| Project/Area Number |
04650600
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Physical properties of metals
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| Research Institution | THE UNIVERSITY OF TOKUSHIMA |
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Principal Investigator |
INOKO Fukuji THE UNIVERSITY OF TOKUSHIMA, FACULTY OF ENGINEERING PROFESSOR, 工学部, 教授 (50029104)
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1993: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1992: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | grain boundary premelting / thin foil / fcc metals / screw dislocation pile-up / edge dislocation pile-up / 粒界の予融解 / 再結晶 / 粒界 |
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| Research Abstract |
The grain boundary premelting temperatures(GBPMT) T_m in thin foils of copper and silver bicrystals deformed in tension to a strain of 0.4 were approximately 0.5T_M. T_M is the bulk melting point. The GBPMT T_M in thin foils of the bicrystal whose grain boundary plane was parallel to active screw dislocations was lower than that to active edge dislocations. The difference between the GBPMT T_M(Al) [*T_M(Al)] of aluminum, bicrystals, and the T_M(Cu and Ag) [*0.5T_M(Cu and Ag)] of copper and silver bicrystals, respectively, depends upon the difference between the properties of the corresponding oxide films and would probably be related to the difference in the elastic anisotropy between them. In zinc polycrystals the sublimation occurs at the grain boundaries and in grains at approximately 0.5T_M.
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