scholarly journals Synthesis of Al-Fly Ash Composites by Modified Two Step Stir Casting Method

2012 ◽  
Vol 488-489 ◽  
pp. 775-781 ◽  
Author(s):  
P. Shanmughasundaram ◽  
R. Subramanian ◽  
G. Prabhu
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Matrix Material ◽  
Casting Process ◽  
Stir Casting ◽  
Casting Method ◽  
Industrial Preparation ◽  
The Matrix ◽  
Method Analysis ◽  
Properties Of Composites

In the stir casting process, homogeneous dispersion of reinforcing particles within the matrix material is one such major problem, which influences on the properties of composites. In this research, an attempt has been made to study the influence of fly ash wt.% (10 ,15 and 20), ratio of the impeller outer dia to crucible inner dia (0.7,0.5 and 0.3) and processing method (liquid state stirring, two step stirring and modified two step stirring) on the mechanical properties and the distribution of fly ash particles in the Al matrix.Optimum parameters were identified for attaining the maximum mechanical properties such as hardness and tensile strength of composites by the application of Taguchi method, Analysis of Variance (ANOVA) and the results were validated by confirmation test.The present work could provide a guide for the industrial preparation of composites.

Physical and Mechanical Properties of Composites with Aluminum Alloy Matrix Designed for Metal Forming

2013 ◽  
Vol 212 ◽  
pp. 59-62 ◽  
Author(s):  
Jerzy Myalski ◽  
Jakub Wieczorek ◽  
Adam Płachta
Keyword(s):  
Mechanical Properties ◽  
Metal Forming ◽  
Matrix Material ◽  
Physical And Mechanical Properties ◽  
Mechanical Mixing ◽  
Alloy Matrix ◽  
Segregation Process ◽  
The Matrix ◽  
Glass Carbon ◽  
Properties Of Composites

The change of matrix and usage of the aluminum alloys designed for the metal forming in making the composite suspension allows to extend the processing possibility of this type of materials. The possibility of the metal forming of the composites obtained by mechanical mixing will extend the range of composite materials usage. Applying of the metal forming e.g. matrix forging, embossing, pressing or rolling, will allow to remove the incoherence of the structure created while casting and removing casting failures. In order to avoid the appearance of the casting failures the homogenization conditions need to be changed. Inserting the particles into the matrix influences on the shortening of the composite solidification. The type of the applied particles influenced the sedimentation process and reinforcement agglomeration in the structure of the composite. Opposite to the composites reinforced with one-phase particles applying the fasess mixture (glassy carbon and silicon carbide) triggered significant limitation in the segregation process while casting solidification. Inserting the particles into the AW-AlCu2SiMn matrix lowers the mechanical properties tension and impact value strength. The most beneficial mechanical properties were gained in case of heterofasess composites reinforced with the particle mixture of SiC and glass carbon. The chemical composition of the matrix material (AW-AlCu2SiMn) allows to increase additionally mechanical characteristics by the precipitation hardening reached through heat casting forming.

Fabrication and Characterization of A356-Basalt Ash-Fly Ash Composites Processed by Stir Casting Method

2017 ◽  
Vol 25 (3) ◽  
pp. 209-214 ◽  
Author(s):  
G. Venkatachalam ◽  
A. Kumaravel
Keyword(s):  
Fly Ash ◽  
Impact Strength ◽  
Hybrid Composites ◽  
Cost Effective ◽  
Weight Fraction ◽  
Stir Casting ◽  
Matrix Composites ◽  
Casting Method ◽  
The Matrix

