TY - JOUR
T1 - Three-dimensional studies of intergranular carbides in austenitic stainless steel
AU - Ochi, Minoru
AU - Kawano, Rika
AU - Maeda, Takuya
AU - Sato, Yukio
AU - Teranishi, Ryo
AU - Hara, Toru
AU - Kikuchi, Masao
AU - Kaneko, Kenji
N1 - Publisher Copyright:
© The Author 2016.
PY - 2017/4/1
Y1 - 2017/4/1
N2 - A large number of morphological studies of intergranular carbides in steels have always been carried out in two dimensions without considering their dispersion manners. In this article, focused ion beam serial-sectioning tomography was carried out to study the correlation among the grain boundary characteristics, the morphologies and the dispersions of intergranular carbides in 347 austenitic stainless steel. More than hundred intergranular carbides were characterized in three dimensions and finally classified into three different types, two types of carbides probably semi-coherent to one of the neighboring grains with plate-type morphology, and one type of carbides incoherent to both grains with rod-type morphology. In addition, the rod-type carbide was found as the largest number of carbides among three types. Since large numbers of defects, such as misfit dislocations, may be present at the grain boundaries, which can be ideal nucleation sites for intergranular rod-type carbide precipitation.
AB - A large number of morphological studies of intergranular carbides in steels have always been carried out in two dimensions without considering their dispersion manners. In this article, focused ion beam serial-sectioning tomography was carried out to study the correlation among the grain boundary characteristics, the morphologies and the dispersions of intergranular carbides in 347 austenitic stainless steel. More than hundred intergranular carbides were characterized in three dimensions and finally classified into three different types, two types of carbides probably semi-coherent to one of the neighboring grains with plate-type morphology, and one type of carbides incoherent to both grains with rod-type morphology. In addition, the rod-type carbide was found as the largest number of carbides among three types. Since large numbers of defects, such as misfit dislocations, may be present at the grain boundaries, which can be ideal nucleation sites for intergranular rod-type carbide precipitation.
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U2 - 10.1093/jmicro/dfw103
DO - 10.1093/jmicro/dfw103
M3 - Article
C2 - 27927874
AN - SCOPUS:85019174891
SN - 2050-5698
VL - 66
SP - 89
EP - 94
JO - Microscopy (Oxford, England)
JF - Microscopy (Oxford, England)
IS - 2
ER -