2013 Fiscal Year Final Research Report
Mechanism of {111} recrystallization texture evolution in aluminum alloy sheets fabricated by symmetric/asymmetric combined rolling process
| Project/Area Number |
23360328
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
INOUE Hirofumi 大阪府立大学, 工学(系)研究科(研究院), 准教授 (30137236)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | アルミニウム合金 / 冷間圧延 / 温間異周速圧延 / 溶体化処理 / 再結晶集合組織 / 微細組織 / 転位密度 / 微細析出粒子 |
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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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