Abstract
Temperature dependence of the absorbed impact energy in fully pearlitic steels was investigated. Two-step brittle-to-ductile transitions were observed. The value of the activation energy associated with the first transition is comparable to that of low carbon ferritic steels, indicating that the first transition is the brittle-to-ductile transition of ferrite phase in pearlitic steels. It suggests that the first transition is controlled by the dislocation glide in ferrite. The value of the activation energy associated with the second transition is higher than that of the first transition. Micrographs of fracture surfaces and side surfaces after fracture tests suggest that the activation energy associated with the second transition should relate to the deformability of cementite in pearlite, that is, the second transition is controlled by the dislocation activity in cementite of pearlite.
| Original language | English |
|---|---|
| Pages (from-to) | 383-387 |
| Number of pages | 5 |
| Journal | Materials Science and Engineering A |
| Volume | 611 |
| DOIs | |
| Publication status | Published - Aug 12 2014 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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Brittle-to-ductile transitions and its relation to the deformability of cementite in fully pearlitic steels. / Sirithanakorn, Thiti; Tanaka, Masaki; Higashida, Kenji.
In: Materials Science and Engineering A, Vol. 611, 12.08.2014, p. 383-387.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Brittle-to-ductile transitions and its relation to the deformability of cementite in fully pearlitic steels
AU - Sirithanakorn, Thiti
AU - Tanaka, Masaki
AU - Higashida, Kenji
PY - 2014/8/12
Y1 - 2014/8/12
N2 - Temperature dependence of the absorbed impact energy in fully pearlitic steels was investigated. Two-step brittle-to-ductile transitions were observed. The value of the activation energy associated with the first transition is comparable to that of low carbon ferritic steels, indicating that the first transition is the brittle-to-ductile transition of ferrite phase in pearlitic steels. It suggests that the first transition is controlled by the dislocation glide in ferrite. The value of the activation energy associated with the second transition is higher than that of the first transition. Micrographs of fracture surfaces and side surfaces after fracture tests suggest that the activation energy associated with the second transition should relate to the deformability of cementite in pearlite, that is, the second transition is controlled by the dislocation activity in cementite of pearlite.
AB - Temperature dependence of the absorbed impact energy in fully pearlitic steels was investigated. Two-step brittle-to-ductile transitions were observed. The value of the activation energy associated with the first transition is comparable to that of low carbon ferritic steels, indicating that the first transition is the brittle-to-ductile transition of ferrite phase in pearlitic steels. It suggests that the first transition is controlled by the dislocation glide in ferrite. The value of the activation energy associated with the second transition is higher than that of the first transition. Micrographs of fracture surfaces and side surfaces after fracture tests suggest that the activation energy associated with the second transition should relate to the deformability of cementite in pearlite, that is, the second transition is controlled by the dislocation activity in cementite of pearlite.
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U2 - 10.1016/j.msea.2014.06.007
DO - 10.1016/j.msea.2014.06.007
M3 - Article
VL - 611
SP - 383
EP - 387
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -