| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Research Abstract |
The mechanism of the pseudo-elasticity is studied according to the revealed mechanism of shape memory alloy and then the alloy having the behavior is considered. First, this study presents a simple interatomic bonding model for disordered A2 and B2 crystal structures. Only 13 motifs were found as unique by point symmetrical operations and classified in terms of the point groups. Four bonding patterns were found for configuring the space of models with unique motifs according to symmetrical operations between the motifs of the center and neighbor atoms. Each shape memory binary alloy can then be connected to the motifs on the atomic model via the crystal syngony and point symmetry. Second, the amount of the strain energy of Ni-Ti alloy during deformation is compared with that of heat flow with DSC during heating and the equality at the balances of both is found. Third, Three kinds of Fe-based alloys are conducted on elastic and plastic deformation tests and considered the pseudo-l asticity.
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