This paper presents the characterization of A356 composite reinforced with fly ash and basalt ash produced by stir casting method. Aluminium metal matrix composites (AMC) are used in wide variety of applications such as structural, aerospace, marine, automotive etc. Stir casting is cost effective manufacturing process and it is useful to enhance the attractive properties of AMCs. Three sets of hybrid AMC are prepared by varying the weight fraction of the reinforcements (3% basalt + 7% fly ash, 5% basalt + 5% fly, 7% basalt + 3% fly ash). The effect of reinforcements on the mechanical properties of the hybrid composites such as hardness, tensile, compressive and impact strength were studied. The obtained results reveal that tensile, compressive and impact strength was increased when weight fraction of fly ash increased, whereas the hardness increases when weight fraction of the basalt ash increased. Microscopic study reveals the dispersion of the reinforcements in the matrix.

scholarly journals Optimizing The Addition of TiB to Improve Mechanical Properties of the ADC 12/SiC Composite Through Stir Casting Process

2019 ◽  
Vol 130 ◽  
pp. 01005
Author(s):  
Cindy Retno Putri ◽  
Anne Zulfia Syahrial ◽  
Salahuddin Yunus ◽  
Budi Wahyu Utomo
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Wear Resistance ◽  
Aluminum Alloy ◽  
Casting Process ◽  
Stir Casting ◽  
Automotive Application ◽  
Alloying Element ◽  
Brake Shoe ◽  
The Matrix

The goal of this research is to improve the mechanical properties such as strength, hardness and wear resistance for automotive application such as brake shoe and bearings due to high cycle, load and impact during their usage. Therefore, another alloying element or reinforcement addition is necessary. In this work, the composites are made by ADC 12 (Al-Si aluminum alloy) as the matrix and reinforced with micro SiC through stir casting process and TiB is added various from (0.04, 0.06, 0.15, 0.3 and 0.5) wt.% that act as grain refiners and 5 wt.% of Mg is added to improve the wettability of the composites. The addition of TiB improves the mechanical properties because the grain becomes finer and uniform, and the addition of Mg makes the matrix and reinforce have better adhesion. The results obtained that the optimum composition was found by adding 0.15 wt.% of TiB with tensile strength improve from 98 MPa to 136.3 MPa, hardness from 35 to 53 HRB and wear rate reduced from 0.006 2 mm3 s−1 to 0.002 3 mm3 s−1 respectively.

scholarly journals Recent studies on particulate reinforced AZ91 magnesium composites fabricated by Stir casting – A review

2020 ◽  
Vol 4 (2) ◽  
pp. 115-126
Author(s):  
Anil K. Matta ◽  
Naga S. S. Koka ◽  
Sameer K. Devarakonda
Keyword(s):  
High Performance ◽  
Matrix Material ◽  
Weight Ratio ◽  
High Strength ◽  
Casting Process ◽  
Stir Casting ◽  
Critical Conditions ◽  
Matrix Composites ◽  
The Matrix ◽  
Magnesium Composites

Magnesium Metal Matrix Composites (Mg MMC) have been the focus of consideration by many researchers for the past few years. Many applications of Mg MMCs were evolved in less span of time in the automotive and aerospace sector to capture the benefit of high strength to weight ratio along with improved corrosion resistance. However, the performance of these materials in critical conditions is significantly influenced by several factors including the fabrication methods used for processing the composites. Most of the papers addressed all the manufacturing strategies of Mg MMC but no paper was recognized as a dedicated source for magnesium composites prepared through stir casting process. Since stir casting is the least expensive and most common process in the preparation of composites, this paper reviews particulate based Mg MMCs fabricated with stir casting technology. AZ91 series alloys are considered as the matrix material while the effect of different particle reinforcements, sizes , weight fractions on mechanical and tribological responses are elaborated in support with micro structural examinations. Technical difficulties and latest innovations happened during the last decade in making Mg MMCs as high performance material are also presented.

scholarly journals Effect of fly ash particle reinfo rcement on microstructure, porosity and hardness in Al-(Si-Mg) cast composites

