Dry Sliding Tribological Behavior of Al7010/B4C/BN Hybrid Metal Matrix Nanocomposites Prepared by Ultrasonic-Assisted Stir Casting (original) (raw)
Related papers
2020
The composite materials having various different properties and behavior based on the various properties. Because of this properties composite materials are replacing the traditional materials because of their remarkable and unachievable properties, the various types of metal matrix addition of nanoparticles producing a new property in material and alloy world. All the composite materials showing good result. The nano addition effect of metal matrix on tribological properties is to be used in automotive, industrial and various applications in industry and other sector. The current situation will investigate the wear and sliding behavior of an Aluminium alloy Al.6061-which is applied on hybrid metal matrix composites(HMMCs) reinforced with B4C ceramic nanoparticles. Present study will be focused on tribological properties of Al.6061-B4C nano composite and also comparison with Al.6061 alone. The proposed of Al.6061-B4C nano composites are to be fabricated by stir casting method with pure, 0.5%, 1% volume fraction of B4C nano particles and pin of 10X30 mm diameter and height are to be cut. The wear tests are to be with varying parameters getting by with the help of Pin on Disc wear testing setup. From the proposed results effect of various test parameters on wear behavior of pure Aluminium 6061 matrix alloy and nano B4C reinforced aluminium metal matrix composites are to be studied. After with the help of Taguchi's technique we were got the results. Results are tabulated with the help in Minitab-16 software. To analyses and getting various results, effect and condition of every input parameter on the wear rate and friction with the help of Minitab-16 Software.
IRJET, 2020
The composite materials having various different properties and behavior based on the various properties. Because of this properties composite materials are replacing the traditional materials because of their remarkable and unachievable properties, the various types of metal matrix addition of nanoparticles producing a new property in material and alloy world. All the composite materials showing good result. The nano addition effect of metal matrix on tribological properties is to be used in automotive, industrial and various applications in industry and other sector. The current situation will investigate the wear and sliding behavior of an Aluminium alloy Al.6061-which is applied on hybrid metal matrix composites(HMMCs) reinforced with B4C ceramic nanoparticles. Present study will be focused on tribological properties of Al.6061-B4C nano composite and also comparison with Al.6061 alone. The proposed of Al.6061-B4C nano composites are to be fabricated by stir casting method with pure, 0.5%, 1% volume fraction of B4C nano particles and pin of 10X30 mm diameter and height are to be cut. The wear tests are to be with varying parameters getting by with the help of Pin on Disc wear testing setup. From the proposed results effect of various test parameters on wear behavior of pure Aluminium 6061 matrix alloy and nano B4C reinforced aluminium metal matrix composites are to be studied. After with the help of Taguchi's technique we were got the results. Results are tabulated with the help in Minitab-16 software. To analyses and getting various results, effect and condition of every input parameter on the wear rate and friction with the help of Minitab-16 Software.
Study on Dry Sliding Wear and Friction Behaviour of Al7068/Si3N4/BN Hybrid Composites
Materials
Hybrid aluminium metal matrix composites have the potential to replace single reinforced aluminium metal matrix composites due to improved properties. Moreover, tribological performance is critical for these composites, as they have extensive application areas, such as the automotive, aerospace, marine and defence industries. The present work aims to establish the tribological characteristics of Al7068/Si3N4/BN hybrid metal matrix composites prepared by stir casting route and studied using a pin-on-disc apparatus under dry sliding conditions. The hybrid composite samples were prepared at various weight percentages (0, 5, 10) of Si3N4 and BN particles. To investigate the tribological performance of the prepared composites, the wear experiments were conducted by varying the load (20, 40 and 60 N), sliding velocity (1.5, 2.5 and 3.5 m/s) and sliding distance (500, 1000 and 1500 m). Wear experimental runs were carried out based on the plan of experiments proposed by Taguchi. The minimum...
Advances in Materials Science and Engineering
The current paper aims to study wear behaviour of AA7075 reinforced with different weight percentage of nano-TiC and graphite particles under dry sliding condition. TiC particles are taken in different weight percentages (5%, 10%, and 15%), and graphite was chosen as (3%, 4%, and 5%) along with three different levels of sliding speed, applied load, and sliding velocity. The fabrication was conducted using stir casting equipment, and the experiments were done using Taguchi’s L27 orthogonal array. The Taguchi and ANOVA results applied load and percentage of TiC are the most influencing parameters which influences wear loss and friction coefficient
Dry sliding friction and wear behavior of Al7075/TiC/Si3N4 hybrid metal matrix composites
THE 8TH ANNUAL INTERNATIONAL SEMINAR ON TRENDS IN SCIENCE AND SCIENCE EDUCATION (AISTSSE) 2021
The aluminum-based composites discovers its applications broadly in various industries which include aviation, transport, automobile and marine attributing to their enhanced mechanical properties like hardness, density, strength and resistance in wear. The present exploration work centers around the production of aluminum (Al7075) matrix composites reinforced with different weight percentages of titanium carbide (TiC) and silicon nitride (Si3N4) particles by traditional stir casting technique. The reinforcements are added by varying the weight percentages from 0 to 10 in multiples of 2%. The cast components are tested for density and hardness. Unidirectional wear testing was done for the fabricated composites under various stacking condition (10 N, 20 N and 30 N of load) at a steady speed of 800 rpm and time for 10 min. SEM analysis was done on worn surfaces. The hardness of hybrid metal matrix composites [HMMC] increased as the weight % of reinforcement in the HMMC increased. The wear characteristics are obtained using a pin on disc apparatus. The inclusion of TiC and Si3N4 particles increased wear resistance. In terms of basic wear rate, the COF is seen to increase and decrease in the specific wear rate.
