Influence of precipitation hardening parameters on the microstructure and mechanical properties of extruded AA2014/eggshells green composites

2017 ◽  
Vol 51 (30) ◽  
pp. 4261-4271 ◽  
Author(s):  
Shashi Prakash Dwivedi ◽  
Satpal Sharma ◽  
Raghvendra Kumar Mishra
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Precipitation Hardening ◽  
Testing Machine ◽  
Stir Casting ◽  
Casting Technique ◽  
Electromagnetic Stir Casting

The AA2014/5 wt. % carbonized eggshells metal matrix composite used in this study was fabricated by electromagnetic stir casting technique and immediately extruded on universal testing machine at 60 MPa using cylindrical H13 tool steel die coated with graphite to avoid upper flow of eggshells particles and to improve wettability of eggshells with AA2014 alloy. Microstructures of composites show some agglomerations in non-extruded samples while uniform distribution of carbonized eggshell particles. Optimum combination of precipitation hardening parameters achieved using response surface methodology to further improve the properties of AA2014/5 wt. % eggshell composites. Optimum values of solutionizing time, aging temperature and aging time were found to be 4.5 h, 250℃ and 13.5 h, respectively. More grain refinement of extruded AA2014/5 wt. % eggshell composites were observed after heat treatment at optimum precipitation hardening parameters. After heat treatment, fractographs of the AA2014/5 wt. % eggshells composite showed that fracture is dominated by trans-granular type. Density of the AA2014 is 5% higher than AA2014/5 wt. % eggshells metal matrix composite. It is observed that mechanical properties improve when carbonized eggshell particles are reinforced in matrix AA2014 aluminium alloy. After the heat treatment at optimum precipitation hardening parameters, mechanical properties are further improved.

Effect of Flyash and Alumina Reinforcement on Mechanical Properties of AL7075 based Metal Matrix Composite

2018 ◽  
Vol 6 (9) ◽  
pp. 50
Author(s):  
Madan Kumar K.N. ◽  
G. M. Satyanarayana
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Tensile Properties ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Stir Casting ◽  
Parent Metal ◽  
Casting Technique ◽  
Reinforced Composite

Aluminium based composite are getting a vast scope nowadays because of its properties and availability. In the present work, fly ash and AL2O3 reinforced composite are prepared using stir casting technique for varying wt.% (fly ash 3% and AL2O3 3%, 6% & 9%). Hardness and tensile properties were determined, with the addition of reinforcement the properties are improved compared to the parent metal alone. Based on the evaluation 6% AL2O3 and 3%fly ash gives a better result as compared to other composition.

Synthesis and mechanical behaviour of green metal matrix composites using waste eggshells as reinforcement material

2016 ◽  
Vol 5 (3) ◽  
Author(s):  
Shashi Prakash Dwivedi ◽  
Satpal Sharma ◽  
Raghvendra Kumar Mishra
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Testing Machine ◽  
Matrix Alloy ◽  
Stir Casting ◽  
Matrix Composites ◽  
Casting Technique ◽  
The Matrix ◽  
Chicken Eggshell

AbstractChicken eggshell (ES) is an aviculture by-product that has been listed worldwide as one of the worst environmental problems. The effective utilisation of ES biowaste is strongly encouraged in our society due to environmental and economic reasons. The aluminium alloy (AA) 2014/5 wt% carbonised ES metal matrix composite used in this study was fabricated by electromagnetic stir casting technique at parameters of 12 A (current), 180 s (time) and 700°C (matrix pouring temperature), respectively, and immediately extruded on universal testing machine at 60 MPa using cylindrical H13 tool steel die coated with graphite to avoid upper flow of ES particles and to improve wettability of carbonised ES with AA2014 alloy. Microstructures of composites show uniform distribution of carbonised ES particles. Density and overall cost of the metal matrix composite decreases 3.57% and 5%, respectively, when carbonised ES particulate is added 5% by weight. Tensile strength, hardness, toughness and fatigue strength of AA2014/5 wt% carbonized eggshell composite were also measured. Results show an improvement in these mechanical properties with addition of ES in the matrix alloy.

Effect of Heat Treatment on Wear Behavior of Hot Extruded AA7075 - 4%TiC In Situ Metal Matrix Composite

2014 ◽  
Vol 541-542 ◽  
pp. 263-267
Author(s):  
S. Baskaran ◽  
B.M. Muthamizh Selvan ◽  
V. Anandakrishnan ◽  
R. Venkatraman ◽  
Muthukannan Durai Selvam
Keyword(s):  
Heat Treatment ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Wear Behavior ◽  
Wear Test ◽  
Wear Behaviour ◽  
Dry Sliding Wear ◽  
Casting Technique

The AA7075-4%TiC metal matrix composite produced through in-situ casting technique was hot extruded and subjected to annealing at 415°C for 150 minutes. Another set of hot extruded AA7075-4%TiC metal matrix composite was heat treated to T6 condition. Dry sliding wear test was conducted with different sliding speeds and loads for both annealed and T6 conditioned composites to compare their wear behaviour. It was observed that irrespective of the heat treatment conditions, the depth of wear, decreases with increasing sliding velocity for all the loads tested and increases with increasing load for all the sliding velocities.

