Recrystallization and Aging Behavior of Texture-Controlled Age-Hardenable Aluminum Alloy Sheets

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420742
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Material processing/Microstructural control engineering
• Research Institution: Osaka Prefecture University
• Principal Investigator: Inoue Hirofumi 大阪府立大学, 工学(系)研究科(研究院), 教授 (30137236)
• Research Collaborator: AMANE Ryou ; KAGEYAMA Naosuke ; MORI Yuto
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 温間異周速圧延 / 再結晶集合組織 / 転位密度 / 方位関係 / 微細析出物 / 昇温速度 / 時効硬化 / 予備時効

Outline of Final Research Achievements

Recently, the use of age-hardenable Al-Mg-Si alloy sheets is forwarded actively in order to achieve weight reduction of automobiles. Their applications are limited to relatively flat panels. Deep drawability is very important for car components with complex shape such as inner panels of the door.
The first aim of this study is to develop a {111} recrystallization texture favorable for improvement in deep drawability during solution treatment after an appropriate combination of cold rolling and subsequent asymmetric warm rolling. In order to achieve it, the mechanism of the recrystallization texture evolution and the optimum heat treatment were investigated. As a result, better deep drawabilty was obtained by using this combined processing in comparison with conventional materials processed by only cold rolling. In addition, aging behavior after solution treatment was examined. The results suggested that there was a possibility of strengthening by bake finish.

Free Research Field

材料組織制御