Modelling ductile fracture behaviour from deformation parameters in HSLA steels

Sivaprasad, S and Tarafder, S and Ranganath, V R and Ray, K K (2004) Modelling ductile fracture behaviour from deformation parameters in HSLA steels. Fatigue & Fracture of Engineering Materials & Structures, 27 (10). pp. 897-909.

Restricted to NML users only. Others may use ->



In this work, an attempt is made to model the ductile fracture behaviour of two Cu-strengthened high strength low alloy (HSLA) steels through the understanding of their deformation behaviour. The variations in deformation behaviour are imparted by prior deformation of steels to various predetermined strains. The variations in parameters such as yield strength and true uniform elongation with prior deformation is studied and was found to be analogous to that of initiation fracture toughness determined by independent method. A unique method is used to measure the crack tip deformation characterized by stretch zone depth that also depicted a similar trend. Fracture toughness values derived from the stretch zone depth measurements were found to vary in the same fashion as the experimental values. A semiempirical relationship for obtaining ductile fracture toughness from basic deformation parameters is derived and model is demonstrated to estimate initiation ductile fracture toughness accurately.

Item Type:Article
Official URL/DOI:http://10.1111/j.1460-2695.2004.00805.x
Uncontrolled Keywords:deformation effect; ductile fracture toughness; HSLA steels; semiempirical model; stretch zone depth
Divisions:Material Science and Technology
ID Code:1311
Deposited By:Dr. A K Sahu
Deposited On:26 Jul 2010 12:32
Last Modified:09 Feb 2012 16:51
Related URLs:

Repository Staff Only: item control page