ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 7

Effect of Prestrain on Fracture Toughness of Rolled Mild Steel with Significant Inclusion Content

Arora, PR
Senior Scientific Officer and Professor, Indian Institute of Science, Bangalore,

Raghavan, MR
Senior Scientific Officer and Professor, Indian Institute of Science, Bangalore,

Prasad, YVRK
Professor, Indian Institute of Science, Bangalore,

(Received 20 March 1987; accepted 13 November 1987)

Abstract

The basic method of J_Ic calculation using a single specimen is discussed. Dokouipil's approach for evaluating the J_Ic value is extended further and the effect of prestrain on rolled mild steel with significant inclusions is studied using this modified approach. Although this method does not give an accurate value of J_Ic, it is quite effective for a comparative study. While the fracture toughness of annealed and 7% prestrained materials are about the same, the fracture toughness of 3% prestrained material is significantly lower.

Keywords:
prestrain, mild steel, unloading compliance method, crack, crack extension, strain energy

Paper ID: JTE10382J
DOI: 10.1520/JTE10382J
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