Morphological and chemical analysis of bainite in Cu-17Al-11Mn (At.%) alloys by using orthogonal FIB-SEM and double-EDS STEM

Shunichi Motomura, Toru Hara, Toshihiro Omori, Ryosuke Kainuma, Minoru Nishida

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

In this study, new microscopy techniques were developed for understanding the mechanism for the bainitic transformation in a Cu-17Al-11Mn (at%) alloy. An orthogonally arranged focused ion beam and a scanning electron microscope were employed to observe three-dimensional (3D) morphology of the bainite phase, in addition to compositional analysis by using a scanning transmission electron microscope equipped with a double-detector energy-dispersive X-ray spectrometer system. The 3D morphology of these samples was observed at different aging times and aging temperatures; the results obtained indicated that with increasing aging time and/or aging temperature, the bainite phase at the initial stage of formation exhibits a plate-like shape, which changes to a lenticular form. A habit plane was uniquely determined as ∼{9 3 2} by the combination of 3D image reconstruction and an electron back-scattered diffraction technique. The compositional analysis revealed the spatial distribution of the compositional variation between the bainite and matrix phases in the initial stages of the transformation. In the bainite phase, the Cu concentration was higher, while the concentrations of Al and Mn were lower than those in the surrounding matrix, indicative of the diffusion of the constituent elements with the growth of the bainite phase.

元の言語英語
ページ(範囲)243-252
ページ数10
ジャーナルMicroscopy
65
発行部数3
DOI
出版物ステータス出版済み - 6 28 2016

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bainite
Scanning Transmission Electron Microscopy
Bainite
chemical analysis
Energy dispersive spectroscopy
Electrons
Aging of materials
Scanning electron microscopy
scanning electron microscopy
Chemical analysis
Spatial Analysis
Temperature
Computer-Assisted Image Processing
Electron microscopes
electron microscopes
Habits
Bainitic transformations
Microscopy
Scanning
X ray spectrometers

All Science Journal Classification (ASJC) codes

  • Structural Biology
  • Instrumentation
  • Radiology Nuclear Medicine and imaging

これを引用

Morphological and chemical analysis of bainite in Cu-17Al-11Mn (At.%) alloys by using orthogonal FIB-SEM and double-EDS STEM. / Motomura, Shunichi; Hara, Toru; Omori, Toshihiro; Kainuma, Ryosuke; Nishida, Minoru.

:: Microscopy, 巻 65, 番号 3, 28.06.2016, p. 243-252.

研究成果: ジャーナルへの寄稿記事

Motomura, Shunichi ; Hara, Toru ; Omori, Toshihiro ; Kainuma, Ryosuke ; Nishida, Minoru. / Morphological and chemical analysis of bainite in Cu-17Al-11Mn (At.%) alloys by using orthogonal FIB-SEM and double-EDS STEM. :: Microscopy. 2016 ; 巻 65, 番号 3. pp. 243-252.
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abstract = "In this study, new microscopy techniques were developed for understanding the mechanism for the bainitic transformation in a Cu-17Al-11Mn (at{\%}) alloy. An orthogonally arranged focused ion beam and a scanning electron microscope were employed to observe three-dimensional (3D) morphology of the bainite phase, in addition to compositional analysis by using a scanning transmission electron microscope equipped with a double-detector energy-dispersive X-ray spectrometer system. The 3D morphology of these samples was observed at different aging times and aging temperatures; the results obtained indicated that with increasing aging time and/or aging temperature, the bainite phase at the initial stage of formation exhibits a plate-like shape, which changes to a lenticular form. A habit plane was uniquely determined as ∼{9 3 2} by the combination of 3D image reconstruction and an electron back-scattered diffraction technique. The compositional analysis revealed the spatial distribution of the compositional variation between the bainite and matrix phases in the initial stages of the transformation. In the bainite phase, the Cu concentration was higher, while the concentrations of Al and Mn were lower than those in the surrounding matrix, indicative of the diffusion of the constituent elements with the growth of the bainite phase.",
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