Effect of microalloying elements and deformation mechanisms on the TWIP steels


Aydin H., Kazdal Zeytin H., Çimenoğlu H.

Extraction and Processing Division, EPD of the Minerals, Metals and Materials Society, TMS Held during TMS 2009 Annual Meeting and Exhibition, San Francisco, CA, United States Of America, 15 - 19 February 2009, pp.191-197 identifier

  • Publication Type: Conference Paper / Full Text
  • City: San Francisco, CA
  • Country: United States Of America
  • Page Numbers: pp.191-197
  • Keywords: Automotive steels, Characterization, Cold rolling, Deformation mechanisms, Hot rolling, Martensite, Stacking fault, Twinning
  • Istanbul Technical University Affiliated: Yes

Abstract

TWIP (Twinning-Induced Plasticity) steels have exceptionally good combinations of strength, ductility and damage tolerance which satisfy the recent requirements of automotive industries. Firstly, TWIP has the most beneficial effect on the work-hardening. It is believed that deformation twins increase the work-hardening rate by acting as obstacles against gliding dislocations. Moreover, TWIP steels have low to intermediate stacking fault energy and hence undergo extensive mechanical twinning during deformation, which in turn leads a good combination of both strength and ductility. To explain the mechanical characteristics and the mechanical behavior of the TWIP steels, we have been made some investigations and experiments that show the effects of microalloying elements and deformation mechanisms. In this study, three different compositions of TWIP steels have been produced. The microstructure and mechanical properties are characterized by using optical, electron microscopy and mechanical tests.