2010 Fiscal Year Final Research Report
Fabrication of bulk metallic glasses with improved mechanical properties in corrosive aqueous solutions and in cryogenic temperatures
| Project/Area Number |
20560644
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Tohoku University |
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Principal Investigator |
KAWASHIMA Asahi 東北大学, 金属材料研究所, 特別教育研究教員 (50005964)
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| Co-Investigator(Kenkyū-buntansha) |
KURISHITA Hiroaki 東北大学, 金属材料研究所, 准教授 (50112298)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 金属ガラス / 機械的性質 / 応力腐食割れ / 低温 / 塑性ひずみ |
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| Research Abstract |
In general, metallic materials suffer brittle fracture when they are under the combined reactions of tensile stress and specific environments. This phenomenon is called stress corrosion cracking (SCC)and very important from the standpoint of safe designing. Accordingly, we investigated SCC properties of bulk metallic glasses (BMGs)in NaCl solutions. It was found for the first time that Zr_<70> Cu_6Al_8Ni_<16> BMG showed no susceptibility to SCC. The mechanical properties for CuZr-and Ni-based BMGs were also examined at cryogenic temperature (77K). We obtained the new results in which the BMGs possess both high strength and improved plastic train at cryogenic temperatures.
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