scholarly journals Effect of Pouring Temperature on Mechanical Properties of Semisolid Cast A319 Aluminum Alloy

2020 ◽  
Vol 9 (3) ◽  
pp. 3755-3758
Keyword(s):  
Mechanical Properties ◽  
Semisolid Slurry ◽  
Inclined Plate ◽  
Pouring Temperature ◽  
Continuous Formation ◽  
Ferrous Metals ◽  
Aluminium Copper ◽  
A319 Alloy ◽  
Non Ferrous Metals ◽  
Semisolid Casting

Semisolid metal (SSM) casting or thixoforming is a technique used to produce near net-shaped products. The process is used with non-ferrous metals, such as aluminium, copper and magnesium. Furthermore, it has advantage over conventional casting due to suppression of dendrite growth. In the present work, the semisolid casting of A319 aluminium alloy has been carried out by using an inclined plate with different melt pouring temperatures (620, 625, 630 and 635 °C). A319 alloy melt undergoes partial solidification when it flows down on an inclined plate. It results in continuous formation of columnar dendrites on plate wall. Due to forced convection, these dendrites are sheared off into equiaxed or fragmented grains and then washed away continuously to produce semisolid slurry at plate exit. The prepared castings were checked for their mechanical properties like tensile, hardness and impact strength. The results obtained were compared with that of alloy prepared from conventional sand casting. It was found that there is an enhancement in mechanical properties due to shearing off columnar dendrites.

scholarly journals DEVELOPMENT OF NEURAL NETWORKS FOR FORECASTING ROUGHNESS WHEN MILLING VARIOUS MATERIALS

2020 ◽  
Vol 5 (11) ◽  
pp. 113-124
Author(s):  
E. Erygin ◽  
T. Duyun
Keyword(s):  
Mechanical Properties ◽  
Neural Networks ◽  
Stainless Steels ◽  
Cutting Speed ◽  
Physical And Mechanical Properties ◽  
Ferrous Metals ◽  
Material Hardness ◽  
Non Ferrous Metals ◽  
And Training ◽  
Cutting Modes

The article presents a methodology for the development and testing results of artificial neural networks for predicting roughness in finishing milling. Experimental data of various researchers in the processing of materials with different physical and mechanical properties are used as the initial data base for the creation and training of neural networks. The value of material hardness is taken as the main identifier of physical and mechanical properties. In addition to the hardness of the material, the input parameters of the nets are also the cutting modes: tool feed, depth and cutting speed. The data of the obtained roughness are used for several groups of materials: non-ferrous metals, structural and stainless steels, heat-resistant alloys and tool steel. Nine highly specialized neural networks have been created that predict roughness when milling a certain material, a number of combined networks by combining several databases, including a broad-based neural network for several groups of materials. A comparative analysis of the results of testing the developed neural networks by the criterion of relative error is carried out. Most of the presented neural networks have a satisfactory error not exceeding 10%. Individual neural networks have higher accuracy, showing an error within 5 %.

Microstructure Evolution and Mechanical Properties of Rheocast A319 Aluminum Alloy Using Cooling Slope

2014 ◽  
Vol 663 ◽  
pp. 261-265
Author(s):  
M.S. Salleh ◽  
M.Z. Omar ◽  
Junaidi Syarif ◽  
M.N. Mohammed ◽  
K.S. Alhawari
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Automotive Industry ◽  
Primary Phase ◽  
Pouring Temperature ◽  
Cooling Slope ◽  
Subsequent Separation ◽  
A319 Alloy ◽  
Slope Wall ◽  
Cast Condition

A319 aluminum alloys are commonly used in automotive industry due to a combination of good fluidity and mechanical strength. In this present work, cooling slope (CS) rheocasting process was employed to produce A319 billets with near spherical morphology of primary Al phase. The dendritic primary phase in the cast A319 alloy had readily transformed into non-dendritic when the ingots were cast over a cooling plate from pouring temperatures between 620°C and 640°C and with cooling lengths of between 300 mm and 400 mm. The shear driven flow of the solidifying melt on the cooling slope wall promotes heterogeneous nucleation of α-Al phase and subsequent separation from there due to shear driven flow of the solidifying melt produced nearly spheroidal morphology of the primary phase in the microstructure. The results show that the best combination of pouring temperature and cooling length was found to be 630°C and 400 mm respectively. The hardness of the rheocast ingots improved to 85.3 HV from 81.8 HV in as-cast condition.

scholarly journals Modern Methods of Creating Casting Model Kits

2018 ◽  
pp. 125-130 ◽  
Author(s):  
M. L. Kalinichenko ◽  
L. P. Dolgiy ◽  
S. L. Rovin ◽  
V. A. Kukareko ◽  
U. A. Kalinichenko
Keyword(s):  
Mechanical Properties ◽  
Mass Production ◽  
High Strength ◽  
Strength Model ◽  
Model Sets ◽  
Ferrous Metals ◽  
Adhesive Compositions ◽  
Modern Methods ◽  
Non Ferrous Metals ◽  
The Individual

The article presents some information about creation of model kits and core equipment for the manufacture of molds and rods of cold-hardening sand-clay mixtures in the individual, serial and mass production of castings of ferrous and non-ferrous metals. There was analyzed their constituent materials and investigated a number of mechanical properties of the binding components for their attachment. Was shown the analysis of adhesive compositions of the world’s leading manufacturers, used for the manufacture of high-strength model sets by 3D milling methods.

