Strength anisotropy and mixed mode fracture in heavily drawn pearlitic steel. Issue 11 (24th September 2013)

• Record Type: Journal Article
• Authors: Toribio, J.; González, B.; Matos, J. C.
• Other Names: Kotousov A. guestEditor.; Lazzarin P. guestEditor.
• Is Part Of: Fatigue & fracture of engineering materials & structures. Volume 36:Issue 11(2013:Nov.)
• Page Start: 1178
• Page End: 1186
• Publication Date: 2013-09-24
• Subjects: fracture path deflection -- heavily drawn pearlitic steel -- strength anisotropy; Materials -- Fatigue -- Periodicals; Fracture mechanics -- Periodicals; 620.1123
• DOI: 10.1111/ffe.12109
• Languages: English
• ISSNs: 8756-758X

Abstract

ABSTRACT: Steels with pearlitic microstructure exhibit strength anisotropy after cold drawing to increase the yield stress by a strain hardening mechanism. Such anisotropy manifests itself in the form of mixed mode propagation associated with crack deviation tending to axial growth following a path quasi‐parallel to the wire line (drawing axis) due to the drawing‐induced orientation of the pearlitic microstructure. This paper analyses the strength anisotropy of heavily cold‐drawn prestressing steel wires linked with three consequences: (i) crack deflection and mixed mode propagation; (ii) specific microscopic modes of fracture, including enlarged and oriented cleavage ; and (iii) a kind of directional toughness, associated with different deflection angles and distinct fracture micromechanisms.