2017 ◽  
Vol 23 (1&2) ◽  
pp. 113 ◽  
Author(s):  
M.B. Harun ◽  
S.R. Shamsudin ◽  
H. Yazid ◽  
Z. Selamat ◽  
M.S. Sattar ◽  
...  
Keyword(s):  
Fly Ash ◽  
Casting Process ◽  
Matrix Alloy ◽  
Stir Casting ◽  
Image Analyzer ◽  
Microscopy Image ◽  
Optical Microscopy Image ◽  
Cast Composites ◽  
The Matrix ◽  
Scanning Electron

The microstructure of cast Al-4Si-Mg reinforcedwith fly ash particles at various particlecontents has been studied. The composites were fabricated by stir casting process andcharacterized by optical microscopy, image analyzer, scanning electron microscopy and hardness measurements. The results showed that particle contents affected to the presence oforosities and hardness of the composites. It was observed that increasing the fly ash contentincrease the porosity in the composites, with the matrix alloy reinforced with 15 wt.% of fly ash particles having the highest porosity and lowest hardness.

Synthesis and Characterization of Al 7075 Alloy Reinforced with Silicon Carbide and Fly Ash

2019 ◽  
Vol 11 (3) ◽  
Author(s):  
G. Sathishkumar ◽  
S.J. Irudayaraja ◽  
S. Sivaganesan ◽  
M. Thuyavan
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Casting Process ◽  
Stir Casting ◽  
Industrial Applications ◽  
Matrix Composites ◽  
Specific Strength ◽  
Al 7075 ◽  
7075 Alloy

Metal matrix composites are of great interest in industrial applications for its light weight with high specific strength, stiffness and heat resistance. The processing of MMCs by stir casting process is an effective way of manufacturing. In this paper the comparison of mechanical properties of Aluminium 7075 as a base metal and varying composition of fly ash by 3 and 6 wt.% SiC and 7% fly ash as reinforcement is carried out. Scanning electron microscope was used to confirm the presence of SiC and fly ash. The composites with 6% SiC was found to have maximum hardness whereas composites of 6% and 5 % fly ash were found to have minimum hardness. The mechanical properties such as wear resistance were studied. From the results, it has been finalized that the addition of 6% SiC was identified to show the least wear rate.

Damage modeling and critical damage evaluation of AA2014 cast alloy embedded with fly ash composite under upsetting

2019 ◽  
Vol 233 (15) ◽  
pp. 5227-5236 ◽  
Author(s):  
Ch HariKrishna ◽  
MJ Davidson
Keyword(s):  
Fly Ash ◽  
Ductile Fracture ◽  
Cast Alloy ◽  
Matrix Material ◽  
Casting Process ◽  
Stir Casting ◽  
Damage Evaluation ◽  
Primary Metal ◽  
Cast Alloys ◽  
Critical Damage

Abstract: Upsetting is one of the primary metal forming techniques and needs to be applied to reduce the cross section of the billets for further processing. Ductile fracture in metal upsetting process is an issue and depends on the material used and processing conditions. The current work focus is on the critical damage evaluation of AA2014 cast alloy embedded with fly ash composite. AA2014 alloy was heated to a pouring temperature of 750 ℃ and fly ash of 3% and 6% were added separately with AA2014 matrix material to prepare three sets of cast alloys namely pure AA2014, AA2014 + 3% fly ash, and AA2014 + 6% fly ash. After manufacturing three sets of rods from stir casting process, three sets of billets were machined to a height and diameter of 24 mm. Three sets of billets were compressed between rigid dies to different levels of strain until the initiation of fracture. Ductile fracture criterions were modeled to evaluate the critical damage value and fracture loci were constructed for different compositions.

