2013 Fiscal Year Final Research Report
Suppression of the brittle grain boundary fracture of aluminum alloys by means of soaking in a liquid metal bath
| Project/Area Number |
25630305
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Structural/Functional materials
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KOBAYASHI Hidetoshi 大阪大学, 大学院基礎工学研究科, 教授 (10205479)
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| Project Period (FY) |
2013-04-01 – 2014-03-31
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| Keywords | 液体金属 / 粒界 / 破壊 / 偏析 / 無害化 / アルミニウム合金 |
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| Research Abstract |
Al-Mg base alloys show grain boundary embrittlement at high temperatures caused by the segregation of sodium at grain boundaries. To suppress the embrittlement, it has been reported that the additional elements such as bismuth or antimony with high affinity with sodium are effective. In the present study, a novel method to add the elements was proposed by means of soaking in liquid metal baths to imporve the hot ductility of Al-Mg base alloys. As a result, it was revealed that the soaking in liquid bismuth could suppress the high temperature embrittlement. On the other hand in the soaking in liquid indium bath, it was shown that the effects were variable according to the temperature of soaking.
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