2010 Fiscal Year Final Research Report
Development of Severe Deformation/Non-Transformation Process Utilizing Friction Stir Processing
| Project/Area Number |
20360334
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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 |
Material processing/treatments
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| Research Institution | Osaka University |
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Principal Investigator |
FUJII Hidetoshi Osaka University, 接合科学研究所, 教授 (00247230)
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| Co-Investigator(Kenkyū-buntansha) |
MORISADA Yoshiaki 大阪市立工業研究所, 加工技術課, 研究員 (00416356)
TSUMURA Takuya 大阪大学, 接合科学研究所, 助教 (00283812)
NOGI Kiyoshi 大阪大学, 接合科学研究所, 教授 (40029335)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 接合 / 溶接 |
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| Research Abstract |
Friction stir welding was performed for carbon steel with different carbon contents including hyper eutectoid steel below and above the A_1 point (eutectoid temperature 723℃). The microstructures of the above A_1 joints mainly consist of martensite for higher carbon steels. Therefore, the tensile tests results are scattered. On the other hand, the microstructures of the below A_1 joints consist of a ferrite with globular cementite. The absorbed energy for the small Charpy impact test is increased for the below A_1 joints by three times.
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