| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
Enhancing both the mechanical property and damping capacity is of great importance for a wider usage of magnesium alloys. However, the current research of high damping magnesium alloys is carried out on the basis of dislocation/matrix interactions, which is not capable of solving the above mentioned problem. In the present research, a novel concept of “high damping magnesium alloy of twin type”is proposed for the first time. This is based on the fact that boundaries oftensile twin in magnesium alloys are movable and they can shrink and grow even at extremely low stress. Magnesium alloys with high damping capacity are achieved via introducing high density of tensile twin boundaries through pre-deformation and optimizing the twin boundary mobility by a subsequent heat treatment yet withoutsacrificing the mechanical properties.
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