Low-Temperature Toughness of TZM Alloy which Internally Nitrided by N2 Gas.
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- Kobayashi Makoto
- Graduate School of Science, Okayama University of Science
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- Hiraoka Yutaka
- Department of Applied Physics, Okayama University of Science
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- Nagae Masahiro
- Department of Environmental Chemistry & Materials, Okayama University
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- Takada Jun
- Department of Applied Chemistry, Okayama University
Bibliographic Information
- Other Title
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- 窒素ガスにより内部窒化させたTZM合金の低温靭性
- チッソ ガス ニ ヨリ ナイブ チッカ サセタ TZM ゴウキン ノ テイオンジンセイ
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Abstract
In order to investigate the effect of dispersion of fine nitride particles on the low-temperature toughness of molybdenum, bend tests were performed for TZM alloy which had been internally nitrided by N2 gas and demonstrated surface hardness of 250Hv and 300Hv. In this study the low-temperature fracture strength and ductility were represented by critical stress and critical temperature, respectively.<BR>The results are summarized as follows. (1) Yield strength of the nitrided specimens was generally much higher than that of the recrystallized ones. (2) Critical stress of the nitrided specimens was approximately as high as that of the recrystallized ones. (3) Fracture mode of the nitrided specimens was almost similar to that of the recrystallized ones. Transgranular fracture was predominant. (4) Ductility of the nitrided specimens was much lower than that of the recrystallized ones. These results are attributed to the distribution of nitride particles. Very fine nitride particles were observed predominantly in the matrix, but not at and near the grain boundaries.
Journal
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- Journal of the Japan Society of Powder and Powder Metallurgy
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Journal of the Japan Society of Powder and Powder Metallurgy 46 (7), 705-709, 1999
Japan Society of Powder and Powder Metallurgy
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Details 詳細情報について
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- CRID
- 1390001206309038592
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- NII Article ID
- 10005740830
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- NII Book ID
- AN00222724
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- ISSN
- 18809014
- 05328799
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- NDL BIB ID
- 4800736
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed