Effect of AlMnSi dispersion particle size on recrystallization of 6061 aluminum alloy during homogenization

doi:10.13251/j.issn.0254-6051.2020.08.006

Abstract

Abstract: Effect of the size of AlMnSi dispersion particles on recrystallization of 6061 aluminum alloy during homogenization was studied by using mechanical property test, OM, SEM, TEM and EDS techniques. The results show that the BBC type AlMnSi dispersion particles are precipitated and grown up along the [001] crystal axis of the aluminum matrix. With the increase of homogenization temperature, the precipitation size of dispersion particles is gradually increased. When the average size and the maximum size of AlMnSi dispersion particles respectively increasing from 0.07 μm to 0.42 μm and from 0.21 μm to 1.12 μm, the mechanical properties are increased first and then decreased correspondingly. At T6 state, the 6061 aluminum alloy is still of deformed structure. When the AlMnSi dispersion particle size is increased to 1.12 μm, coarse recrystallization microstructure appears in the alloy at T6 state, resulting that the mechanical properties are decreased sharply.

Key words: 6061 aluminum alloy, AlMnSi dispersion particle, homogenization, size, recrystallization

CLC Number:

Qiu Chu, Guo Shijie, Ji Yanli. Effect of AlMnSi dispersion particle size on recrystallization of 6061 aluminum alloy during homogenization[J]. Heat Treatment of Metals, 2020, 45(8): 27-33.

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