Cold rolling behaviour of an austenitic Fe–30Mn–3Al–3Si TWIP-steel: the importance of deformation twinning

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• 作者：Vercammen ; S. ; Blanpain ; B. ; De Cooman ; B.C. ; Wollants ; P.
• 关键词：Twinning ; Texture ; Cold rolling ; TEM ; Stacking fault energy
• 刊名：Acta Materialia
• 出版年：2004
• 期刊代码：1_13596454
• 类别：ms
• 出版时间：April 19, 2004
• 卷：52
• 期：7
• 页码：2005-2012
• 文件大小：888 K

摘要

The present paper deals with the evolution of microstructure and texture of a TWIP-steel during cold rolling. With increasing strains, different deformation mechanisms become active. TEM observations show the presence of deformation twinning at low strains (?<0.1). As the strain increases the volume fraction of twins increases. At higher strain levels, non-homogeneous deformation mechanisms such as shear band formation become active. This evolution of the microstructure is reflected in the formation of the texture. The brass orientation {110}border=0 SRC=/images/glyphs/BDA.GIF>112border=0 SRC=/images/glyphs/BEA.GIF> is dominant at every strain level. Its intensity increases as strain increases, while additional texture components develop at different strain levels: the E {111}border=0 SRC=/images/glyphs/BDA.GIF>110border=0 SRC=/images/glyphs/BEA.GIF> and F orientation {111}border=0 SRC=/images/glyphs/BDA.GIF>112border=0 SRC=/images/glyphs/BEA.GIF> as well as the S orientation {123}border=0 SRC=/images/glyphs/BDA.GIF>634border=0 SRC=/images/glyphs/BEA.GIF>. Compared to these orientations the copper orientation intensity remains rather low.