書誌事項
- タイトル別名
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- Two-dimensional Defect Map for the Deformed Pure Iron Samples by Positron Probe Microanalyzer
- ヨウデンシ プローブマイクロアナライザー ニ ヨル ソセイ ヘンケイ シタ ジュンテツ ノ クウコウガタ ケッカン マップ
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We have developed positron probe microanalyzer (PPMA) for obtaining two-dimensional map of open-volume type defects. The primary positron beam with 4 mm diameter was guided in a static magnetic field, followed by focusing to the Ni(100) foil with 150 nm thick for the brightness enhancement. The remoderated positron beam re-emitted from the Ni foil was accelerated and focused to the specimen by the magnetic objective lens. The focused beam diameter was estimated to be 14.5 μm. PPMA has been applied to investigate the defect behavior in a plastic deformation for polycrystalline high-purity Fe and Fe–0.5mass%Cu alloy samples, and Doppler broadening of the positron annihilation line has been used to map the defect distribution. The results showed that the defects were heterogeneously introduced by deformation and the concentration of the defects was high in a necking region. This can be attributed to the inhomogeneous deformation in the polycrystalline sample. A formation of vacancy clusters in the vicinity of the fractured point is suggested by a large change in Doppler broadening of the positron annihilation line. It has been, further, proven that Cu precipitation in Fe–0.5Cu alloys by annealing is enhanced by the defects induced by a plastic deformation.
収録刊行物
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- 鉄と鋼
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鉄と鋼 97 (5), 266-272, 2011
一般社団法人 日本鉄鋼協会
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詳細情報 詳細情報について
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- CRID
- 1390001205127818240
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- NII論文ID
- 130000673794
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- NII書誌ID
- AN10528571
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- ISSN
- 1341688X
- 18832954
- 00211575
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- COI
- 1:CAS:528:DC%2BC3MXlslams7k%3D
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- NDL書誌ID
- 11111272
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可