scholarly journals Influence of Nanoreinforced Particles (Al2O3) on Fatigue Life and Strength of Aluminium Based Metal Matrix Composite

2017 ◽  
Vol 13 (3) ◽  
pp. 91-99 ◽  
Author(s):  
Hussain J. M Alalkawi ◽  
Aseel A. Hamdany ◽  
Abbas Ahmed Alasadi
Keyword(s):  
Fatigue Life ◽  
Fatigue Strength ◽  
Aluminium Alloy ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Stir Casting ◽  
Al2o3 Nanoparticles ◽  
Casting Technique ◽  
Nano Material

Abstract      In this investigation, Al2O3 nano material of 50nm particles size were added to the 6061 Al aluminium alloy by using the stir casting technique to fabricate the nanocomposite of 10wt% Al2O3. The experimental results observed that the addition of 10wt% Al2O3 improved the fatigue life and strength of constant and cumulative fatigue. Comparison between the S-N curves behaviour of metal matrix (AA6061) and the nanocomposite 10wt% Al2O3 has been made. The comparison revealed that 12.8% enhancement in fatigue strength at 107cycles due to 10wt% nano reinforcement. Also cumulative fatigue life of 10wt% nanocomposite was found to be increased by 33.37% and 39.58% for low-high and high-low loading sequences, respectively, compared to the metal-matrix cumulative life. Keywords: Al2O3 nanoparticles, AA6061/10wt%, constant and cumulative fatigue, MMCs.

Microstructure and mechanical testing of Al/graphite/Fly-ash metal matrix composite material

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Rajat Yadav ◽  
Shashi Prakash Dwivedi ◽  
Vijay Kumar Dwivedi ◽  
Anas Islam
Keyword(s):  
Fly Ash ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Green Revolution ◽  
Base Material ◽  
Stir Casting ◽  
Content Type ◽  
Casting Technique ◽  
Metal Matrix Composite Material

Purpose This study aims to attempt to make an aluminum-based composite using reinforcement such as graphite and fly ash. Pollution is an enhanced serious issue of concern for global. Industries play a major role in disturbing the balance of the environment system. Composite is made by using the stir casting technique. The waste that is generated by the industries if left untreated or left to be rotten at some place may prove fatal to invite various types of diseases. Proper treatment of these wastes is the need of the hour, the best way to get rid of such kinds of hazardous wastes is to use them by recycling. Design/methodology/approach Stir casting technique was used to make a composite. Graphite and fly ash were mixed with equal amounts of 2.5% to 15% in aluminum. The microstructure of composite formed after composite was noticed. After seeing the microstructure it was understood that reinforcement particles are very well-mixed in aluminum. Findings When graphite was mixed with 3.75% and 3.75% fly ash in aluminum, the strength of the composite came to about 171.12 MPa. As a result, the strength of the composite increased by about 16.10% with respect to the base material. In the same way, when 3.75% graphite and 3.75% fly ash were added to aluminum, the hardness of the composite increased by about 26.60%. Originality/value In this work, graphite and fly ash have been used to develop green metal matrix composite to support the green revolution as promoted/suggested by United Nations, thus reducing the environmental pollution. The addition of graphite and fly ash to aluminum reduced toughness. The thermal expansion of the composite has also been observed to know whether the composite made is worth using in higher temperatures.

scholarly journals Effect of Cryogenic treatment on Wear Properties of Aluminum Al356 – Zirconium Silicate Particulate Metal Matrix Composite

2021 ◽  
Vol 10 (3S) ◽  
pp. 21-24
Author(s):  
Shivanna Shivanna ◽  
Sameer S Kulkarni ◽  
Samarth C ◽  
Sagar R ◽  
Sanil K R
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Cryogenic Treatment ◽  
Stir Casting ◽  
Wear Testing ◽  
Matrix Composites ◽  
Wear Properties ◽  
Casting Technique ◽  
Pin On Disc

Metal matrix composite (MMC’s) are very much familiar in the field like automobile and aerospace industries owing to their excellent wear and mechanical properties . The fundamental aim of this paper is to augment cognizance amongst the researchers and to attract their consideration towards the present approach to treat with the cryogenic usage for the nonferrous metals. In this writing it is endeavor to deliver the examination findings of character of cryogenic usage on Wear Properties of Al356-ZrSiO4 Particulate Reinforced metal matrix Composites adapted by Stir Casting technique. The amount of reinforcement is changed from 0 to 12wt% in track of 3 %. The ready composites are exposed to wear testing as per ASTM standards using pin on disc machine .The hardness of the composites was found to augment with augment in reinforcement in the composite. The inference obtained discloses that as reinforcement content in the composites increment and execution of cryogenic usage to composite amended the wear resistance.

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