EFFECT OF Mn-ADDITION ON MICROSTRUCTURE, THERMAL AND MECHANICAL PROPERTIES OF CAST Al-Sc-Zr-BASED ALLOYS

被引：0
|
作者：
Vlach, Martin [1 ]
Stulikova, Ivana [1 ]
Smola, Bohumil [1 ]
Cerna, Jaroslava [1 ]
Cisarova, Hana [1 ]
Tanprayoon, Dhritti [2 ]
Neubert, Volkmar [2 ]
机构：
[1] Charles Univ Prague, Fac Math & Phys, Ke Karlovu 5, Prague 12116 2, Czech Republic
[2] Inst Mat & Werkstofftech, D-38678 Clausthal Zellerfeld, Germany
来源：
METAL 2011: 20TH ANNIVERSARY INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS | 2011年
关键词：
DSC; Al-Mn-Sc-Zr alloy; electrical resistivity; activation energy; isochronal annealing; TEM; ELECTRICAL-RESISTIVITY MEASUREMENTS; ANNEALED MOLD-CAST; ALUMINUM-ALLOYS; PRECIPITATION; DISPERSOIDS; SCANDIUM;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effect of Mn content on microstructure, thermal and mechanical properties of cast Al-Sc-Zr alloy during isochronal annealing was studied. Specimens of three as-cast Al-Sc-based alloys with a various content of Mn and Zr were annealed up to similar to 570 degrees C. Precipitation reaction was studied by electrical resistometry, microhardness (HV0.3) and differential scanning calorimetry measurements. The microstructure development was investigated by transmission electron microscopy and electron diffraction. The distinct microhardness increase observed after annealing above 270 degrees C corresponds excellently to the fastest resistivity changes as well as the heat flow changes. These changes are due to the precipitation of the Al3Sc particles. The apparent activation energy for precipitation of Al3Sc particles was determined. The phases of the Al-Sc-Zr system and also of the Al-Mn system were observed.
引用
收藏
页码：872 / 878
页数：7
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