Investigation of nanoscale twinning in an advanced high manganese twinning-induced plasticity steel

P. Kürnsteiner, C. Commenda, E. Arenholz, L. Samek, D. Stifter, H. Groiss

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A twinning induced plasticity (TWIP) steel, developed for automotive applications, was characterized down to the nanoscale to investigate the nature of the strengthening mechanisms. Both tensile-deformed and non-deformed materials were studied by light optical microscopy, X-ray diffraction, electron backscatter diffraction, and transmission electron microscopy. The investigated TWIP steel showed extensive twinning upon deformation. With high-resolution transmission electron microscopy, nano-twins as small as 3 nm in width were observed, and large-angle convergent-beam electron diffraction identified the pole mechanism as one of the twinning mechanisms in this TWIP steel. This study emphasizes that a thoughtful combination of techniques is necessary to fully capture the microstructure of this TWIP steel and explain the origin of superior mechanical properties compared to other TWIP steel grades.

Original languageEnglish
Pages (from-to)70-77
Number of pages8
JournalMaterialia
Volume1
DOIs
Publication statusPublished - Sep 2018

Keywords

  • Dislocations
  • EBSD
  • Microstructure
  • TEM
  • TWIP

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