On the microstructural basis of cleavage fracture initiation in ferritic and bainitic steels

Timo Saario, Kim Wallin, Kari Törrönen

Research output: Contribution to journalArticleScientificpeer-review

25 Citations (Scopus)

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 languageEnglish
Pages (from-to)173 - 177
Number of pages5
JournalJournal of Engineering Materials and Technology, Transactions of the ASME
Volume106
Issue number2
DOIs
Publication statusPublished - 1984
MoE publication typeNot Eligible

Fingerprint

bainitic steel
Steel
cleavage
Ferritic steel
steels
Tensile stress
Carbides
critical loading
Crack propagation
crack propagation
tensile stress
carbides
Plastics
Microstructure
plastics
Geometry
microstructure
geometry

Cite this

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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.",
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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 journalArticleScientificpeer-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

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