High Strength High Ductility Low Alloyed Steel

Annealed Martensite Matrix (AMM) concept was studied on two steel grades with low alloyed base composition of Fe-C-Mn-Si and two levels of Nb. Conditions for the thermal treatments were selected based on the experimental dilatometry tests and thermodynamic calculations. Annealing trials with short a...

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Veröffentlicht in:Materials science forum 2018-12, Vol.941, p.100-105
Hauptverfasser: Oberbillig, Carla, Kegel, Frédéric, Arlazarov, Artem, Hell, Jean-Christophe
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Kegel, Frédéric
Arlazarov, Artem
Hell, Jean-Christophe
description Annealed Martensite Matrix (AMM) concept was studied on two steel grades with low alloyed base composition of Fe-C-Mn-Si and two levels of Nb. Conditions for the thermal treatments were selected based on the experimental dilatometry tests and thermodynamic calculations. Annealing trials with short austempering holding were performed in the laboratory salt pots. Mechanical properties of heat treated steels have been investigated by tensile tests. Associated microstructures have been analyzed using Scanning Electron Microscopy as well as magnetization saturation method for measuring retained austenite fractions. Excellent strength-ductility balance was obtained due to the ultra-fine multiphase structure and high amount of stable retained austenite.
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subjects Annealing
Austempering
Austenite
Dilatometry
Ductility
Ductility tests
Heat treatment
Low alloy steels
Manganese
Martensite
Mechanical properties
Niobium
Retained austenite
Scanning electron microscopy
Tensile tests
title High Strength High Ductility Low Alloyed Steel
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