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Metals 2016, 6(12), 318; doi:10.3390/met6120318

Influence of Microstructure on Strength and Ductility in Fully Pearlitic Steels

Fracture & Structural Integrity Research Group, University of Salamanca, E.P.S., Campus Viriato, Avda. Requejo 33, Zamora 49022, Spain
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Academic Editor: Hugo F. Lopez
Received: 24 October 2016 / Revised: 29 November 2016 / Accepted: 5 December 2016 / Published: 15 December 2016
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Abstract

This article deals with the relationship between the microstructure and both strength and ductility in eutectoid pearlitic steel. It is seen how standard mechanical properties and fracture micromechanisms are affected by heat treatment and the resulting microstructure in the material. The yield stress, the ultimate tensile strength and the ductility (measured by means of the reduction in area) exhibit a rising trend with the increasing cooling rate (associated with smaller pearlite interlamellar spacing and a lower pearlitic colony size), while the strain for maximum load shows a decreasing tendency with the afore-said rising cooling rate. With regard to the fracture surface, its appearance becomes more brittle for lower cooling rates, so that the fracture process zone exhibits a larger area with observable pearlite lamellae and a lower percentage of microvoids. View Full-Text
Keywords: pearlitic steels; heat treatments; strength; ductility; fracture surface; fracture micromechanisms pearlitic steels; heat treatments; strength; ductility; fracture surface; fracture micromechanisms
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Toribio, J.; González, B.; Matos, J.-C.; Ayaso, F.-J. Influence of Microstructure on Strength and Ductility in Fully Pearlitic Steels. Metals 2016, 6, 318.

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