Influence of Oxide Additions on the Porosity Development and Mechanical Properties of A356 Aluminium Alloy Castings

2012 ◽  
Vol 6 (2) ◽  
pp. 41-50 ◽  
Author(s):  
T. Ludwig ◽  
M. Di Sabatino ◽  
L. Arnberg ◽  
D. Dispinar
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloy ◽  
Alloy Castings ◽  
A356 Aluminium Alloy ◽  
Porosity Development

The Effect of Scandium on the Mechanical Properties of A356 Aluminium Alloy

2016 ◽  
Vol 707 ◽  
pp. 144-147
Author(s):  
Ying Pio Lim ◽  
Wei Hong Yeo ◽  
A. Masita
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminium Alloy ◽  
Die Casting ◽  
A356 Alloy ◽  
Charpy Impact ◽  
Casting Process ◽  
Die Casting Process ◽  
Charpy Impact Strength ◽  
A356 Aluminium Alloy

In this project, the addition of scandium (Sc) into A356 aluminium alloy was studied for its effect on the mechanical properties after gravity die casting process. Scandium addition was administered at the weight percentages of 0.1, 0.2 and 0.3. The results obtained in this work revealed that scandium can significantly enhance the mechanical properties of A356 alloy in terms of tensile strength, hardness and charpy impact strength. In general, the addition of 0.2 wt% Sc in A356 alloy was found to be able to achieve the maximum tensile strength of 172.94MPa as compared to 136.03MPa for sample without Sc. No significant improvement in tensile strength was found when more than 0.3wt% added to the alloy. As for hardness, the sample with 0.3 wt% Sc attained the maximum Vicker’s hardness of 86.60 HV as compared to 76.48 HV for unmodified A356. Similarly, the addition of 0.3wt% Sc in A356 can achieve highest impact energy of 2.71J as compare to 1.09J for unmodified A356.

Laser Welding of SSM Cast A356 Aluminium Alloy Processed with CSIR-Rheo Technology

2006 ◽  
Vol 116-117 ◽  
pp. 173-176 ◽  
Author(s):  
R. Akhter ◽  
L. Ivanchev ◽  
C. Van Rooyen ◽  
P. Kazadi ◽  
H.P. Burger
Keyword(s):  
Mechanical Properties ◽  
Laser Welding ◽  
Weld Metal ◽  
Aluminium Alloy ◽  
Nd:Yag Laser ◽  
Dendrite Structure ◽  
Weld Microstructure ◽  
Semi Solid ◽  
A356 Aluminium Alloy ◽  
Fine Dendrite

Samples of aluminium alloy A356 were manufactured by Semi Solid Metals HPDC technology, developed recently in CSIR-Pretoria. They were butt welded in as cast conditions using an Nd:YAG laser. The base metal and weld microstructure were presented. The effect of different heat treatments on microstructure and mechanical properties of the welds were investigated. It was found that the fine dendrite structure of the weld metal contributed for equalizing the mechanical properties of the joint.

Effects of Vibration and Salts Treatments on Aluminium Alloy Properties Used in Mould Manufacture

2015 ◽  
Vol 1128 ◽  
pp. 58-63
Author(s):  
Laurenţiu Ardeleanu ◽  
Constantin Bratu ◽  
Ioan Mărginean
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Aluminium Alloy ◽  
Deleterious Effect ◽  
Dissolved Gases ◽  
Casting Quality ◽  
Final Microstructure ◽  
Alloy Castings ◽  
Mould Manufacture ◽  
Alloy Properties

Metallic mould properties are influenced by the technological process used on casting. The mechanical properties of aluminium castings can be affected by dissolved gases, heterogeneous impurities or shrinkage remaining in casting after solidification. Dissolved gases and oxide inclusions in aluminium all have a deleterious effect on casting quality. The treatment of molten aluminium using vibrations and salts was found to be highly efficient in refining the microstructure of the alloy. The main objective of the paper is to understand the effects of vibrations and salts treatment on the final microstructure and changes that take place and influences aluminium alloy properties used in mould manufacture. The microstructural changes have a great significance in improving the properties of aluminium alloy castings. Understanding this effects and the modification mechanism can undoubtedly be of great significance for improving casting quality. Fluxes based on a KCl-NaCl mixture may be used to cover and protect the metal from oxidation. Most fluxes are based on a mixture of KCl and NaCl, which forms at low-temperature (665 °C) eutectic.

Effect of Minor Sb Additions on SDAS, Age Hardening and Mechanical Properties of A356 Aluminium Alloy Casting

2006 ◽  
pp. 537-542
Author(s):  
Supparerk Boontein ◽  
Wattanachai Prukkanon ◽  
Kongkiat Puparatanapong ◽  
Julathep Kajornchaiyakul ◽  
Chaowalit Limmaneevichitr
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloy ◽  
Age Hardening ◽  
Alloy Casting ◽  
A356 Aluminium Alloy
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