Nature of delamination cracks in pearlitic steels

Nature of delamination cracks in pearlitic steels

Wire-drawn fully pearlitic steel was twisted at room temperature. As a result, a delamination crack propagated along the longitudinal direction of the wire. Backscattered electron and transmission electron microscopy images indicated that the cementite lamellae beneath the delamination crack had van...

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Bibliographic Details
Published in:Scripta materialia Vol. 112; pp. 32 - 36
Main Authors: Tanaka, Masaki, Saito, Hayato, Yasumaru, Motoki, Higashida, Kenji
Format: Journal Article
Language:English
Published: Elsevier Ltd 01-02-2016
Subjects:
Backscattering
Cementite
Delaminating
Delamination
Eutectic steel
Fracture
Fracture mechanics
Grain refining
Mechanical property
Plastic deformation
Severe plastic deformation (SPD)
Steels
Wire
Eutectic steel
Fracture
Severe plastic deformation (SPD)
Grain refining
Mechanical property
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Summary:Wire-drawn fully pearlitic steel was twisted at room temperature. As a result, a delamination crack propagated along the longitudinal direction of the wire. Backscattered electron and transmission electron microscopy images indicated that the cementite lamellae beneath the delamination crack had vanished. In addition, a fine-grained structure was observed. This indicated that the delamination fracture was not a brittle one but a shear one associated with local severe plastic deformation. [Display omitted]
Bibliography:ObjectType-Article-1
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ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2015.09.004