论文信息 - Effect of casting mode and thermal treatments on the electrical conductivity of the AA4006 aluminum alloy

Effect of casting mode and thermal treatments on the electrical conductivity of the AA4006 aluminum alloy

Initially studied was the effect of the casting mode on the electrical conductivity of AA4006 aluminum alloy sheets produced by both Twin Roll Casting (TRC) and by the semi-continuous Direct Chill (DC) industrial processes, when compared to sheets with commercial purity (AA1050) and high purity aluminum (AA1199). Then, the effects of heat treatments on the electrical conductivity of the AA4006 alloy sheets produced by TRC were also studied. Isochronous and isothermal heat treatments allowed to obtain the precipitation and solution kinetics of the intermetallic compounds. The precipitation kinetics was analyzed with the help of the Johnson-Mehl-AvramiKolmogorov equation.

A. F. Padilha | R. L. Plaut | D. S. Yoshikawa | L. G. D. Carvalho

[1] N. B. Lima,et al. Um estudo comparativo entre chapas produzidas pelos processos de lingotamento contínuo e de lingotamento semicontínuo da liga AA4006: microestrutura e textura cristalográfica , 2012 .

[2] Janaina da Costa Pereira Torres de Oliveira,et al. Caracterização microestrutural dos alumínios comerciais AA1100, AA1050 e AA1070 e do alumínio superpuro AA1199 , 2009 .

[3] J. Røyset,et al. Kinetics and mechanisms of precipitation in an Al–0.2 wt.% Sc alloy , 2005 .

[4] W. Lee,et al. The effect of homogenization on the recrystallization behaviour of AA4006 Al–Si alloy , 1998 .

[5] M. Starink. Kinetic equations for diffusion-controlled precipitation reactions , 1997 .