| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
Bulk nanocrystalline Fe-Ni, Fe-Ni-C and Fe-Mn alloys were fabricated by an electrodeposition. Fe-Ni alloys exhibit high strength of 1.5GPa and large tensile ductility of 15%. The intrinsic ductility of these alloys was explored, taking into consideration the relationship between ductility and the orientation index or contents of grain boundary embrittlement element. An applying multiple regression analysis provides accurate predictions for the ductility. The analysis of this study points to the potency that the intrinsic ductility of nanocrystalline Fe–Ni alloys is higher than that of the present highest value of 24%.
Fe-Ni-C alloys with high hardness are also fabricated. The addition of propionic acid to the deposition bath could release the excess grain boundary defects of electrodeposited alloys in as-deposited states. Fe-Mn alloys without voids and cracks were also fabricated.
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