In-situ neutron diffraction analysis of phase transformation kinetics in TRIP steel

0048265 - ÚJF 2007 RIV CH eng J - Journal Article
Zrnik, J. - Muránsky, Ondrej - Lukáš, Petr - Šittner, Petr - Nový, Z.
In-situ neutron diffraction analysis of phase transformation kinetics in TRIP steel.
[In situ neutronová difrakční analýza kinetiky fázové transformace v TRIP oceli.]
Materials Science Forum. Roč. 502, - (2005), s. 339-344. ISSN 0255-5476
Institutional research plan: CEZ:AV0Z10480505; CEZ:AV0Z10100520
Keywords : TRIP steel * thermomechanical treatment * austenite transformation
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 0.399, year: 2005

The precise characterization of the multiphase microstructure of low alloyed TRIP steels is of great importance for the interpretation and optimisation of their mechanical properties. In-situ neutron diffraction experiment was employed for monitoring of conditioned austenite transformation to ferrite, and also for retained austenite stability evaluation during subsequent mechanical loading. The progress in austenite decomposition to ferrite is monitored at different transformation temperatures. The relevant information on the course of transformation is extracted from neutron diffraction spectra. The integrated intensities of austenite and ferrite neutron diffraction profiles over the time of transformation are then assumed as a measure of the volume fractions of both phases in dependence on transformation temperature. Useful information was also obtained on retained austenite stability in TRIP steel during mechanical testing.

In situ neutronový difrakční experiment byl využit pro studium austeniticko-feritické transformace v nízkolegované TRIP oceli v průběhu kombinovaného termomechanického zpracování. Stejná metoda byla užita i při studiu stability zbytkového austenitu v průběhu deformačního testu za pokojové teploty.
Permanent Link: http://hdl.handle.net/11104/0138937