Effect of Pouring Temperature on Mechanical Properties and Microstructures of Aluminium Matrix Composite Strengthened by CNT with Stir Casting Method

2020 ◽  
Vol 988 ◽  
pp. 30-35
Author(s):  
Muhammad Syahid ◽  
Lukmanul H. Arma ◽  
Hairul Arsyad ◽  
Zulfikar A.R. Suwardi
Keyword(s):  
Mechanical Properties ◽  
Mechanical Strength ◽  
Matrix Composite ◽  
Hardness Test ◽  
Stir Casting ◽  
Mechanical Tests ◽  
Aluminium Matrix ◽  
Casting Method ◽  
Pouring Temperature ◽  
Aluminium Matrix Composite

Aluminium matrix composite reinforced Carbon nanoTubes are widely developed because it can increase mechanical strength without reducing its ductility. One of the AMC / CNT manufacturing processes is through the stir casting method. The challenge of the Al / CNT manufacturing process is the occurrence of agglomeration and CNT not homogeneous so that the right casting parameters are needed to obtain optimal results. The purpose of this study was to analyse the effect of pouring temperature on the mechanical strength and microstructure of AA6061 by adding Carbon Nanotube (CNT) through the stir casting method. The CNT is added by 0.1% wt and pouring temperature at 700 °C, 730 °C and 760 °C. Mechanical tests carried out were tensile test, hardness test, and impact test. The highest value of hardness and tensile strength was obtained at the pouring temperature of 700 °C are78 HV and 80.97 MPa. Lower pouring temperature causes smaller grain size so that it has higher strength. The distribution of hardness values ​​at the top, middle and bottom of the specimen is not evenly distributed, but does not differ greatly for all pouring temperatures. The highest value of impact strength is obtained at the pouring temperature of 760 °C which is 0.128 J/mm2. Microstructure was shown the addition of CNTs caused the size of primary silicon and aluminium grains to be small which would increase the mechanical properties.

scholarly journals The Effect of Stirrer Depth And Electroless Coating of Hardness And Tensile Strength in Aluminium Matrix Composite AL6061-AL2O3

2021 ◽  
Vol 20 (1) ◽  
pp. 23
Author(s):  
Sukma Andini ◽  
Eko Surojo ◽  
Teguh Triyono
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Physical And Mechanical Properties ◽  
Hardness Test ◽  
Stir Casting ◽  
Industrial Sector ◽  
Aluminium Matrix Composite ◽  
Electroless Coating

Metal matrix composite (MMC) are composite materials that are widely used in the industrial sector. Examples of metal matrix composites are Al6061 as matrix alloys and Al<sub>2</sub>O<sub>3</sub> as reinforcement. In general, making Al6061-Al<sub>2</sub>O<sub>3 </sub>composites using the stir casting method. The stirring parameter in the stir casting affects the physical and mechanical properties of the composites. The physical and mechanical properties of composites can be improved by increasing the wettability of the reinforcement. This research was conducted to determine the effect of the depth of stirring and electroless coating treatment on the hardness and tensile strength of Al6061-Al<sub>2</sub>O<sub>3</sub> composites. The process of making composites with Al<sub>2</sub>O<sub>3</sub> reinforcing particles with 6% weight fraction mixed with aluminum alloys and 2.5% magnesium powder as a wetting agent. Variations of this study were the depth of the stirrer and electroless coating treatment. The depths of stirring used for the experiment were 30%, 45%, and 60% of the height of the fluid. The testing phases in this study were the density and porosity test, metallographic observation, hardness test, and tensile test. The most efficient variation of the mixer depth was obtained at a mixer depth of 30% of the fluid height. The highest hardness and tensile strength test results are hardness value of 72.43 HBN and tensile strength of 182.19 MPa with electroless coating reinforcement treatment

scholarly journals Properties of AlSi9Cu3 metal matrix micro and nano composites produced via stir casting

2018 ◽  
Vol 16 (1) ◽  
pp. 726-731 ◽  
Author(s):  
Tennur Gülşen Ünal ◽  
Ege Anıl Diler
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix ◽  
Weight Fraction ◽  
Stir Casting ◽  
Mechanical Tests ◽  
Matrix Composites ◽  
Casting Method ◽  
Porosity Formation ◽  
Three Point Bending ◽  
Hardness Values

