Work Softening of Aluminum Base Alloys Containing Nanoscale Icosahedral Phase
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- Inoue A.
- Institute for Materials Research, Tohoku University
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- Kimura H. M.
- Institute for Materials Research, Tohoku University
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- Watanabe M.
- Faculty of Mineral and Mining, Akita University
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- Kawabata A.
- Faculty of Mineral and Mining, Akita University
Bibliographic Information
- Other Title
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- Work Softening of Aluminum Base Alloys
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Abstract
Melt-spun Al93Mn5Ce2, Al92Mn6Ce2 and Al94.5Cr3Ce1Co1.5 ribbons consist of nanoscale icosahedral (I) particles surrounded by fcc-Al phase without grain boundaries. The ribbons were cold rolled to 70% reduction in thickness (Re) and the rolling causes significant decreases in hardness and tensile strength. The particle size and interparticle spacing of the I-phase decrease by rolling, accompanying the increase in the area of the I/Al interface. However, no dislocation was observed in the cold-rolled Al and I phases. The absence of dislocations is because the interface acts as a sink of dislocations, leading to the work-softening. The softening phenomenon reflects an inverse Hall-Petch relation in which the yield strength and hardness decrease with decreasing grain size in the size region below about 30 nm because the interparticle spacing of the I-phase decreases from 15–25 nm to 5–10 nm by cold rolling to 30 to 70% reduction in thickness. This phenomenon is important for better understanding of deformation and strengthening mechanisms of the nanostructure alloys.
Journal
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- Materials Transactions, JIM
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Materials Transactions, JIM 38 (9), 756-760, 1997
The Japan Institute of Metals
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Keywords
Details 詳細情報について
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- CRID
- 1390001204247269760
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- NII Article ID
- 130003556972
- 10002453609
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- NII Book ID
- AA10699969
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- COI
- 1:CAS:528:DyaK2sXntFKls7k%3D
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- ISSN
- 2432471X
- 09161821
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- NDL BIB ID
- 4317081
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed