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Metals 2016, 6(2), 40; doi:10.3390/met6020040

Predicted Fracture Behavior of Shaft Steels with Improved Corrosion Resistance

1
Department of Marine Engineering and Ship Power Systems, Faculty of Maritime Studies Rijeka, University of Rijeka, Rijeka 51000, Croatia
2
Department of Engineering Mechanics, Faculty of Engineering, University of Rijeka, Rijeka 51000, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 14 January 2016 / Revised: 4 February 2016 / Accepted: 14 February 2016 / Published: 19 February 2016
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Abstract

One of the crucial steps in the shaft design process is the optimal selection of the material. Two types of shaft steels with improved corrosion resistances, 1.4305 and 1.7225, were investigated experimentally and numerically in this paper in order to determine some of the material characteristics important for material selection in the engineering design process. Ultimate tensile strength and yield strength have been experimentally obtained, proving that steel 1.4305 has higher values of both. In addition, J-integral is numerically determined as a measure of crack driving force for finite element models of standardized fracture specimens (single-edge notched bend and disc compact tension). Obtained J values are plotted versus specimen crack growth size (Δa) for different specimen geometries (a/W). Higher resulting values of J-integral for steel 1.4305 as opposed to 1.7225 can be noted. Results can be useful as a fracture parameter in fracture toughness assessment, although this procedure differs from experimental analysis. View Full-Text
Keywords: steel 1.4305; steel 1.7225; fracture steel 1.4305; steel 1.7225; fracture
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Vukelic, G.; Brnic, J. Predicted Fracture Behavior of Shaft Steels with Improved Corrosion Resistance. Metals 2016, 6, 40.

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