Metallographic exploration of TWIP Steel

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Metallographic exploration of TWIP Steel

Popis výsledku v původním jazyce

Steels with 17-22 wt. % Mn and 0.6 wt. % C exhibit low stacking fault energy (SFE) at room temperature. The optimum recommended stacking fault energy value is between 18 and 30 mJ.m-2. During deformation, this causes mechanical twinning and, when combined with dislocation gliding, it leads to the twinninginduced plasticity phenomenon (TWIP). Exceptional mechanical properties in this TWIP alloy with facecentred cubic lattice are provided by the interaction between dislocation slip (reduced free path), mechanical twinning and the formation of complex microstructure (competing martensite formation (ε - martensite or α'-martensite). When compared with other steels used in automotive industry, such as HSLA, DP or TRIP, the TWIP-based steels exhibit a strain hardening coefficient n of 0.4 at low strains, which is a twice higher value. This strengthening effect results in tensile strength of approximately 1200 MPa, combined with increased elongation with peaks up to 70 %. Recently, these steels began to be used more widely, particularly in the automotive industry.

Název v anglickém jazyce

Metallographic exploration of TWIP Steel

Popis výsledku anglicky

Steels with 17-22 wt. % Mn and 0.6 wt. % C exhibit low stacking fault energy (SFE) at room temperature. The optimum recommended stacking fault energy value is between 18 and 30 mJ.m-2. During deformation, this causes mechanical twinning and, when combined with dislocation gliding, it leads to the twinninginduced plasticity phenomenon (TWIP). Exceptional mechanical properties in this TWIP alloy with facecentred cubic lattice are provided by the interaction between dislocation slip (reduced free path), mechanical twinning and the formation of complex microstructure (competing martensite formation (ε - martensite or α'-martensite). When compared with other steels used in automotive industry, such as HSLA, DP or TRIP, the TWIP-based steels exhibit a strain hardening coefficient n of 0.4 at low strains, which is a twice higher value. This strengthening effect results in tensile strength of approximately 1200 MPa, combined with increased elongation with peaks up to 70 %. Recently, these steels began to be used more widely, particularly in the automotive industry.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název statě ve sborníku

METAL 2012 Conference proceedings

ISBN

978-80-87294-31-4

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

446-452

Název nakladatele

Technická universita Ostrava - Vysoká škola báňská

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

23. 5. 2012

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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