| Budget Amount *help |
¥98,410,000 (Direct Cost: ¥75,700,000、Indirect Cost: ¥22,710,000)
Fiscal Year 2014: ¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2013: ¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
Fiscal Year 2012: ¥20,280,000 (Direct Cost: ¥15,600,000、Indirect Cost: ¥4,680,000)
Fiscal Year 2011: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
Fiscal Year 2010: ¥34,190,000 (Direct Cost: ¥26,300,000、Indirect Cost: ¥7,890,000)
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| Outline of Final Research Achievements |
In bulk nanostructured metals, the volume fraction of grain boundary and interface (plane defects) rapidly increases. Thus, it is very important to investigate the development of lattice defects through grain boundaries, which is closely related with the anomalous mechanical characteristics of BNMs. In this study, the development of
complicated interior lattice defects in BNMs was expressed by the large-scale calculation by the atomistic model which can directly express atomic structure of grain boundary (molecular dynamics) and the continuum modeling considering the effect of grain boundaries (crystal plasticity theory), and we investigated the grain size dependence of the following phenomena: (1) dislocation emissions from grain boundaries, (2) the crack tip plasticity based on the interaction between dislocations and grain boundaries, and (3) the propagation mechanism of the plastic deformation based on the formation and dissipation of lattice defects.
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