| Project/Area Number |
02452095
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
機械材料工学
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| Research Institution | KYUSYU UNIVERSITY |
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Principal Investigator |
NISITANI Hironobu Kyushu Univ. Faculty of Engineering, Dept. of Strength of Material, Professor., 工学部, 教授 (20037708)
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| Co-Investigator(Kenkyū-buntansha) |
UCHIHORI Hisayuki The same as the head investigator, Research Associate., 工学部, 助手 (80037788)
ODA Yasuji The same as the head investigator, Research Associate., 工学部, 助手 (20091340)
NOGUCHI Hiroshi The same as the head investigator, Associate Professor., 工学部, 助教授 (80164680)
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| Project Period (FY) |
1990 – 1991
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| Project Status |
Completed (Fiscal Year 1991)
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| Budget Amount *help |
¥6,900,000 (Direct Cost: ¥6,900,000)
Fiscal Year 1991: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1990: ¥6,100,000 (Direct Cost: ¥6,100,000)
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| Keywords | Composites / Metal Matrix Composites / Fatigue / Rotating Bending / Succsessive Observation / SiC Whisker / Notch |
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| Research Abstract |
In this research, rotating-bending fatigue tests of the SiC whisker reinforced 6061-T6 aluminum alloy and 6061-T6 aluminum alloy made by powder metallurgy were carried out to investigate the fatigue characteristics of plain and notched specimens at room temperature. The fatigue mechanisms in both materials were clarified through successive surface observations using the plastic replica method. The results were discussed based on linear notch mechanics. In the case of the SiC whisker reinforced composites, whisker rich zone and poor zone exist and the fatigue crack nucleates from the end of the whisker near the boundary. On the other hand, in the case of the aluminum alloy, the fatigue crack nucleates from defect, and propagates by shear type. The fatigue strength of notched specimens of this material may be estimated from the concept of linear notch mechanics.
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