Influence of Indium Trace Addition on the Precipitation Behavior in a 357 Cast Aluminum Alloy

Abstract

Effect of indium addition on aging precipitation behavior of 357 cast alloy has been investigated by hardness measurement, differential scanning calorimetry (DSC) and TEM analysis. Age hardening results show that 0.1 wt.% indium addition to 357 cast alloy increases the peak hardness by 20 HV during aging at 160°C. DSC and TEM analysis results show that indium addition constrains precipitation of GP zones, and enhances precipitation of b 00 phases. The possible indium atoms participating in the precipitation during aging and the large indium-vacancy binding energy can explain the effect of indium on aging behavior of 357 cast alloy.

Influence of solidification rate and alloying elements on structure, mechanical and electrical properties of Al-Cu-X alloys

“…When the studies conducted in the last decade are examined, while some studies are available regarding the effect of mechanical properties of Al-Cu alloys produced by AE such as Co, Sn, Zn, Zr, Ti, Mg, Mn, Sc, etc. [8][9][10][11][12][13] where the amount of AE is generally higher than 0.5 wt.% (macro additions), the same reach is a trend to obtain aluminum alloys with a better combination of properties by micro-alloying the existing commercial alloys, i.e., by addition of trace amounts (< 0.1 wt.%) of elements like Ag, Sn, Zr, Cd, In, Ti, Sc, etc. Trace addition of these alloying elements influences the microstructure and mechanical properties of the base alloy [14][15][16][17].…”

“…The mechanical properties of unidirectionally solidified Al-Cu based alloys, which are essential commercial materials, have been reported in different researches [4,[8][9][10][11][12][13][14][15][16][17][18][19][20]. The solidification parameters (e.g., temperature gradient and solidification rate) and the addition of the AE directly affect the microstructural formation of the alloys.…”

Effect of Indium on Precipitation Kinetics of an Al8Si0.4Mg Cast Alloy

“…In addition, alloying elements have important influence on age hardening behavior of aluminum alloys [3]. Early study shows that Indium addition to Al8Si0.4Mg alloy increases the age hardening response [4]. In this research, the effect of Indium on the age precipitation kinetic of Al8Si0.4Mg cast alloy has been studied by DSC analysis.…”