Furukawa-Sky Review No.8 (April 2012)

  • ツイートする
  • facebookでシェアする


Evolution of Recrystallization Texture in Aluminum Alloy Sheets by Asymmetric-Warm-Rolling

Full Text PDF(PDFファイルを開きます1,784KB)

  • Yoshikazu Suzuki
  • Osamu Noguchi
  • Yoshiki Miki
  • Yoichi Ueno
  • Katsumi Koyama
  • Toshio Komatsubara

Asymmetric-warm-rolling (AWR) is a promising process to improve the Lankford value (r-value) or the deep drawability of aluminum alloy sheets by controlling the crystallographic texture of the alloy. A fundamental study has been conducted on the formation of a distinctive recrystallization texture in the Al–1 mass% Si–0.6 mass% Mg (AA6022) alloy sheets prepared by AWR at 523K. The change in texture during the recrystallization process was observed by using a SEM-EBSD system with a heating stage. The as-AWRed sheets have a considerably recovered subgrain-structure with a major orientation of {001}<110> and texture fibers of <011>//RD and near <111>//ND. Some of the recovered grains act as the nuclei for the recrystallization process and grow consuming adjacent grains. The area fraction of the <001>//ND grains decreases with grain growth during the multistep- annealing at 573-723K. The {112}, {332} and {221} grains increase or remain high in area fraction during the annealing, whereas the fraction of the ideal {111} grains decreases. For the T4 sheets made by AWR, not only the ideal {111}, but the slightly rotated components probably contribute to a high average r-value. Limited area fraction of {001} grains is another reason for the high r-value.

技術論文 / Technology Articles

  1. Effect of Experimental Humidity on Fatigue Fracture of 6XXX-series Aluminum Alloys
  2. 極低温における破壊靱性に優れたアルミニウム合金溶接部材の開発(液体水素輸送・貯蔵用アルミニウム材料の研究)
    Development of Aluminum Alloy Welding Member with Superior Fracture Toughness at Cryogenic Temperature (Study of Aluminum Material for Liquid Hydrogen Transportation and Storage Vessels)
  3. 電気化学インピーダンス法による陽極酸化皮膜の耐アルカリ性評価
    Characterization for Alkaline Dissolution of Anodic Oxide Films Formed on Aluminum by EIS
  4. Evolution of Recrystallization Texture in Aluminum Alloy Sheets by Asymmetric-Warm-Rolling
  5. Effects of Cu Addition on Aging Behavior of Al-0.3%Mg-0.5%Si Alloy

Get Adobe Reader

PDFをお読みいただくにはAdobe Readerが必要です。