Experimental study of micro-cracking in Mg alloys based on the deformation response under dynamic loading
| Project/Area Number |
21360347
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Kobe University (2010-2011)
National Institute for Materials Science (2009) |
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Principal Investigator |
MUKAI Toshiji 神戸大学, 大学院・工学研究科, 教授 (40254429)
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| Co-Investigator(Kenkyū-buntansha) |
SOMEKAWA Hidetoshi 独立行政法人物質・材料研究機構, 元素戦略材料センター, 主任研究員 (50391222)
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| Co-Investigator(Renkei-kenkyūsha) |
KOIKE Jyunichi 東北大学, 大学院・工学研究科, 教授 (10261588)
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| Research Collaborator |
SINGH Alok 独立行政法人物質・材料研究機構, 元素戦略材料センター, 主席研究員 (60354213)
WATANABE Hiroyuki 地方独立行政法人大阪市立工業研究所, 加工技術研究部, 研究主任 (90416339)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2011: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2010: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2009: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
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| Keywords | マグネシウム合金 / 高速変形 / せん断変形 / 変形双晶 / 溶質原子 / ひずみ速度依存性 / 非底面すべり変形 / せん断帯 / マイクロクラック |
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| Research Abstract |
A double-shear specimen was designed by FEM simulation based on experimental data of uniaxial tension and compression under dynamic loading. The double-shear specimen was machined from pure magnesium and Mg-Y alloy extrusions having four kinds of shear plane against the extruded direction. As a result, shear stress and shear displacement at crack initiation strongly depended on the sampling direction. The enhanced ductility and toughness was attributed to weakened anisotropy by adding the yttrium solute. It was found that the frequency of micro-crack initiation depended on the basal plane distribution. The trend in the toughness enhancement was similar to the fact that weakened basal texture led to toughness enhancement in high strength Mg alloys having fine-grained structure.
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Report
(4 results)
Research Products
(64 results)
