Furukawa-Sky Review No.7 (April 2011)

  • Google+で一般公開
  • ツイートする
  • facebookでシェアする
音声で読み上げる

技術論文

Abnormal Grain Growth and Recrystallization in Al-Mg Alloy AA5182 Following Hot Deformation

Full Text PDF(PDFファイルを開きます1,863KB)

  • ung-Kuei Chang
  • Ken Takata
  • Koji Ichitani
  • Eric M. Taleff

Abnormally large grains have been observed in Al-Mg alloy AA5182 sheet material after forming at elevated temperature, and the reduced yield strength that results in a practical problem for commercial hot-forming operations. The process by which abnormal grains are produced is investigated through controlled hot tensile testing to reproduce the microstructures of interest. Abnormal grains are shown to develop strictly during static annealing or cooling following hot deformation; the formation of abnormal grains is suppressed during plastic straining. Abnormal grains grow by static abnormal grain growth (SAGG), which becomes a discontinuous recrystallization process when abnormal grains meet to form a fully recrystallized microstructure. Nuclei which grow under SAGG are produced during hot deformation by the geometric dynamic recrystallization (GDRX) process. The mechanism through which a normally continuous recrystallization process, GDRX, may be interrupted by a discontinuous process, SAGG, is discussed.

技術論文 / Technology Articles

  1. Abnormal Grain Growth and Recrystallization in Al-Mg Alloy AA5182 Following Hot Deformation
  2. Influence of Crystal Orientations on the Bendability of an Al-Mg-Si Alloy

Get Adobe Reader

PDFをお読みいただくにはAdobe Readerが必要です。
お持ちでない方はこちらからダウンロードし、ご利用ください。