AbstractThe effects of micro and nano sized reinforcement particles on microstructure and mechanical properties of aluminium alloy-based metal matrix composites were investigated in this study. AlSi9Cu3 alloy was reinforced with micro and nano sized ceramic reinforcement particles at different weight fractions by using a stir casting method. The mechanical tests (hardness, three point bending) were performed to determine the mechanical properties of AlSi9Cu3 alloy-based microcomposites (AMMCs) and nanocomposites (AMMNCs). The experimental results have shown that the size and weight fraction of reinforcement particles have a strong influence on the microstructure and the mechanical properties of AlSi9Cu3 alloy-based microcomposites and nanocomposites. The relative densities of all AMMC and AMMNC samples are lower than unreinforced AlSi9Cu3 alloy due to porosity formation with the increase of weight fraction of reinforcement particles. As weight fraction increases, hardness values of AMMCs and AMMNCs increase. Maximum flexural strength can be obtained at 3.5wt.% for the AMMC sample with microsized Al2O3 particles and at 2wt.% for the AMMNC sample with nano-sized Al2O3 particles. After the weight fractions exceed these values, flexural strengths of both AMMCs and AMMNCs decrease due to clustering of Al2O3 particles.

scholarly journals Hot compression behaviour and microstructural evolution in aluminium based composites: an assessment of the role of reinforcements and deformation parameters

2021 ◽  
Vol 8 ◽  
pp. 6
Author(s):  
Saheed Adeoye Babalola ◽  
Kenneth Kanayo Alaneme ◽  
Samuel Ranti Oke ◽  
Lesley Heath Chown ◽  
Nthabiseng Beauty Maledi ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Matrix Composite ◽  
Stir Casting ◽  
Hot Compression ◽  
Compression Testing ◽  
Aluminium Matrix ◽  
Aluminium Matrix Composite ◽  
Casting Technique ◽  
Deformation Parameters ◽  
Dynamic Recrystallisation

The response of two different types of aluminium matrix composites (AMCs) reinforced with silicon carbide ceramic particulates or nickel metallic particulates to hot compression testing parameters was evaluated. The composites were produced via two-step stir-casting technique. Axisymmetric compression testing was performed on the samples at different deformation temperatures of 220 and 370 °Ϲ, 0.5 and 5 s−1 strain rates and total strains of 0.6 and 1.2. The initial and post-deformed microstructures were studied using optical and scanning electron microscopy. The results show that flow stress was significantly influenced by imposed deformation parameters and the type of reinforcements used in the AMCs. Nickel particulate reinforced aluminium matrix composite (AMC) showed superior resistance to deformation in comparison with silicon carbide reinforced AMC under the different testing conditions. In both AMCs, work hardening, dynamic recovery and dynamic recrystallisation influenced their response to imposed parameters. The signature of dynamic recrystallisation was very apparent in aluminium matrix composite reinforced with nickel particulates.

scholarly journals Investigation of Mechanical Properties for Titanium Alloy TI-6AL-4V-SS316

2020 ◽  
Vol 3 (9) ◽  
pp. 59-61
Author(s):  
P. Arulmurugan ◽  
J. Venkatraman ◽  
P. Saravanan
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Bone Cells ◽  
High Strength ◽  
Hardness Test ◽  
Stir Casting ◽  
Casting Method ◽  
High Corrosion Resistance ◽  
Inherent Advantage

Titanium and its alloys are being extensively research and are applied relatively in different field of dentistry in since 1970s. Inherent advantage like high strength, ductility, Low modules of plasticity, high corrosion resistance as titanium alloy (Ti 6A 4V ELI –SS316). It is also light weight and highly tolerant to damage by other the alloy content. It is iron are mixing so forming the corrosion resistance and magnetism effect. So to add aluminum, vanadium and carbon content increases and iron content was decrease the various percentage for metal matrix composite(MMC) methods and stainless steel ss316 add by using stir casting method, and to check the hardness test, corrosion test and chemical specification and mechanical properties of the materials. To avoid the bone cells loss and bone desorption. It has superior biocompatibility making it easy to gratin and attach to bone all which being accepted by the human body.  

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