Stability of retained austenite in high-strength martensitic steels during cold deformation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F17%3A43931649" target="_blank" >RIV/49777513:23210/17:43931649 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.daaam.info/Downloads/Pdfs/proceedings/proceedings_2017/039.pdf" target="_blank" >http://www.daaam.info/Downloads/Pdfs/proceedings/proceedings_2017/039.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2507/28th.daaam.proceedings.039" target="_blank" >10.2507/28th.daaam.proceedings.039</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stability of retained austenite in high-strength martensitic steels during cold deformation

Popis výsledku v původním jazyce

The toughness of high-strength steels is improved when their martensitic matrix is combined with the presence of retained austenite. The stability of retained austenite is crucial, both upon cooling to room temperature and during subsequent cold deformation. One of the advanced heat treatment methods, which produces larger amounts of retained austenite in martensitic matrix thanks to an appropriate combination of parameters, is the Q&amp;P process (Quenching and Partitioning). It produces microstructures consisting of martensite and retained austenite which exhibit strengths above 2000 MPa and elongation levels of more than 10%. The steel which was designed for this experiment was alloyed with manganese, silicon, molybdenum and chromium and had a low Ms temperature. This experimental heat treatment led to a martensitic microstructure with retained austenite, with ultimate strengths in the range of 2200-2400 MPa and A5mm elongations of 7-10%. The largest fraction of retained austenite, according to X-ray diffraction analysis, was 10%. The behaviour of retained austenite under mechanical load was studied by means of compression tests to various strain levels. The resulting microstructures were observed using optical and scanning electron microscopes..

Název v anglickém jazyce

Stability of retained austenite in high-strength martensitic steels during cold deformation

Popis výsledku anglicky

The toughness of high-strength steels is improved when their martensitic matrix is combined with the presence of retained austenite. The stability of retained austenite is crucial, both upon cooling to room temperature and during subsequent cold deformation. One of the advanced heat treatment methods, which produces larger amounts of retained austenite in martensitic matrix thanks to an appropriate combination of parameters, is the Q&amp;P process (Quenching and Partitioning). It produces microstructures consisting of martensite and retained austenite which exhibit strengths above 2000 MPa and elongation levels of more than 10%. The steel which was designed for this experiment was alloyed with manganese, silicon, molybdenum and chromium and had a low Ms temperature. This experimental heat treatment led to a martensitic microstructure with retained austenite, with ultimate strengths in the range of 2200-2400 MPa and A5mm elongations of 7-10%. The largest fraction of retained austenite, according to X-ray diffraction analysis, was 10%. The behaviour of retained austenite under mechanical load was studied by means of compression tests to various strain levels. The resulting microstructures were observed using optical and scanning electron microscopes..

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 28th DAAAM International Symposium

ISBN

978-3-902734-11-2

ISSN

1726-9679

e-ISSN

neuvedeno

Počet stran výsledku

6

Strana od-do

289-294

Název nakladatele

DAAAM International

Místo vydání

Vienna

Místo konání akce

Zadar

Datum konání akce

8. 11. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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