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.

Effect of Erbium Addition on the Microstructure and Mechanical Properties of Aluminium Alloy

2019 ◽  
Vol 796 ◽  
pp. 62-66 ◽  
Author(s):  
Rosli Ahmad ◽  
N.A. Wahab ◽  
S. Hasan ◽  
Z. Harun ◽  
M.M. Rahman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Aluminium Alloy ◽  
Aluminium Alloys ◽  
Earth Metal ◽  
Hardness Test ◽  
Optical Microscope ◽  
Unmodified Alloy ◽  
Microstructure And Mechanical Properties ◽  
A380 Alloy

The effect of rare earth metal erbium (Er) modification on the microstructure and mechanical properties of aluminium alloys (A380) were investigated using Optical Microscope (OM), Scanning Electronic Microscope (SEM) attached with Electron Dispersive Scanning (EDS), Vicker’s hardness test and Ultimate Tensile Test (UTS). The results show that the addition of Er reduces the size of the silicon particle and improve mechanical properties of the aluminium alloy. In addition, by adding 0.1 wt. % of Er, the mean area (μm2) and aspect ratio value decreased. The coarse plate like existed in the unmodified alloy transformed into fine particle and short rod. The mechanical properties were investigated by using tensile test and Vicker’s hardness test. The ultimate tensile strength test shows that the tensile and the elongation increased 1.32 % and 9.1 % with 0.1 wt. % Er content of the aluminium alloys, respectively. The hardness improved from the addition of 0.1% Er aluminium A380 alloy.

Investigation on the Elastic Modulus of Rubber-Like Materials by Straight Blade Indentation Using Numerical Analysis

2015 ◽  
Vol 1123 ◽  
pp. 55-58 ◽  
Author(s):  
Budi Setiyana ◽  
F.D. Wicahyo ◽  
Rifky Ismail ◽  
J. Jamari ◽  
D.J. Schipper
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Tensile Test ◽  
Material Model ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Element Analysis ◽  
Theoretical Formulation ◽  
Straight Blade ◽  
Hyper Elastic

The indentation technique has been proven to be useful in determining mechanical properties of materials, but it is rarely applied to rubber-like materials (elastomers). It is difficult to describe accurately the mechanical properties of an elastomer by theoretical formulation due to its complex material behaviour. Indentation of a Styrene Butadiene Rubber (SBR-0) material by a rigid straight blade with a tip angle of 45 and 60 degrees was performed to estimate the elastic modulus. Indentation was carried out numerically by finite element analysis (FEA) and for the elastomer the hyper-elastic material model of Mooney-Rivlin is used. The estimated elastic modulus was calculated based on the contact depth. The predicted result was also verified by tensile test results. It was found that the predicted elastic modulus of the elastomer agrees with the tensile test result.

scholarly journals Study on Mechanical Properties of Polyester with Addition of Recycle Gift or Members Card

2021 ◽  
Vol 2080 (1) ◽  
pp. 012006
Author(s):  
Aimimi Mat Dam ◽  
Zakiah Kamdi
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Polymer Blend ◽  
Impact Test ◽  
Hardness Test ◽  
Product Usage ◽  
Gift Cards ◽  
The Gift ◽  
Environment Sustainability ◽  
Gift Card

Abstract Increasing usage of gift cards will end up increasing the waste. Instead of throwing in the dustbin, re-cycling the cards may help in increasing the product usage and contribute to the environment sustainability. In this study, the re-cycle gift cards were combined with polyester to produce polymer blend. The composition of re-cycle gift cards was 2, 4 and 6 wt%. The gift card was crush and mix with the polyester and hardener followed by casting to get the suitable shape based on the testing. Three testing was undergone to evaluate the polymer blend properties which are tensile test, Charpy’s impact test and Durometer hardness test. Similar trend was shown for all mechanical testing which showing an increase of performance from 2 to 4 wt% addition of recycle cards but reduce when achieved 6 wt%.

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 %.

Evaluation of Mechanical Properties of Surface Layer Injection Molded Polypropylene by Nanoindentation Test

2016 ◽  
Vol 699 ◽  
pp. 86-90
Author(s):  
David Manas ◽  
Miroslav Manas ◽  
Martin Ovsik ◽  
Michal Stanek ◽  
Pavel Stoklasek ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Layer ◽  
Elastic Modulus ◽  
Considerable Increase ◽  
Hardness Test ◽  
Beta Radiation ◽  
Nanoindentation Test ◽  
Indentation Hardness ◽  
Low Doses ◽  
Injection Molded

