Heterogeneous deformation in twinning-induced plasticity steel

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• 作者：B.C. De Cooman ; ^{decooman@postech.ac.kr} ; Jinkyung Kim ; Seil Lee
• 关键词：Steels ; Twinning ; Texture ; Dynamic strain aging
• 刊名：Scripta Materialia
• 出版年：2012
• 期刊代码：157_13596462
• 类别：et
• 出版时间：June, 2012
• 卷：66
• 期：12
• 页码：986-991
• 文件大小：860 K

摘要

The influence of deformation localization during tensile deformation on the development of crystallographic texture in twinning-induced plasticity (TWIP) steel is reported. Whereas Al-added TWIP steel deforms homogeneously before the critical strain of onset of serrations, plastic deformation in Al-free TWIP steel occurs by propagation of isolated Portevin-Le Chatelier bands from the early stage of plastic deformation. The crystallographic texture evolution of both steels is, however, very similar. Deformation leads to the development of a Cu-type texture characterized by the strengthening of the rotated Brass component rather than the pure Brass component.