Structural Changes during Isothermal Annealing of the Quenched Ni<SUB>3</SUB>Mo Alloy (I)
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- Yamamoto Masahiko
- Department of Metallurgy, Faculty of Engineering, Osaka University
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- Nenno Soji
- Department of Metallurgy, Faculty of Engineering, Osaka University
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- Saburi Toshio
- Department of Metallurgy, Faculty of Engineering, Osaka University
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- Mizutani Yasumasa
- Graduate Student, Department of Metallurgy, Faculty of Engineering, Osaka University
抄録
Transmission electron and optical microscopic observations were made on the Ni-24.4 at% Mo alloy (nearly stoichiometric Ni3Mo) to clarify the decomposition process during isothermal annealing after quenching from the α-region (face-centered cubic structure).<BR>It is found that the alloy quenched from the α-region shows a short-range order similar to that found in the Ni4Mo alloy, and when annealed isothermally below the peritectoid temperature, γ(Ni3Mo) does not precipitate directly from the short-range-ordered matrix, but a meta-stable phase Ni2Mo (Pt2Mo type superlattice) does. These precipitates of Ni2Mo are lenticular in shape and grow to plates. The habit plane of the plate-shaped Ni2Mo precipitates is of the {110}α type. With increase in annealing time, β(Ni4Mo) precipitates in the matrix, and Ni2Mo and β coexist. On the other hand, γ nucleates predominantly at grain boundaries of α and grows. When annealed for a longer time, γ predominates by consuming the pre-existing Ni2Mo and β.<BR>The orientation relationships of each of precipitates (Ni2Mo, γ and β) with the matrix were determined.
収録刊行物
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- Transactions of the Japan Institute of Metals
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Transactions of the Japan Institute of Metals 11 (2), 120-126, 1970
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
- 1390001205117429760
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- NII論文ID
- 130003485009
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- COI
- 1:CAS:528:DyaE3cXkt1yisb8%3D
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- ISSN
- 24324701
- 00214434
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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
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可