A CVN-K(K_IC) correlation for H13 tool steels
by S.Z. Qamar, A.K. Sheikh, A.F.M. Arif
International Journal of Materials and Product Technology (IJMPT), Vol. 33, No. 4, 2008

Abstract: Fracture is the most common cause of die failure in hot extrusion. Prediction of fracture life requires a reasonably accurate determination of plane-strain fracture toughness (K_IC). Standard K(K_IC) testing is difficult, time-consuming, and costly. Charpy impact energy (CVN) is often used as an indirect measure of fracture toughness. Published CVN-K(K_IC) correlations do not generally apply to tool steels, and are not suitable for high temperature predictions. This paper is part of a study aimed at the development of a reasonable CVN-K(K_IC) correlation for the hot work tool steel H13, subjected to various tempering cycles and tested at different elevated temperatures, based on hardness and impact energy data.

Online publication date: Mon, 12-Jan-2009

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