scholarly journals REFLECTIVITY OF ANODISED AL-SI ALLOY SURFACE OF BELT PULLEYS USED IN COMBUSTION ENGINES

2021 ◽  
Vol 112 ◽  
pp. 125-133
Author(s):  
Krzysztof LABISZ
Keyword(s):  
Aluminium Alloys ◽  
Good Choice ◽  
Main Question ◽  
Combustion Engines ◽  
Transportation Industry ◽  
Casting Method ◽  
Silicon Alloys ◽  
Alloy Casting ◽  
Hardness Increase ◽  
Inertia Control

The recent trend of using aluminium alloys instead of steel has reached the transportation industry, where increasingly, more parts are made of aluminium. An example is the belt pulley, applied for combustion engines for energy transmission. This part should be strong, durable, and lightweight. Aluminium-silicon alloys are a good choice, moreover, even when the surface is anodised, also because of their moderate inertia control and excellent wear characteristic during mechanical operations. Since aluminium is lightweight yet mechanically durable and anodised, it is an ideal belt pulley to use, especially in high-temperature operations. However, the main question is what type of Al-Si alloy, casting method and anodisation method should be used in terms of energy adsorption, having long-term properties for a lifetime, has to be applied. For this reason, this paper presents the influence of the chemical composition, casting method and anodising parameters on the structure and thickness of the anodic layer produced on aluminium alloys, as well as on the albedo value as an ability to reflect or absorb light. The aluminium alloys, AlSi12Cu1 and AlSi9Cu3, were used as research materials, obtained using different casting methods. The goal of this work was to determine the optimal combination of the anodisation conditions and materials for maximising the reflectivity factor of the surface, as a very important factor, determining the energy amount absorbed by an anodised surface. For further improvement of these surface properties as well as for enhancement of the properties and strengthen the material produced with different aluminium alloys production methods, different alloying additives were added. In addition, the mechanical properties of the surface layer were measured, where a remarkable hardness increase was obtained, and the best combination in form of AlSi12Cu1 high pressure cast was found with the highest albedo factor among all tested surface variants.

scholarly journals Influence of the Chemical Composition on Electrical Conductivity and Mechanical Properties of the Hypoeutectic Al-Si-Mg Alloys

2016 ◽  
Vol 61 (1) ◽  
pp. 353-360 ◽  
Author(s):  
B. Dybowski ◽  
J. Szymszal ◽  
Ł. Poloczek ◽  
A. Kiełbus
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Chemical Composition ◽  
Aluminium Alloys ◽  
Mg Alloys ◽  
High Electrical Conductivity ◽  
Transportation Industry ◽  
Proper Selection ◽  
Ti Addition ◽  
Selection Of

Due to low density and good mechanical properties, aluminium alloys are widely applied in transportation industry. Moreover, they are characterized by the specific physical properties, such as high electrical conductivity. This led to application of the hypoeutectic Al-Si-Mg alloys in the power generation industry. Proper selection of the alloys chemical composition is an important stage in achievement of the demanded properties. The following paper presents results of the research on the influence of alloys chemical composition on their properties. It has been revealed that Si and Ti addition decreases electrical conductivity of the Al-Si-Mg alloys, while Na addition increases it. The mechanical properties of the investigated alloys are decreased by both silicon and iron presence. Sodium addition increases ductility of the Al-Si-Mg alloys.

Alumina-dispersed 2024 aluminium alloys by a casting method

1993 ◽  
Vol 12 (4) ◽  
pp. 215-217 ◽  
Author(s):  
H. Chang ◽  
C. H. Pitt ◽  
G. B. Alexander
Keyword(s):  
Aluminium Alloys ◽  
Casting Method

scholarly journals Mechanical Characterization of Rapid Solidified Alsicumg Alloys by New CRSS Casting Method Under T6 Condition

2019 ◽  
Vol 8 (12) ◽  
pp. 2897-2902
Keyword(s):  
Mechanical Properties ◽  
Manufacturing Process ◽  
High Performance ◽  
Weight Ratio ◽  
Solidification Process ◽  
Casting Process ◽  
Casting Method ◽  
Silicon Alloys ◽  
Hardness Tester

Aluminum-silicon alloys acquiring extensive industrial attention due to their superior resistance to rate of wear and elevated strength to weight ratio properties. Though the properties of the materials substantially depend on the manufacturing process they involve. Thus many industries focusing on new manufacturing methods to produce high-performance alloys. In this present study, AlSi (16-18) alloys were prepared by new CRSS (combined rheo stir squeeze) casting method with rapid-solidification process under T-6 condition. CRSS-T6 as casting process enhances the microstructural and mechanical properties significantly by 40-70%. Whereas, the maximum value of hardness (179.37) was found with AlSi17Cu3.5Mg0.8 with CRSS-T6. The improvements in hardness and elastic properties were mainly ascribed to size, distribution, and morphology of Si-particles because of its manufacturing process. SEM, advanced metallurgical microstructure and EDS analysis techniques are used for the surface morphologies observation. Moreover, Brinell hardness tester and Tensometer are used for the characterization of mechanical properties

