Acta Stereologica

0351-580X

 

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Jan Cwajna, Janusz Szala & Jerzy Herian

Quantitative description of dual-phase steel microstructure

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Abstract

The effect ofprior cold working on dual-phase steel C-Mn-Si-V type microstructure was analysed with an application of quantitative metallography and statistical methods. The paper includes a proposal of terminology and notation unification of stereological parameters. Some improvements and supplements of dual-phase (D-P) steel microstructure description are suggested. The diagrams and empirical quations showing the effect of prior cold work ratio on volume fraction, size, shape and distribution of phases are presented. The main conclusion drawn from the performed investigations is that the magnitude of prior cold working significantly affects size and shape distributions of both ferritic grains and martensitic islands as well as the inhomogeneity of martensitic islands distribution. It was found that prior cold work ratio of 65-75%, leading to the significant refinement of microstructure and its homogenization, ensures the best combination of D-P steel strength and ductility.

Keywords : dual-phase steel, prior cold working, quantitative metallography

To cite this article

Jan Cwajna, Janusz Szala & Jerzy Herian, «Quantitative description of dual-phase steel microstructure», Acta Stereologica [En ligne], Volume 13 (1994), Number 2 - Proceedings of the sixth European congress for stereology - Part three - June 1994, 433-438 URL : https://popups.ulg.ac.be/0351-580x/index.php?id=1300.

About: Jan Cwajna

Silesian University of Technology, Department of Materials Science, Krasiriskiego 8, PL-40-O18 KATOWICE, POLAND

About: Janusz Szala

Silesian University of Technology, Department of Materials Science, Krasiriskiego 8, PL-40-O18 KATOWICE, POLAND

About: Jerzy Herian

Silesian University of Technology, Department of Mechanics and Plastic Working Technology, Krasiriskiego 8, PL-40-O18 KATOWICE, POLAND