2014 Fiscal Year Final Research Report
Analysis of Deformation and Fracture Mechanisms in Multiphase Alloys Using Microscale Mechanical Testing Technique
| Project/Area Number |
24360293
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Kumamoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
MATSUDA Mitsuhiro 熊本大学, 大学院自然科学研究科, 准教授 (80332865)
MINE Yoji 熊本大学, 大学院自然科学研究科, 准教授 (90372755)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 構造・機能材料 / 機械的性質 / 材料組織 / 材料試験 / 破壊 |
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| Outline of Final Research Achievements |
The mechanical properties of multiphase alloys are dominated by their microstructure. Therefore, to develop materials with superior mechanical properties, it is important to examine the mechanical properties of each microstructural constituent. However, the measurement of mechanical properties of each constituent is difficult because the size is on the order of microns. We have developed a testing machine that enables the measurement of mechanical properties and in-situ observation of deformation behavior of microsized materials. This testing machine is equipped with a white-light interferometer that can measure the surface profile of a microsized specimen with high precision. We have measured the mechanical properties of microsized specimens prepared from DP (Dual Phase) steels and Mg-Zn-Y alloys. As results, the deformation behavior and strain localization around precipitates were measured, and the occurrence of cracking at the interface boundary of two phases was clearly observed.
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| Free Research Field |
材料評価学
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