Effects of Tungsten Addition and Isothermal Annealing on Microstructural Evolution and Hardening Behavior of Two-Phase Ni₃Al-Ni₃V Intermetallic Alloys
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- Uekami Akinori
- Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University
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- Semboshi Satoshi
- Institute for Materials Research, Tohoku University
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- Kaneno Yasuyuki
- Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University
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- Takasugi Takayuki
- Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University
書誌事項
- タイトル別名
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- Effects of Tungsten Addition and Isothermal Annealing on Microstructural Evolution and Hardening Behavior of Two-Phase Ni<sub>3</sub>Al-Ni<sub>3</sub>V Intermetallic Alloys
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<p>The effects of tungsten (W) addition and isothermal annealing on the microstructure and related hardening behavior were investigated for the dual two-phase Ni3Al-Ni3V intermetallic alloys. The microstructures in the homogenized alloys depended on the W substitution manner for Ni, Al or V. Distinctively fine and coherent dual two-phase microstructures were developed for the homogenized alloy in which W was substituted for Al and resulted in the largest hardness in the investigated alloys. Disk-shaped and fine Ni4W particles were precipitated in the channel region of the isothermally annealed alloy in which W was substituted for Ni. Hardness of the alloys increased with increasing annealing time and made a peak, followed by decrease, irrespective of the W substitution manner. The initial increase of hardness at early annealing time was attributed to the maturity of the eutectoid microstructure prematurely developed in the channel region before annealing. The simultaneous addition with W and Nb stabilized the eutectoid microstructure in the channel region and suppressed softening at a prolonged annealing time. Hardening mechanisms for the homogenized and annealed alloys were discussed in terms of the microstructural and phase stability and compared with the alloys with the simultaneous addition with W and Nb.</p>
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 59 (2), 204-213, 2018
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
- 1390001204253031808
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- NII論文ID
- 130006320119
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 028793054
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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
- NDL
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