Microstructure and mechanical properties of the AA6082 aluminium alloy with small additions of Sc and Zr

被引：26
|
作者：
Vlach, Martin [1 ]
Smola, Bohumil [1 ]
Stulikova, Ivana [1 ]
Ocenasek, Vladivoj [2 ]
机构：
[1] Charles Univ Prague, Fac Math & Phys, CR-12116 Prague 2, Czech Republic
[2] Inst Met Sci & Technol, Panenske Brezany, Odolena Voda, Czech Republic
来源：
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2009年 / 100卷 / 03期
关键词：
Al-Mg-Si alloys; Electrical resistivity; Hardness; Scandium; Zirconium; MG-SI ALLOYS; PRECIPITATION; PHASE; EVOLUTION; SCANDIUM;
D O I：
10.3139/146.110022
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effect of Sc and Zr addition on microstructure and hardness development in a commercial as-cast and solution-treated (530 degrees C/45 min) AA6082 alloy was studied. The electrical resistivity decrease and hardness increase in the temperature range 180-300 degrees C are caused by precipitation of beta '' and/or beta' needles of the Mg-Si system. Precipitation and morphology changes of Al-Mn-Fe system phases in AA6082 and AA6082-ScZr alloys influence the resistivity significantly, but have a negligible effect on hardness. The initial hardness of Sc and Zr containing AA6082 alloys is higher mainly due to the presence of Al(3)(SC, Zr) particles. This difference is less pronounced in the peak-hardening state. Natural ageing of solution-treated allos influences microstructure development in both alloys when annealed subsequently up to 240 degrees C.
引用
收藏
页码：420 / 423
页数：4
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