Low Temperature Deformation of Sintered Mo Alloys
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- Tanoue Koji
- Department of Metallurgy, Kyushu Institute of Technology
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- Aono Yasuhisa
- Graduate School, Kyushu Institute of Technology
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- Senba Kenji
- Nippon Tungsten Co., Ltd.
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- Okazaki Kenji
- Department of Metallurgy, Kyushu Institute of Technology
Bibliographic Information
- Other Title
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- 焼結モリブデン合金の低温変形
- ショウケツ モリブデン ゴウキン ノ テイオン ヘンケイ
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Description
Low temperature deformation of powder metallurgical pure Mo and dilute Mo-Cr, Mo-W alloys are studied over the temperature range from 77 to 500°K by simple tension, stress relaxation and incremental unloading tests. The experimental results show that substitutional solute atoms do not affect the activation volume V* and the thermal component of the flow stress σ*, but affect flow stress σ through the athermal component σμ. From the relation Hk=4τ*V*, the kink energy Hk is calculated to be 0.58 eV both for pure Mo and Mo alloys. The activation energy H is deduced to be 1.40 eV at 500°K, which is in good agreement with 1.48 eV obtained from Seeger’s equation proposed for the Peierls-Nabarro process at low stress. It is concluded from the present results that low temperature deformation (T<500°K) is controlled by the overcoming of Peierls-Nabaroo hills by the nucleation of double kinks and that substitutional solute atoms increase only the athermal component of the flow stress.
Journal
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- Journal of the Japan Institute of Metals and Materials
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Journal of the Japan Institute of Metals and Materials 38 (12), 1178-1185, 1974
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390001206485405056
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- NII Article ID
- 130007338957
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- NII Book ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL BIB ID
- 1579644
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed