ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 13

Correlation of Data from Standard and Precracked Charpy Specimens with Fracture Toughness Data for HY-130, A517-F, and HY-80 Steel

Sovak, JF
Research engineer, U.S. Steel Corp., Research Laboratory, Monroeville, PA

Abstract

Fracture toughness data were obtained for three constructional alloy steels having yield strengths of 958, 752, and 552 MPa (139, 109, and 80 ksi) (HY-130, A517(F) [Unified Numbering System UNS K11576], and HY-80, respectively) by testing conventional Charpy V-notch (CVN), fatigue-precracked Charpy, and plane-strain fracture toughness K_Ic specimens. The data were used to evaluate proposed correlations between K_Ic data and data obtained with Charpy-type specimens and to develop additional correlations. Of the five correlations examined, a method based on standard CVN results that incorporated a temperature shift to relate impact to static data gave slightly better estimates of K_Ic values in the transition temperature region than the others. However, the best results over the widest temperature range were obtained from a correlation method based on a J integral estimation that predicts K_Ic values from the results of slow-bend tests of fatigue-precracked Charpy-type specimens.

Keywords:
correlation techniques, fracture tests, transition temperature, stress intensity factors, J integral, toughness, bend tests, steels

Paper ID: JTE10244J
DOI: 10.1520/JTE10244J
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