| Budget Amount *help |
¥2,496,000 (Direct Cost: ¥1,920,000、Indirect Cost: ¥576,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2010: ¥1,196,000 (Direct Cost: ¥920,000、Indirect Cost: ¥276,000)
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| Research Abstract |
The purpose of this study is to propose a new surface coating method and investigate its formation mechanism, and to investigate the effect of surface hardened layer on the very high cycle fatigue properties of metallic materials. As results of fatigue tests, the fatigue strength of surface hardened material changed depending on the surface layer. This was because the fatigue fracture mode changed depending on the mechanical property and thickness of the surface layer. The fatigue fracture mechanism was clarified from view points of the local bending stress distribution applied to the surface hardened material.
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