Abstract
The microstructural basis of the critical tensile stress criterion of cleavage fracture is discussed. It is shown that cleavage can be carbide induced in bainitic steels as well as in ferritic steels. The plastic work expended in brittle crack propagation is shown to be somewhat smaller for bainitic steels than for ferritic steels. This is proposed to be caused by the much higher dislocation density of the bainitic microstructure. The statistical nature of the cleavage fracture initiation process is shown to result in a test piece geometry dependent cleavage fracture stress.
| Original language | English |
|---|---|
| Pages (from-to) | 173 - 177 |
| Number of pages | 5 |
| Journal | Journal of Engineering Materials and Technology, Transactions of the ASME |
| Volume | 106 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1984 |
| MoE publication type | Not Eligible |
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On the microstructural basis of cleavage fracture initiation in ferritic and bainitic steels. / Saario, Timo; Wallin, Kim; Törrönen, Kari.
In: Journal of Engineering Materials and Technology, Transactions of the ASME, Vol. 106, No. 2, 1984, p. 173 - 177.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - On the microstructural basis of cleavage fracture initiation in ferritic and bainitic steels
AU - Saario, Timo
AU - Wallin, Kim
AU - Törrönen, Kari
PY - 1984
Y1 - 1984
N2 - The microstructural basis of the critical tensile stress criterion of cleavage fracture is discussed. It is shown that cleavage can be carbide induced in bainitic steels as well as in ferritic steels. The plastic work expended in brittle crack propagation is shown to be somewhat smaller for bainitic steels than for ferritic steels. This is proposed to be caused by the much higher dislocation density of the bainitic microstructure. The statistical nature of the cleavage fracture initiation process is shown to result in a test piece geometry dependent cleavage fracture stress.
AB - The microstructural basis of the critical tensile stress criterion of cleavage fracture is discussed. It is shown that cleavage can be carbide induced in bainitic steels as well as in ferritic steels. The plastic work expended in brittle crack propagation is shown to be somewhat smaller for bainitic steels than for ferritic steels. This is proposed to be caused by the much higher dislocation density of the bainitic microstructure. The statistical nature of the cleavage fracture initiation process is shown to result in a test piece geometry dependent cleavage fracture stress.
U2 - 10.1115/1.3225695
DO - 10.1115/1.3225695
M3 - Article
VL - 106
SP - 173
EP - 177
JO - Journal of Engineering Materials and Technology, Transactions of the ASME
JF - Journal of Engineering Materials and Technology, Transactions of the ASME
SN - 0094-4289
IS - 2
ER -