Talks and Poster Presentations (with Proceedings-Entry):
S. Zamberger, E. Kozeschnik:
"Precipitation in Tempered Martensite - Simulation and Experiment";
Talk: THERMEC 2011, International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS Processing, Fabrication, Properties, Applications,
Quebec - Canada;
2011-08-01
- 2011-08-05; in: "THERMEC 2011",
Materials Science Forum / Trans Tech Publications,
706-709
(2012),
ISSN: 1662-9752;
1586
- 1591.
English abstract:
Precipitation in Tempered Martensite - Simulation and Experiment
S. Zamberger*, E. Kozeschnik **
* voestalpine Stahl Donawitz GmbH & Co KG, Kerpelystrasse 199, 8700 Leoben, Austria
** Christian Doppler Laboratory `Early Stages of Precipitation´, Institute of Materials Science and Technology, Vienna University of Technology,
Email: sabine.zamberger@voestalpine.com; ernst.kozeschnik@tuwien.ac.at
Tempering of martensite is a standardized heat treatment to optimize the mechanical properties of un- and low-alloyed C-steel. The precipitation mechanisms in martensite are complex and have been investigated experimentally numerous times. The evolution of the precipitate microstructure is characterized by sequences of transitions from metastable to stable phases. Apart from the effect of precipitates on fine grain hardening and precipitation strengthening, the precipitation behaviour of quenched steels during tempering and its prediction is of great interest for steels in sour service applications, like OCTG, since it is well known that precipitates influence hydrogen induced embrittlement and sulphide stress cracking performance.
In the present work, the precipitation behaviour of two low alloyed, quenched and tempered steels with 0.3wt% C is investigated experimentally and by computer simulation. One steel grade is V microalloyed, the other type contains additions Nb and Ti. The specimens are analyzed by means of transmission electron microscopy using selected area diffraction (SAD) and energy dispersive x-ray spectroscopy (EDX). The numerical simulation is performed with the thermo-kinetic software package MatCalc, where the precipitation kinetics is analyzed for the experimentally applied thermo-mechanical cycles. Good agreement between experiment and simulation is obtained and the experimentally observed precipitate microstructure can be well explained on the basis of these simulations.
TOPIC : MODELLING & SIMULATION PRESENTATION : ORAL
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.4028/www.scientific.net/MSF.706-709.1586
Created from the Publication Database of the Vienna University of Technology.