Dispersoid Formation and Recrystallization Behavior in an Al-Mg-Si-Mn Alloy

J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (3): 237-243.

• Regular Papers • Previous Articles Next Articles

Dispersoid Formation and Recrystallization Behavior in an Al-Mg-Si-Mn Alloy

Rong Hu, Tomo Ogura, Hiroyasu Tezuka, Tatsuo Sato, Qing Liu

1) Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
2) Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Tokyo, Japan

Received:2008-10-13 Revised:2008-11-28 Online:2010-03-28 Published:2010-03-22
Contact: Qing Liu

Abstract

Abstract:

The nucleation and precipitation of Mn-containing dispersoids in an Al-Mg-Si-Mn alloy (6082) have been studied by optical microscopy, EPMA (electron probe microanalysis) and TEM (transmission electron microscopy). The influence of Mn-containing dispersoids on the recrystallization behavior was also investigated. The size and distribution of dispersoids were strongly affected by both the homogenization process and the alloying element distribution formed in the direct chill cast procedure. The Mn-containing dispersoids were observed to nucleate preferentially on the β'-Mg₂Si phase and to be aligned along the <100> direction of the matrix. After cold deformation, the morphology of dispersoids greatly influences the recrystallization and grain growth behavior in the annealing process.

Key words: Mn-containing dispersoids, Homogenization, Recrystallization, Grain refinement

Rong Hu Tomo Ogura Hiroyasu Tezuka Tatsuo Sato Qing Liu. Dispersoid Formation and Recrystallization Behavior in an Al-Mg-Si-Mn Alloy[J]. J Mater Sci Technol, 2010, 26(3): 237-243.

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Dispersoid Formation and Recrystallization Behavior in an Al-Mg-Si-Mn Alloy

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