Metal Casting Research: Application to Aluminum Alloy Casting

2019 ◽  
Author(s):  
Murat Tiryakio ◽  
J. Campbell
Keyword(s):  
Aluminum Alloy ◽  
Reproducibility Of Results ◽  
Aluminium Alloys ◽  
Scientific Method ◽  
Metal Casting ◽  
Research Application ◽  
Aluminum Alloy Casting ◽  
Alloy Casting ◽  
Casting Alloys ◽  
Research Findings

Guidelines for designing research on cast aluminium alloys have been developed to increase the reproducibility of results and make their interpretation more objective. These guidelines, based on the scientific method and recent research findings, are proposed for research on aluminium castings, but they can be easily adapted for other casting alloys.

Analysis of Properties of Selected Aluminium Alloys, Obtained by Twin Roll Casting Method and Subjected to Cold Rolling Process

2015 ◽  
Vol 641 ◽  
pp. 202-209
Author(s):  
Wojciech Ściężor ◽  
Andrzej Mamala ◽  
Paweł Kwaśniewski
Keyword(s):  
Mechanical Properties ◽  
Continuous Casting ◽  
Cold Rolling ◽  
Aluminium Alloys ◽  
Raw Materials ◽  
Uniaxial Tensile ◽  
Casting Method ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Modern manufacturing technologies of flat cold-rolled products made of aluminium and its alloys are based on raw materials produced with the use of continuous casting technology. One of the most frequently used integrated production processes, based on continuous casting of metal, is twin roll casting method (TRC). In TRC method liquid metal flows into the area formed by two water-cooled rolls, solidifies and next is deformed (rolled) which allows to obtain strip with several millimetres thickness. Thanks to this, it is possible to eliminate hot rolling stage from the typical production technology, and directly subject obtained sheets to cold rolling process.This paper presents results of cold rolling strain dependency on the mechanical properties of tested aluminium alloys from 1XXX, 3XXX and 8XXX series, produced in the laboratory conditions with the use of TRC method. Furthermore the rolling loads and basic mechanical properties, determined in an uniaxial tensile, were examined.

A STUDY ON THERMAL DEFORMATION OF AC4C ALUMINUM ALLOY CASTING MATERIAL FOR TIRE MOLD IN METAL CASTING METHOD

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2243-2248 ◽  
Author(s):  
YOOL KWON OH ◽  
HEE SUNG YOON ◽  
HO DONG YANG
Keyword(s):  
Aluminum Alloy ◽  
Thermal Deformation ◽  
Metal Casting ◽  
Experimental Result ◽  
Temperature Profiles ◽  
Casting Method ◽  
Initial State ◽  
Element Analysis ◽  
Aluminum Alloy Casting ◽  
Alloy Casting

This study investigated on thermal deformation of AC4C aluminum alloy casting material for tire mold built in metal casting method. In this study, temperature, displacement and stress distributions of AC4C casting material occurred inside the mold were numerically calculated by finite element analysis (FEA). Also, temperature profiles of AC4C were experimentally measured to investigate the temperature characteristics during the solidification process in metal casting device. The result of this study revealed that the numerical result of temperature profiles predicted a rapid cooling from initial state to about 25 minutes, but the experimental result of it uniformly occurred from initial state to about 15 minutes by the phase change. However, the cooling patterns of two cases were almost similar results in the whole cooling process. Also, thermal deformation was generated by the difference of cooling temperature between the surface and inside of the casting from the results of displacement and stress distribution predicted by FEA.

scholarly journals Localised atmospheric corrosion of magnesium-aluminium alloys produced by semi solid casting - A 2D and 3D investigation

2020 ◽  
Author(s):  
Mehrdad Shahabi-Navid ◽  
Mats Halvarsson ◽  
Jan-Erik Svensson ◽  
Antoine Allanore ◽  
Nick Birbilis ◽  
...  
Keyword(s):  
Aluminium Alloys ◽  
Atmospheric Corrosion ◽  
Casting Method ◽  
Free Atmosphere ◽  
Surface Corrosion ◽  
Semi Solid ◽  
Carbon Dioxide Co2 ◽  
2D And 3D ◽  
Ambient Co2 ◽  
Ambient Levels

The localised corrosion of two magnesium-aluminium alloys produced by a semi-solid casting method was studied herein. Specifically, atmospheric corrosion, which comparatively less widely studied in the case of magnesium alloys, was explored for the alloys AM50 and AZ91. Gravimetry confirmed the beneficial effect from ambient levels of carbon dioxide (CO2) in suppressing corrosion through the formation magnesium hydroxy carbonates. Both 2D and 3D characterisation revealed that ambient CO2 has a strong influence on the morphology and rate of localised corrosion. A CO2-free atmosphere resulted in the formation of deep, clustered and interconnected corrosion, whereas ambient CO2 resulted in isolated and shallow surface corrosion. The results herein support the notion that the CO2 induced acidity causes neutralisation of the catholyte, diminishing the activity of the cathodic areas and inhibiting NaCl (aq) droplet coalescence.