IMPROVING THE PROPERTY OF WEAR RATE AND HARDNESS BY ADDING HYBRID NANOMATERIALS TO AA7075
Eastern-European Journal of Enterprise Technologies, 2022
Aluminum alloys have become an essential material in many modern applications, such as automobiles, marines and aviation industries. It is expected that more applications will heavily depend on aluminum alloys to reduce the weight and maintain safety standards, many previous studies have done in this regard. Numerous of these applications’ parts could be subjected to different loading and environmental conditions. This includes wearing stress and loss of the surface properties. To address these issues, intensive researches have been conducted aiming to improve aluminum wear resistance. However, there is an increasing demand to provide a comprehensive understanding of the mechanisms of enhancing wear resistance. Preparation of Nano-materials combined with aluminum alloy can be made in several known metallurgical methods. One of the most important difficulties and challenges faced in the manufacture of these nanomaterials is to obtain a homogeneous mixture that does not have manufacturing defects. The present work aims to process and evaluate the Nano-hybrid composites of with different ratios of (Cu+Ti) mixed with AA7075 by using the liquid stir casting method by using (pin-on disc) wear testing apparatus. The results showed when using multiple speeds and different loads in practical experiments, that the volumetric wear loss increase from 2.8 mm3 to 29.89 mm3 for zero–Nano and from 0.889 mm3 to 3.09 mm3 for 0.8 %+0.3 % (Cu+Ti) composite at speed 100 to 300 respectively. And from 12.81 mm3 to 0.889 mm3 at 25 N. The coefficient of friction is reduced with the addition of reinforced material at 0.8 %+0.3 % (Cu+Ti) composite from 0.172 to 0.05. The hardness (BH) of the prepared composites increases with increasing the amount of hybrid Nano–reinforced materials. The enhancement percentage of 25.4 % is attained compared to the matrix material. These additions, which were in certain proportions, improved the mechanical properties.
Advanced Composites Letters
Aluminum (Al)-based composites are on increasing usage in sectors like ground transportation, aerospace, sports, and infrastructure because of the improved properties such as high strength to weight ratio, corrosion, fatigue, and wear resistance. Several applications involving dynamic contact stresses require excellent wear and frictional performance for improved life. Nanocomposites are found to perform exceedingly better than microcomposites and alloys in several lab scale tribological investigations carried out so far in the last decade. In this article, an attempt is made to review those published reports about dry sliding tribological behavior of particulate-reinforced Al nanocomposites. Wear and friction being system properties are found to get influenced by intrinsic factors such as reinforcement, fabrication method, microstructure; extrinsic parameters like load, speed, contact conditions and the system generated in situ tribolayer all being interrelated.
Mechanical and Tribological Properties of Aluminum Based Metal Matrix Nanocomposites
Encyclopedia of Materials: Composites, 2021
The present study investigates the relative density, mechanical and tribological properties of 3 mol% yttria-stabilized zirconia composites reinforced with 10 vol% of alumna through both conventional sintering and microwave sintering (CS and MW). The variations in mechanical and tribological properties were correlated to the corresponding microstructures. Wear tests were carried out on the composite samples against EN30 grade stainless steel disk with 320-grade emery paper for a sliding distance of 1500 m under dry sliding condition. Wear rate and coefficient of friction of the developed composite were evaluated with varying normal loads in the range of 20-200 N with corresponding sliding velocities of 0.79 m/ s, 1.4 m/s, 1.8 m/s and 2.4 m/s, respectively. The maximum value of wear rate and COF of the MW samples were 51.21% and 24.59%, respectively, which were lower compared to that of CS.
Dry sliding wear studies of aluminum matrix hybrid composites
In the present work, hybrid composites are fabricated with self-lubricating characteristics to make them as resource-efficient materials. AA6061-10 wt. % B4C–MoS2 hybrid composites reinforced with 2.5, 5 and 7.5 wt. % concentration of MoS2 particles are produced using stir casting technique, and mechanical and tribological properties are evaluated. Microstructural characterization of the hybrid composites revealed the uniform distribution of reinforcement (B4C and MoS2) particles in the matrix material. Hardness and fracture toughness of the hybrid composites are decreased monotonously with an increase in the addition of MoS2 particles. Dry sliding tribological studies conducted using a pin-on-disk tribotester under atmospheric conditions revealed the formation of MoS2-lubricated tribolayer on the worn pin surface which significantly influenced the tribological properties. The addition of MoS2 particles decreased the friction coefficient and wear rate of the hybrid composites. Delamination and abrasion are observed to be the controlling wear mechanisms and material in the form of platelet-shaped debris, and flow-type chip debris is formed, and a long and shallow crater on the worn pin surface of the hybrid composite is also observed.
Journal of Nanomaterials
The aluminum metal matrix composites were broadly exploited in the applications of automotive, aerospace, and other defense with functionally graded materials-related application. Above applications definitely required excellent mechanical characteristics. Therefore, in this way, the major attempt was made on the nano-based composites with aluminum alloy utilization. In this research, aluminum alloy AA8011 and the ceramic-based reinforcement particles of nano boron carbide (B4C) were selected for producing the metal matrix composites by the liquefying process or stir casting route. The weight percentage of nano boron carbide particles having 15 wt% was subjected to add into the aluminum alloy during the stir casting process. Then, processed nano boron carbide and AA8011 specimens were prepared to conduct tribological behaviors with various processing conditions like sliding velocity, setting wear temperature, and applied load by the tribometer setup. The scanning electron microscope...