The influence of beta radiation on the changes in the structure and selected properties (mechanical and thermal) polymers were proved. The use of low doses of beta radiation for polypropylene and its influence on the changes of micro, macro mechanical properties was thoroughly studied. The specimens of polypropylene were made by injection molding technology and irradiated by low doses of beta radiation (0, 15 and 33 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using WAXS and instrumented nano hardness test. The results of the measurements showed considerable increase in mechanical properties (indentation hardness, indentation elastic modulus) when the beta radiation are used.

scholarly journals Improving Astm A516 Grade 70 Mechanical Properties by Sandblasting Process

2018 ◽  
Vol 7 (4.35) ◽  
pp. 216
Author(s):  
Omar Suliman Zaroog ◽  
S.A.P. Sughanthy ◽  
Mohd Rashdan Isa ◽  
M.N.M. Ansari
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Tensile Test ◽  
Hardness Test ◽  
Time Duration ◽  
Before And After ◽  
Tensile Test Result ◽  
Test Result

Nowadays, sandblasting is commonly use in industries. The ability of sandblasting is to remove any stain, unwanted matter and many other functions making this process generally used worldwide. The effect of sandblasting on mechanical properties of ASTM A516 grade 70 was investigated in this study. Samples of the material have been sandblasted with different size of grits and times. Surface roughness, hardness and tensile was measured before and after sandblasting. The roughness test result showed that when the time duration of sandblasting increased, the roughness of the specimen also increased. Based on hardness test result, it showed that the hardness improved when the smallest size of grits was applied. However, the hardness decreased when the size of grits and time was increased. The tensile test result pattern showed quite similar to hardness test result. The size of grits and time duration for sandblasting need to set depending on application of the sandblasting process usage applied to the samples or materials.

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 Determination of Thermo-Mechanical Properties of Recycled Polyurethane From Glycolysis Polyol

2021 ◽  
Vol 11 (4) ◽  
pp. 75-87
Author(s):  
James Njuguna ◽  
Peter Muchiri ◽  
Nancy Karuri ◽  
Fredrick Madaraka Mwema ◽  
Michael T. Herzog ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Glass Transition ◽  
Elastic Modulus ◽  
Transition Temperature ◽  
Hardness Test ◽  
Raw Material ◽  
Glass Transition Temperatures ◽  
D Values

This study aimed to determine the possible changes in thermo-mechanical properties between recycled polyurethane with benchmark polyurethane. The glycolysis polyol was used as a raw material for recycled polyurethane production. The glass transition temperature of the recycled polyurethane was determined using DSC. Tensile strength, elastic modulus, toughness, and hardness test of the recycled polyurethane were conducted at 24°C, 40°C, and 60°C. The glass transition temperatures for the recycled and the benchmark polyurethane occurred at 43°C and 50.4°C, respectively. Tensile strength for recycled polyurethane was lower than that of benchmark polyurethane by 29-43%. Recycled polyurethane recorded lower toughness than petroleum-based pure polyurethane by 13-16%. However, recycled polyurethane recorded high shored D values than the benchmark polyurethane by 9-29%. This study reveals that recycled polyol could be used as feedstock for polyurethane production with applications tailored to its mechanical properties.

scholarly journals Mechanical Properties and the Microstructure of β Ti-35Nb-10Ta-xFe Alloys Obtained by Powder Metallurgy for Biomedical Applications

Metals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 76 ◽  
Author(s):  
Angélica Amigó ◽  
Angel Vicente ◽  
Conrado Afonso ◽  
Vicente Amigó
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Powder Metallurgy ◽  
Bending Strength ◽  
Hardness Test ◽  
Microstructural Characterization ◽  
Fe Content ◽  
Uniaxial Compaction ◽  
The Stability ◽  
Advanced Biomaterials

Titanium alloys with high refractory metals content are required to obtain advanced biomaterials with a low elastic modulus and good mechanical properties. This work studies the influence of Fe content on the microstructure and mechanical properties of powder metallurgy Ti35Nb10Ta(Fe) alloys, with Fe content additions of 1.5, 3.0 and 4.5 wt%. Samples are obtained by uniaxial compaction and sintering at 1250 °C and 1300 °C. Microstructural characterization is performed by scanning and transmission electron microscopy and mechanical characterization by bending, compression and a hardness test. The elastic modulus is measured by the ultrasounds technique. The results show a 10% increase in the maximum bending strength with an increase in the sintering temperature. The obtained microstructure is composed of β-Ti phase (bcc) and some regions where laths of the α-Ti (hcp) phase occur along the grain boundaries. Fe addition slightly improves the stability of the β-Ti phase and conversely decreases the maximum strength and final deformability due to increased porosity. The Ti35Nb10Ta alloy composition displays better properties, with an elastic modulus of 75 GPa, a bending strength of 853 MPa and compression strength of 1000 MPa.

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