Strain Hardening Behavior of Dual-Phase Steels

A detailed qualitative and quantitative examination of the microstructure and mechanical properties of three different classes of DP600 and DP450 dual-phase (DP) steels was carried out. The tested DP steels are characterized by different alloying elements: aluminum, boron, and phosphorus. Among them...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2009-11, Vol.40 (11), p.2557-2567
Main Authors: Colla, V., De Sanctis, M., Dimatteo, A., Lovicu, G., Solina, A., Valentini, R.
Format: Article
Language:English
Subjects:
Aluminum
Applied sciences
Characterization and Evaluation of Materials
Chemical elements
Chemistry and Materials Science
Cooling
Deformation
Exact sciences and technology
Materials Science
Mechanical properties
Metallic Materials
Metals. Metallurgy
Microscopy
Nanotechnology
Phosphorus
Steel
Strain hardening
Stress-strain curves
Structural Materials
Surfaces and Interfaces
Thin Films
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Summary:A detailed qualitative and quantitative examination of the microstructure and mechanical properties of three different classes of DP600 and DP450 dual-phase (DP) steels was carried out. The tested DP steels are characterized by different alloying elements: aluminum, boron, and phosphorus. Among them, aluminum DP steels showed the lowest percentages of hard phases, while phosphorus DP steels exhibited the highest resistance values. The Hollomon, Pickering, Crussard–Jaoul (CJ), and Bergstrom models were used to reproduce the strain hardening behavior of DP steels. Relationships that correlate the fitting parameters with the chemical composition and the thermal cycle parameters were found, and the predictive abilities of different models were evaluated. The Pickering equation, among the tested models, is the best one in the reproduction of the experimental stress-strain data.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-009-9975-1