Resolution of the influence for the insoluble impurity atoms on solute drag creep and hot ductility
| Project/Area Number |
15K06494
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Kagawa National College of Technology |
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Principal Investigator |
ITO TSUTOMU 香川高等専門学校, 機械工学科, 准教授 (00409038)
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| Co-Investigator(Kenkyū-buntansha) |
本間 智之 長岡技術科学大学, 工学研究科, 准教授 (50452082)
水口 隆 愛媛大学, 理工学研究科(工学系), 准教授 (00462515)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 溶質雰囲気引きずり運動 / 熱間延性 / 第2相粒子 / 不純物原子 / 高温変形機構 / 高温変形 / Al-Mg固溶体 / 金属固溶体 / 空洞欠陥 |
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| Outline of Final Research Achievements |
Effects of second-phase particle on hot ductility of Al－Mg alloys, irrespective of the addition of impurity atoms, were investigated, and the following results obtained.
[1] The average grain size of each alloy before high-temperature tensile tests was about 20 to 30 μm. [2] The average grain size of the second-phase particles existing in each alloy is about 1 mm, and the area fraction is less than 3%. Large elongations of over 200% were obtained in the wide test conditions of each alloy. [2] From the viewpoint of stress exponent and activation energy for deformation, the dominant deformation mechanism for the large elongation obtained is considered to be solute drag creep, which is rate-controlled by the interdiffusion of Mg in Al. [3] The superplastic-like elongation of over 200% is obtained because the area fraction of the second-phase particles is slightly less than 3%.
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Report
(4 results)
Research Products
(31 results)
