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

被引：6
|
作者：
Kuernsteiner, P. [1 ,2 ]
Commenda, C. [3 ]
Arenholz, E. [3 ]
Samek, L. [3 ,4 ]
Stifter, D. [1 ]
Groiss, H. [1 ]
机构：
[1] Johannes Kepler Univ Linz, Ctr Surface & Nanoanalyt ZONA, Altenbergerstr 69, A-4040 Linz, Austria
[2] Max Planck Inst Eisenforsch GmbH, Dept Microstruct Phys & Alloy Design, Max Planck Str 1, D-40237 Dusseldorf, Germany
[3] Voestalpine Stahl GmbH, Voestalpine Str 3, A-4031 Linz, Austria
[4] Univ Appl Sci Upper Austria, Met Sci, Stelzhamerstr 23, A-4600 Wels, Austria
来源：
MATERIALIA | 2018年 / 1卷
关键词：
TWIP; Microstructure; Dislocations; EBSD; TEM;
D O I：
10.1016/j.mtla.2018.04.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页码：70 / 77
页数：8
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