Metallographic exploration of TWIP Steel

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F12%3A00239395" target="_blank" >RIV/68407700:21220/12:00239395 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Metallographic exploration of TWIP Steel
Original language description
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.
Czech name
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Czech description
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Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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