| Co-Investigator(Kenkyū-buntansha) |
足立 大樹 兵庫県立大学, 工学(系)研究科(研究院), 准教授 (00335192)
藤田 和孝 宇部工業高等専門学校, その他部局等, 教授 (10156862)
網谷 健児 東北大学, 金属材料研究所, 准教授 (30463798)
三浦 永理 兵庫県立大学, 工学(系)研究科(研究院), 准教授 (70315258)
早乙女 康典 東北大学, 金属材料研究所, 教授 (90143198)
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| Budget Amount *help |
¥42,640,000 (Direct Cost: ¥32,800,000、Indirect Cost: ¥9,840,000)
Fiscal Year 2016: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2015: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2014: ¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
Fiscal Year 2013: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
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| Outline of Final Research Achievements |
Nanocrystalline and amorhpous bulk metallic alloys have been limited in practical applications because of their low ductility under tensile and compressive testing conditions. This may be due to the formation of highly localized shear bands during plastic deformation. We have developed the high strength Ni-W electrodeposited alloys having large plastic deformability during tensile tests, e.g., tensile strength of about 2000 - 3000 MPa with plastic strain abour 1% - 7%. This may be due to the dynamic nanocrystalline grain growth during plastic deformation. In addition, small amounts of Au addition on the Zr-Cu-Ni-Al BMGs have accelerated dynamic precipitations of nano-scale icosahedral quasicrystal phase (I-phase) inside the shear bands during plastic deformation. As the results, crystallization behaviors of the I-phase during plastic deformation have large remedial effects on the mechanical properties of the Zr based BMGs
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