Three-dimensional studies of intergranular carbides in austenitic stainless steel

Minoru Ochi, Rika Kawano, Takuya Maeda, Yukio Sato, Ryo Teranishi, Toru Hara, Masao Kikuchi, Kenji Kaneko

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)89-94
Number of pages6
JournalMicroscopy
Volume66
Issue number2
DOIs
Publication statusPublished - Apr 1 2017

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austenitic stainless steels
Steel
Stainless Steel
Austenitic stainless steel
carbides
Carbides
Tomography
Ions
rods
Grain boundaries
grain boundaries
austenitic steel
Focused ion beams
Dislocations (crystals)
Dispersions
Nucleation
tomography
ion beams
nucleation
steels

All Science Journal Classification (ASJC) codes

  • Structural Biology
  • Instrumentation
  • Radiology Nuclear Medicine and imaging

Cite this

Three-dimensional studies of intergranular carbides in austenitic stainless steel. / Ochi, Minoru; Kawano, Rika; Maeda, Takuya; Sato, Yukio; Teranishi, Ryo; Hara, Toru; Kikuchi, Masao; Kaneko, Kenji.

In: Microscopy, Vol. 66, No. 2, 01.04.2017, p. 89-94.

Research output: Contribution to journalArticle

Ochi, Minoru ; Kawano, Rika ; Maeda, Takuya ; Sato, Yukio ; Teranishi, Ryo ; Hara, Toru ; Kikuchi, Masao ; Kaneko, Kenji. / Three-dimensional studies of intergranular carbides in austenitic stainless steel. In: Microscopy. 2017 ; Vol. 66, No. 2. pp. 89-94.
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