Deformation-induced grain coalescence in an electrodeposited pure iron sheet studied by in situ neutron diffraction and electron backscatter diffraction

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• 作者：Y.H. Su^a ; ^b ; Y. Tomota^a ; ^{tomota@mx.ibaraki.ac.jp} ; S. Harjo^b ; Y. Adachi^c
• 关键词：Electrodeposited pure iron ; Tensile deformation ; Grain coalescence ; In situ neutron diffraction ; Electron backscatter diffraction
• 刊名：Acta Materialia
• 出版年：2012
• 期刊代码：1_13596454
• 类别：ms
• 出版时间：May, 2012
• 卷：60
• 期：8
• 页码：3393-3401
• 文件大小：2841 K

摘要

The plastic deformation behavior of an ultrafine-grained electrodeposited pure iron sheet with a strong {1 1 1}銆?em>h k l銆?texture was studied by in situ neutron diffraction during tensile deformation at room temperature and by electron backscatter diffraction (EBSD). The combination of volume-averaged crystallographic orientation changes determined by neutron diffraction and the local orientation relationship determined by EBSD reveals a texture change to {1 1 1}銆? 1 0銆?and corresponding microstructural changes with tension deformation. Related to such grain rotation, grain coalescence on deformation was found using semi in situ EBSD. The results obtained are explained using a characteristic slip model, which also gives a reason for the ultrahigh Lankford value of this material.