scholarly journals INVESTIGATION OF THE INFLUENCE OF THE MODIFIERS P, SR, TI AND COMBINATIONS OF THEM ON THE STRUCTURE AND MECHANICAL PROPERTIES OF ALSI25 ALLOY

2021 ◽  
Vol 3 ◽  
pp. 256-260
Author(s):  
Ivan Panov ◽  
Boyan Dochev ◽  
Desislava Dimova
Keyword(s):  
Mechanical Properties ◽  
Primary Silicon ◽  
Mechanical Tests ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Size And Shape ◽  
Silicon Crystals ◽  
Positive Effect ◽  
Aluminum Silicon

The most commonly used elements to modify primary silicon crystals in the structure of hypereutectic aluminum-silicon alloys are phosphorus and sulfur. Phosphorus has been shown to have the highest coefficient of modification with respect to the primary silicon and is therefore a preferred modifier. There are also data on the positive effect of the modifiers Sb, Sr, Ti, and B on the silicon crystals in the structure of this type of alloys. The influence of the modifiers phosphorus, strontium, titanium and combinations of them on the size and shape of both the primary silicon crystals and the silicon crystals in the composition of the eutectic of the AlSi25 alloy has been studied in this work. Mechanical tests have been performed to determine both the strength and the plastic parameters of the investigated alloy (in unmodified and modified state). The classic for this type of alloys modifier - phosphorus - has been introduced into the melt by the ligature CuP10. Strontium has been introduced by the ligature AlSr10, and titanium - by the ligature AlTi5B1, the two ligatures in the form of rods. The investigated alloy has also been modified by combinations of the used modifiers: phosphorus and strontium, phosphorus and titanium.The influence of the used modifiers on the structure and mechanical properties of AlSi25 alloy has been discussed.

scholarly journals INVESTIGATION OF THE INFLUENCE OF DIFFERENT MODIFIERS ON THE EUTECTIC SI IN THE COMPOSITION OF ALSI18 ALLOY

2021 ◽  
Vol 3 ◽  
pp. 261-265
Author(s):  
Ivan Panov ◽  
Boyan Dochev ◽  
Valentin Manolov ◽  
Angel Velikov ◽  
Vanya Dyakova
Keyword(s):  
Eutectic Silicon ◽  
Microstructural Analysis ◽  
Primary Silicon ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Size And Shape ◽  
Silicon Crystals ◽  
Different Types ◽  
Eutectic Si ◽  
Shape And Size

The structure of hypereutectic aluminum-silicon alloys consists of primary silicon crystals arranged in a eutectic matrix. In the present work the influence of different types of modifiers on the size and shape of the silicon crystals in the composition of the eutectic of the AlSi18 alloy has been studied. The classic for this type of alloys modifier (phosphorus), as well as the nanomodifiers SiC and nanodiamonds (ND) have been used. The results of the microstructural analysis show that the three modifiers used affect differently the shape and size of the eutectic silicon of the investigated alloy.

scholarly journals The Influence of Remelting on the Properties of AlSi6Cu4 Alloy Modified by Antimony

2012 ◽  
Vol 12 (1) ◽  
pp. 81-86 ◽  
Author(s):  
D. Medlen ◽  
D. Bolibruchova
Keyword(s):  
Mechanical Properties ◽  
Automotive Industry ◽  
Molten Aluminum ◽  
Phase Particle ◽  
Gas Content ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Low Weight ◽  
Cast Products ◽  
Aluminum Silicon

The Influence of Remelting on the Properties of AlSi6Cu4 Alloy Modified by Antimony The paper deals with the problem of multiple remelting influence on AlSi6Cu4 alloy modified by antimony on chosen mechanical characteristics, microstructure and gas content. This foundry alloy is used mostly in automotive industry. Foundry Aluminum-Silicon alloys are also used in number of industrial weight sensitive applications because of their low weight and very good castability and good mechanical properties. Modifiers are usually added to molten aluminum-silicon alloys to refine the eutectic phase particle shape and improve the mechanical properties of the final cast products and Al-Si alloys cast properties.

scholarly journals Pengaruh Perlakuan Panas Terhadap Sifat Mekanis dan Struktur Mikro Paduan Alumunium Silikon

2020 ◽  
Vol 17 (2) ◽  
pp. 206
Author(s):  
Ahmad Zubair Sultan ◽  
Abram Tangkemanda ◽  
Irsyad Amru Djafar ◽  
Rio Triwanto Rantepadang
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Heat Treatment ◽  
Aging Temperature ◽  
Age Hardening ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Alloy Material ◽  
Optimal Value ◽  
Aluminum Silicon

: The use of aluminum silicon alloys as automotive components is growing along with the growing desire to reduce the weight of the components used. However, aluminum alloys still have low mechanical properties, so other processes are needed to increase their hardness, one of them by heat treatment process. This alloy material is commonly used for motorcycle piston. This study aims to determine the effect of heat treatment on mechanical properties and microstructure of Aluminum Silicon A383 using the age hardening method with variations in aging temperature and different holding times. The testing of mechanical properties is done by testing the hardness and thermal conductivity. From the testing results, composition of aluminum alloy A383 composed of 73.30% aluminum, 22.08% silicon and highest hardness 105.9HB at an aging temperature 2000C within 30 minutes and the optimal value of the hardness and thermal conductivity of the aging variations performed are at temperature 2000C at holding time 88 minute. As the aging temperature increases, the hardness of aluminum increases and amount of silicon also increase. 

REYNOLDS 390 and A390

Alloy Digest ◽  
1971 ◽  
Vol 20 (8) ◽  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
High Hardness ◽  
Heat Treating ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Temperature Performance

Abstract REYNOLDS 390 and A390 are hypereutectic aluminum-silicon alloys having excellent wear resistance coupled with good mechanical properties, high hardness, and low coefficients of expansion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, and machining. Filing Code: Al-203. Producer or source: Reynolds Metals Company.

The Effects of Microstructure on Properties

2004 ◽  
pp. 39-46
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Detailed Examination ◽  
Intermetallic Phases ◽  
Primary Phase ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Aluminum Castings ◽  
Eutectic Modification ◽  
Grain Size And Shape

Abstract In castings, microstructural features are products of metal chemistry and solidification conditions. The microstructural features, excluding defects, that most strongly affect the mechanical properties or aluminum castings are size, form, and distribution of intermetallic phases; dendrite arm spacing; grain size and shape; and eutectic modification and primary phase refinement. This chapter discusses the effects of these microstructural features on properties and methods for controlling them. The chapter concludes with a detailed examination of the refinement of hypereutectic aluminum-silicon alloys.

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