| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2011: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
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| Research Abstract |
In order to improve r-values and acheve good deep drawability in an age-hardenable Al-Mg-Si alloy for automotive body panels, symmetric cold-rolling and asymmetric warm-rolling were conducted under appropreate conditions, and then the mechanism of recrystallization texture evolution was investigated with the purpose of developing the {111} texture favorable for r-value improvement during solution treatment.
The {111} recrystallization texture was formed during the solution treatment under high-temperature and short-time of the rolled sheets, which were processed by asymmetric warm-rolling at a low reduction in thickness after cold-rolling. Microstructural observations and orientation analyses suggested that the {111}-oriented subgrains, which had low dislocation density and was hardly subjected to pinning by fine precipitates, became recrystallized nuclei preferentially and encroached on areas with other orientations, resulting in the {111} texture evolution.
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