explain recent precise observations that in martensite/ferrite dual-phase steels the hydrogen-promoted crack was initiated in the martensite region and that in lath martensite steel it propagated not on lath boundaries but showed quasi-cleavage feature along (110) planes at very high hydrogen concentration.
AB - Our first-principles calculations demonstrate that hydrogen is more stable in carbon supersaturated martensite than in α‑iron, due to the carbon-induced tetragonality in martensite lattice. The trapped hydrogen leads to remarkable decohesion between (110) planes both inside the martensite and along the martensite/ferrite interface, with the former being more significant than the latter. This decohesion can explain recent precise observations that in martensite/ferrite dual-phase steels the hydrogen-promoted crack was initiated in the martensite region and that in lath martensite steel it propagated not on lath boundaries but showed quasi-cleavage feature along (110) planes at very high hydrogen concentration.
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UR - http://www.scopus.com/inward/citedby.url?scp=85042351463&partnerID=8YFLogxK
U2 - 10.1016/j.scriptamat.2018.02.025
DO - 10.1016/j.scriptamat.2018.02.025
M3 - Article
AN - SCOPUS:85042351463
VL - 149
SP - 79
EP - 83
JO - Scripta Materialia
JF - Scripta Materialia
SN - 1359-6462
ER -