Superplastic Behaviour and Optimum Work Processing of a Powderconsolidated and Extruded Ni-base Superalloy
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- TORISAKA Yasunori
- Mechanical Engineering Laboratory, Agency of Industrial Science and Technology
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- MIYAGAWA Matsuo
- The Technological University of Nagaoka
Bibliographic Information
- Other Title
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- 焼結Ni基超耐熱合金粉末押出し材の超塑性挙動と最適加工プロセス
- ショウケツ Niキ チョウ タイネツ ゴウキンフンマツ オシダシザイ ノ チョ
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Abstract
The powder of nickel-base suneralloy Mod. IN-100 was consolidated by hot isostatic pressing and recrystallized under the conditions of extrusion ratio of 72% at 1 373 K and subsequent annealing at 1 343 K×1h. The fine grain size of 1.5 μm in diameter was obtained.<BR>The superplastic behaviour of alloy bars mentioned above was investigated in the temperature range of 1 2231 423 K and in the range of strain rates from 2.5 × 10-4 to 10-1 s-1.<BR>The ln σ vs. ln ε curves were obtained. It was shown that the conditions obtaining the maximum strainrate sensitivity index, m changed from the constant strain rate of 10-2 s-1 at temperatures above 1 303 K to the constant flow stress of 150 MPa below 1 303 K. Therefore, it was possible to divide the ln σ vs. ln ε curves into six regions according to the deformation behaviour.<BR>Furthermore, it was desirable to decrease the temperature continuously for the purpose of keeping the maximum m during superplastic deformation in tensile test. In fact, the total elongation exceeded extremely as compared with the isothermal test.
Journal
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- Tetsu-to-Hagane
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Tetsu-to-Hagane 74 (1), 115-122, 1988
The Iron and Steel Institute of Japan
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Details 詳細情報について
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- CRID
- 1390001205151003904
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- NII Article ID
- 110001492126
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- NII Book ID
- AN00151251
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- ISSN
- 18832954
- 00211575
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- NDL BIB ID
- 3157867
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed