Journal of Production Engineering

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Vol. 3 No. 3 (1986): Former "Proceedings of the Institute of Production Engineering"
Original Research Article

Fatigue crack initiation and growth of tool steel Č.4751

Katarina Gerić
University of Novi Sad, Faculty of Technical Sciences, Departman for Production Engineering, Trg Dositeja Obradovica 6, 21000 Novi Sad, Serbia

Published 1986-09-01

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How to Cite

Gerić, K., & Šiđanin, L. (1986). Fatigue crack initiation and growth of tool steel Č.4751. Journal of Production Engineering, 3(3), 49–59. https://doi.org/10.24867/JPE-1986-03-049

Abstract

The conditions for fatigue crack initiation and propagation in double and triple tempered tool steel .4751 have been investigated. Fatigue crack initiation was analyzed as a function of the ΔK parameter. It was observed that the minimum value of (ΔK/Δσ)th decreased from 620 to 499 MPa with an increasing notch tip radius from 0.4 to 1.5 mm for double-tempered steel and from 620 to 537 MPa for triple-tempered steel, respectively. The fatigue crack growth rate, as a function of stress intensity range for both tempered conditions, was found to follow a relationship as predicted by Paris.

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