The Role of Constraint and Warm Pre-Stress on Brittle Fracture in Ferritic Steels

Abstract:

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This paper presents the results of an experimental and numerical study carried out to investigate the effect of warm pre-stressing on cleavage fracture in ferritic steels using cracked and notched specimens. It is shown that the local approach based on Weibull theory predicts the increase in toughness following warm pre-stressing in highly constrained geometries. The observed effect of pre-loading in low constraint specimens such as round notched bars is less. The local approach could not predict the differences and it is suggested that the variation of triaxiality factor, the ratio of hydrostatic stress to Von Mises, in the plastic zone, is a contributing factor.

Info:

Periodical:

Key Engineering Materials (Volumes 261-263)

Edited by:

Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka

Pages:

177-182

DOI:

10.4028/www.scientific.net/KEM.261-263.177

Citation:

A. Mirzaee-Sisan et al., "The Role of Constraint and Warm Pre-Stress on Brittle Fracture in Ferritic Steels", Key Engineering Materials, Vols. 261-263, pp. 177-182, 2004

Online since:

April 2004

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$35.00

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