Analysis on Microstructure of AlSi7Cu5 Alloy by Slope Near-Liquidus Method

2009 ◽  
Vol 419-420 ◽  
pp. 517-520 ◽  
Author(s):  
Shi Kun Xie ◽  
Xiao Qiu Zheng ◽  
Rong Xi Yi ◽  
Xiao Liang Pan ◽  
Xiu Yan Guo
Keyword(s):  
Thermal Conductivity ◽  
Metal Forming ◽  
Solid Metal ◽  
Casting Method ◽  
Alloy Casting ◽  
Novel Technology ◽  
Cooling Method ◽  
Average Grain Size ◽  
Near Net Shape ◽  
Semi Solid

SSM(Semi-solid metal) forming has been developed to become a novel technology in the 21st century for the formation of near net shape components, competing with conventional casting and forging technologies. In this paper, the casting microstructure and its change during remelting of AlSi7Cu5 alloy casting by slope near-liquidus method were researched. Experiments show that it has a significant impact on microstructure by cooling method, the thermal conductivity of the casting mold and casting method. The microstructure of AlSi7Cu5 alloy obtained by slope near-liquidus method at 600°C is uniform and small equiaxed Its average grain diameter is about 55.2um, and its average grain size roundness is about 2.13. The reheated microstructure which can be applied in thixo-forming preferable will be obtained by keeping constant temperature 25min at 580°C.

scholarly journals The influence of the structure on the fatigue properties of aluminium alloys for the casting

2018 ◽  
Vol 157 ◽  
pp. 07013 ◽  
Author(s):  
Milan Uhríčik ◽  
Peter Palček ◽  
Mária Chalupová ◽  
Martin Frkáň
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Aluminium Alloys ◽  
Cast Alloy ◽  
Fatigue Properties ◽  
Cast State ◽  
Casting Method ◽  
Testing Sample ◽  
Three Point Bending ◽  
Scanning Electron

The article will be focused on monitoring the influence of the structure on the fatigue properties of Al-Mg cast alloy. As an experimental material were used aluminium alloys EN AC 51200 and EN AC 51500, supplied in a cast state without a heat treatment, which were produced by the continuous casting method. These alloys were selected on the basis of the chemical composition, where the content of most alloying elements is comparable. Fatigue properties of aluminium alloys were tested by three-point bending cyclic loading. The fracture surface of the testing sample was examined using scanning electron microscopy (SEM), where samples were observed on various stages of the fatigue process, their characteristics and differences of fracture surfaces.

scholarly journals Localised atmospheric corrosion of magnesium-aluminum alloys produced by semi solid casting - A 2D and 3D investigation

CORROSION ◽  
10.5006/3655 ◽  
2020 ◽  
Author(s):  
Mehrdad Shahabi-Navid ◽  
Mats Halvarsson ◽  
Jan-Erik Svensson ◽  
Antoine Allanore ◽  
Nick Birbilis ◽  
...  
Keyword(s):  
Aluminium Alloys ◽  
Atmospheric Corrosion ◽  
Strong Influence ◽  
Casting Method ◽  
Free Atmosphere ◽  
Semi Solid ◽  
Carbon Dioxide Co2 ◽  
2D And 3D ◽  
Ambient Co2 ◽  
Ambient Levels

The localised corrosion of the two magnesium-aluminium alloys AM50 and AZ91produced by a semi-solid casting method was investigated under atmospheric corrosion conditions, in the presence of NaCl. Gravimetry confirmed the beneficial effect from ambient levels of carbon dioxide (CO2) in suppressing corrosion through the formation magnesium hydroxy carbonates. Both 2D and 3D characterisation revealed that ambient CO2 has a strong influence on the morphology and rate of localised corrosion. In CO2-free atmosphere, the alloys suffered localised corrosion resulting in clustered and interconnected cavities that extended deep into the material. In contrast, corrosion in the presence of ambient levels of CO2 (400 ppm) resulted in evenly distributed shallow corrosion sites. The results indicate that CO2 neutralises the cathodic areas resulting in diminished cathodic activity and inhibiting NaCl (aq) droplet coalescence.

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