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Evolution of microstructure and texture associated with ridging in ferritic stainless steels

Title
Evolution of microstructure and texture associated with ridging in ferritic stainless steels
Authors
Park, SHKim, KYLee, YDPark, CG김규영
Date Issued
Jan-2002
Publisher
TRANS TECH PUBLICATIONS LTD
Abstract
The evolution of microstructure and texture in two ferritic stainless steels was investigated in order to identify the existence of grain colonies associated with ridging and their origin. Special attentions were placed upon examining how the columnar crystals with an initial [001]//ND orientation in continuously-cast slabs can affect the formation of the grain colonies or band structures in the cold-rolled sheet specimens. The rolling and recrystallization textures at each process stage were examined by the orientation distribution function (ODF). Micro-texture measurements using an electron back-scattered diffraction (EBSD) technique were carried out on the ND, RD, and TD section, respectively. The existence of grain colonies having both {001} <110> and {112}<110> orientations at the central region of the sheets was clearly identified. These orientations were caused by both the crystal rotation toward alpha-fibre texture, which is stable orientation during rolling and the suppressed recrystallization. The relation between the presence of grain colonies and ridging phenomena was discussed.
Keywords
EBSD; ferritic stainless steel; grain colony; microtexture; ridging
URI
http://oasis.postech.ac.kr/handle/2014.oak/18891
ISSN
0255-5476
Article Type
PROCEEDINGS PAPER
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