scholarly journals Pengaruh penambahan Silikon pada remelting piston motor bekas menggunakan tungku induksi terhadap kekuatan tarik dan kekerasan

2021 ◽  
Vol 10 (2) ◽  
Author(s):  
Eko Nugroho ◽  
Eko Budiyanto ◽  
Aji Dawam Firdaus
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Tensile Test ◽  
Induction Furnace ◽  
Hardness Test ◽  
Light Weight ◽  
Ferrous Metals ◽  
Non Ferrous Metals

Aluminum is one of the most widely used non-ferrous metals in industry and engineering because of its light weight and resistance to corrosion. The purpose of this study is to change the waste of used motor pistons using an induction furnace by recycling or remelting the material and adding a mixture of silicon with variations of 8%, 10% and 12% to improve its mechanical properties. In this research, I used the main furnace for the smelting. The results of this study in the tensile test showed that the strength and wear strength increased with the addition of silicon elements but became brittle and stiff this happened because the value of the elastic modulus decreased with the addition of silkon elements, namely at 12% at 1.06 N/mm² and at a variation of 8 % of 1.13 N/mm². In the hardness test, it was found that the addition of silicon to aluminum with variations of 8%, 10% and 12% increased the hardness of the material.

scholarly journals Structure and Properties Research of Casts Made with Copper Alloys Matrix

2014 ◽  
Vol 59 (2) ◽  
pp. 775-778 ◽  
Author(s):  
S. Rzadkosz ◽  
A. Garbacz-Klempka ◽  
J. Kozana ◽  
M. Piękoś ◽  
M. Kranc
Keyword(s):  
Mechanical Properties ◽  
Copper Alloys ◽  
Science And Technology ◽  
Copper Matrix ◽  
Casting Defects ◽  
Structure And Properties ◽  
Research Results ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
The University

Abstract The article presents the research results obtained at the Department of Foundry of Non-Ferrous Metals at the Foundry Faculty of AGH, the University of Science and Technology, in Krakow. The research comprises the processes connected with the technology of melting, refining and making casts based on copper matrix, both contemporary and historical, especially bronzes containing tin, zinc and lead. These issues are well-known but they still pose problems for contemporary foundries. The article presents the results of modifying formulas on the improvement of mechanical properties and limiting casting defects.

scholarly journals PENGARUH UNSUR SILIKON PADA ALUMINIUM ALLOY (Al – Si) TERHADAP SIFAT MEKANIS DAN STRUKTUR MIKRO

POROS ◽  
2017 ◽  
Vol 14 (1) ◽  
pp. 49
Author(s):  
Ratih Ponco K.S ◽  
Erwin Siahaan ◽  
Steven Darmawan
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloy ◽  
Pure Aluminum ◽  
Element Content ◽  
Micro Structure ◽  
Dominant Form ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Si Content ◽  
Aluminum Silicon

Abstract: PENGARUH UNSUR SILIKON PADA ALUMINIUM ALLOY (Al – Si) TERHADAP SIFAT MEKANIS DAN STRUKTUR MIKRO Ratih Ponco K.S., Erwin Siahaan dan Steven Darmawan Jurusan Teknik Mesin, Fakultas Teknik Universitas Tarumanagara Aluminum is one of type in material non-ferrous metals are frequently and widely used in fields of application in industry. One application that performed in the industrial world, namely Aluminum Silicon (AlSi) which are used for the motor piston components. To get better mechanical properties then the integration of Aluminum Silicon research done by arranging the variety of Si element content on a percentage of 6, 8, and 10% Si.Testing is done by using a blend of 10% genuine with further lowering the Si content to reach 6% and 8% by adding pure aluminum. The test showed that the level of harness decreased 12,5% and also the ability of toughness decreased by 4%. Observation show that the microstructure is relatively homogeneous and there is a dominant form of micro-structure of pure Al and several dendrites CuAl. 

Semisolid Casting and Die Casting of Al-4.8%Mg-2%Si Alloy

2022 ◽  
Vol 327 ◽  
pp. 172-177
Author(s):  
Toshio Haga ◽  
Shinichiro Imamura ◽  
Ryota Miwa ◽  
Hiroshi Fuse
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Die Casting ◽  
Casting Machine ◽  
Side Length ◽  
Semisolid Slurry ◽  
Fine Grained ◽  
Semisolid Casting ◽  
Circular Base

An aluminum alloy, Al–4.8%Mg–2%Si, was cast by die casting and thixocasting, and the properties of the cast specimens were investigated. When the poured molten metal temperature was lower than 640 °C during die casting, it was lower than the liquidus temperature, and the metal became a semisolid slurry in the sleeve of the die casting machine; this fulfills the conditions for rheocasting. A tension test was conducted to investigate the effects of semisolid casting on the mechanical properties of Al–4.8%Mg–2%Si. The ultimate tensile strength and elongation of the ingots cast by die casting and rheocasting were affected by the size of ingot. When the ingot had a circular base of 4.5 mm diameter, the ultimate tensile strength and elongation were excellent; however, when the cross section of the ingot was a square with a side length of 20 mm, the tensile strength and elongation were inferior. The thixocasting was conducted using square ingots with a side length of 20 mm, and the tensile strength and elongation were poor in this case as well. The results of this study demonstrate that semisolid casting cannot improve the mechanical properties of Al–4.8%Mg–2%Si ingots with a high thickness. Semisolid casting cannot produce fine-grained Mg2Si, and the mechanical properties of the material could not be improved by this casting method.

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