Aging Effect on Microstructure of Cold Groove-Rolled α'-Type Ti-12 mass%V-2 mass%Al Alloys Studied by Transmission Electron Microscopy
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- Sato Kazuhisa
- Institute for Materials Research, Tohoku University
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- Matsumoto Hiroaki
- Institute for Materials Research, Tohoku University
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- Chiba Akihiko
- Institute for Materials Research, Tohoku University
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- Konno Toyohiko J.
- Institute for Materials Research, Tohoku University
書誌事項
- タイトル別名
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- Aging Effect on Microstructure of Cold Groove-Rolled α′-Type Ti–12 mass%V–2 mass%Al Alloys Studied by Transmission Electron Microscopy
- Aging Effect on Microstructure of Cold Groove-Rolled α′-Type Ti–12 mass%V–2 mass%Al Alloys Studied by Transmission Electron Microscopy
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Microstructure and phase decomposition of hexagonal α′ martensite in cold groove rolled (CGR) Ti–12 mass%V–2 mass%Al alloys have been studied by transmission electron microscopy and electron diffraction. Acicular structure of the α′ martensite changes into equiaxed α′ grains by CGR with a cold reduction of 75%. After aging at 573 K for 500 h, local Moiré fringes disappear and diffraction rings become sharp due to recovery. However, Vickers hardness also increased in spite of the recovery. Partitioning of solute atoms and/or formation of fine precipitates can be possible cause for the observed age-hardening. Although a CGR alloy is characterized by a microstructure with polycrystalline equiaxed grains, following orientation relationship is locally observed between β precipitates and α grains after aging at 673 K: (101)β // (01−1−1)α , [010]β // [10−11]α . Electron tomography revealed a heterogeneous nucleation and growth of β precipitates in the deformed α′ matrix.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 55 (5), 763-767, 2014
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679228960768
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- NII論文ID
- 40020051261
- 130004455287
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- HANDLE
- 11094/89448
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- NDL書誌ID
- 025428167
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- IRDB
- NDL
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