Microstructure and Mechanical Properties of Al6061-Graphite Composites Fabricated by Stir-Casting Process

2015 ◽  
Vol 766-767 ◽  
pp. 308-314 ◽  
Author(s):  
Madeva Nagaral ◽  
V. Auradi ◽  
S.A. Kori
Keyword(s):  
Mechanical Properties ◽  
Microstructural Characterization ◽  
Casting Process ◽  
Stir Casting ◽  
Casting Technique ◽  
Hardness Tests ◽  
Al6061 Alloy ◽  
Graphite Composites ◽  
Strength And Ductility ◽  
Properties Of Composites

In the present study, the experimental results of the mechanical properties of Al6061-Graphite composites presented. The composites containing 6 to 9 wt% of graphite in steps of 3 wt% were prepared using liquid metallurgy route in particular stir casting technique. For each composite, reinforcement particles were preheated to a temperature of 250°C and then dispersed in steps of two into the vortex of molten Al6061 alloy to improve the wettability and distribution. Microstructural characterization was investigated by optical and scanning electron microscopy. Tensile and hardness tests were carried out in order to identify mechanical properties of composites. The results of microstructural study revealed uniform distribution of graphite particles and low porosity in micro composite specimens.The results of this study revealed that as graphite percentage was increased, there was significant increase in ultimate tensile strength, yield strength and ductility, accompanied by a nominal drop in the hardness of the material

scholarly journals Optimization of Machining Parameters in Drilling of Aluminum Matrix Composites (LM6/Fly Ash) utilizing Taguchi Technique

2019 ◽  
Vol 9 (2) ◽  
pp. 1229-1232 ◽  
Keyword(s):  
Fly Ash ◽  
Thrust Force ◽  
Matrix Material ◽  
Aluminum Matrix ◽  
Casting Process ◽  
Stir Casting ◽  
Aluminum Matrix Composites ◽  
Feed Speed ◽  
Machining Parameters ◽  
The Impact

The present study revolves around the possibility of setting machining parameters in the drilling of composites of aluminum matrix (LM6/Fly ash) using the signal to noise ratio analysis. The aim of this work is to consider, the impact of input parameters, feed, speed, drill and percentage of composite material reinforcement on thrust force during AMCs drilling. AMCs were manufactured by the stir casting process with LM6 aluminium alloy as matrix material and fly ash as reinforcement material. Investigations were directed on a CNC vertical machining center for estimating thrust force. The Taguchi strategy for trial configuration is a generally admitted system employed for delivering great items requiring less effort. In the same way, L27 orthogonal array is employed for the analyses. The response table, graphs and variance analyzes are used to demonstrate the potential environment and the effects of machining parameters. It is evident that there is a tremendous improvement in the drilling procedure by using this methodology.

scholarly journals Microstructural and Mechanical Properties of AZ31B/Graphene Nanocomposite Produced by Stir Casting

2021 ◽  
Vol 31 (1) ◽  
pp. 51-56
Author(s):  
Ashish Kumar Srivastava ◽  
Ambuj Saxena ◽  
Nagendra Kumar Maurya ◽  
Shashi Prakash Dwivedi
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Magnesium Alloy ◽  
Matrix Material ◽  
Microstructural Analysis ◽  
Stir Casting ◽  
Reinforcement Particle ◽  
Casting Technique ◽  
Reinforcement Material ◽  
The Matrix

In the current scenario, the development of high strength and low weight material is the demand of the aerospace defence organizations. Magnesium alloy based composite has low density, good mechanical and physical properties. In this study, magnesium alloy AZ31B is used as reinforcement material and graphene nanoparticle is used as reinforcement material. Stir casting technique is used for the development of composite material. Three weight percentages i.e. 0.4%, 0.8% and 1.2% are used for the casting. The microstructural analysis is performed to validate the presence of graphene particles in the developed composite. Further mechanical properties such as tensile strength, hardness and toughness are evaluated. Experimental results confirm that GNPs particles are uniformly distributed into the matrix material. It was observed that due to the reinforcement of GNPs particles tensile strength of the material is improved by 31.17%, hardness is improved about 46.9%. However, the peak value of toughness is observed 12.6 Jule/cm2 in the matrix material, it decreases by increasing the wt% of reinforcement particle and lowest value of toughness of 6.82 Jule/cm2 is observed in AZ31B/1.2%GNP composite.

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