2011 Fiscal Year Final Research Report
Microscopic fracture mechanics approach to fatigue damage mechanisms of nanocrystalline metallic thin films
| Project/Area Number |
21360055
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Meijo University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KIMACHI Hirohisa 名城大学, 理工学部, 教授 (30324453)
FUJIYAMA Kazunari 名城大学, 理工学部, 教授 (20410772)
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| Project Period (FY) |
2009 – 2011
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| Keywords | ニッケルナノ結晶 / 疲労強度 / き裂進展 / 電着法 / 結晶X線評価 |
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| Research Abstract |
Nickel thin films with the grain size ranging from sub-micrometers down to 10nm can be produced by changing the electrodeposition temperature and brightener contents. Free-standing thin films were produced by using polished stainless plate as cathode. The reduction of grain size is beneficial to fatigue crack initiation, while detrimental to fatigue crack propagation. In nanocrystals with the grain size less than 15nm, grain boundaries play a major role in fatigue micromechanisms.
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