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Technical Paper

Assessment of the Metallurgical and Mechanical Properties of Stir cum Squeeze Cast A356 with 5wt. % SiC and x wt. % Flyash Hybrid Composites

2020-09-25
2020-28-0397
The forged connecting rod and pin experience a large amount of stresses due to cyclic load for a long period of time induced by the reciprocating movement of the piston. The proposed work focused to produce lightweight composites with high strength using waste flyash and simple manufacturing process. In this context, the proposed experimental work was formulated to develop aluminium alloy hybrid metal matrix composite of A356 alloy with silicon carbide and flyash processed through stir cum squeeze casting process under optimal parametric condition. The samples were subjected to varying flyash content of 0, 5, 10wt.% and SiC of 5wt.% kept constant. Responses like metallography, hardness, impact strength, flexural strength, fatigue strength were observed for the manufactured hybrid composites. There was a significant improvement in the properties with a higher weight percentage addition of 10wt.% flyash and 5wt.% SiC with A356 hybrid composites.
Technical Paper

Unraveling the Mechanical Behavior of AA 7075 - WC Nanocomposites Developed through FSP Route

2020-09-25
2020-28-0404
Friction Stir Processing (FSP) is a solid-state processing approach that alters and enhances the properties of the matrix material. The prime objective of this research work was aluminium alloy 7075-T6 which has zinc as key alloying element next to aluminium and other alloying elements is reinforced by varying 0, 3, 6 and 9 wt.% tungsten carbide nanoparticles by FSP route. During experimentation, the FSP processing parameters like tool speed, traverse speed, axial load, and tool were being kept constant with four passes of processing. The test samples were prepared and tested as per standard procedures like hardness, ultimate tensile strength, impact strength and average values were recorded. Also, fracture surface morphology was studied.
Technical Paper

Experimental Studies on Weldability of Oil Hardening Non Shrinking Die Steel

2020-09-25
2020-28-0424
The Oil Hardening Non Shrinking (OHNS) die steel refers to a variety of carbon and alloy steels that are particularly well-suited for making tools. Though these steels are weldable, there is risk of crack formation. But, this can be avoided with convinced specifications like pre heating, proper choice of electrode etc., In the present work, OHNS die steel is welded with three different electrodes. The chosen electrodes were mild steel electrode, E312-16 chromium based electrode and E-NiCrFe-3 nickel based electrode. The OHNS steel is welded with these three electrodes and the welded specimens were examined for hot cracking tendency and mechanical properties of the joint. The hot cracking tendency was assessed by Houldcroft’s weldability test (Fishbone test). All the three electrodes proved the good results in terms of hot crack resistance and the specimen welded with E312-16 chromium based electrode provides good mechanical properties.
Technical Paper

Investigation of Hybrid Polyamide Composites for Replacement of Metallic Parts

2020-09-25
2020-28-0423
Over the past few decades, the world is looking for a better replacement option for metals. Polymers with reinforcements are finding their way deep inside in most of the engineering applications because of its lightweight and superior properties. The aim of this study is to investigate hybrid polymer composite polyphthalamide (PPA) reinforced with glass fiber and Poly tetra fluro ethylene. The reinforcement was varied as 10, 20, 30wt. % of Glass Fibre, while the fixed quantity of Poly Tetra Fluro Ethylene (PTFE) as 5wt. % was taken for hybrid composites preparation. The virgin and hybrid composite specimen were prepared under optimal process parametric conditions through the use of injection moulding techniques and test samples were produced as per ASTM standards. The response of physical properties such as density and various Mechanical testing like Hardness, Tensile Strength, and impact strength were carried out and noted.
Technical Paper

Design and Analysis of Air Compressor Intake Valve Body Casing by Metallic Material and Hybrid Polyamide Composite

2020-09-25
2020-28-0377
An industrial air compressor is finding a wide range of usage in manufacturing and assembly areas. The intake valve body is one of the major parts in the industrial air compressor which serves numerous functions like regulating the amount of air into the compressor for pressurizing and prevents the backflow of oil. The main intern of our proposed work is to design and conduct Finite Element Analysis (FEA) in air intake valve body casing part with commercially used metallic material of LM6 aluminium alloy and proposed hybrid polymer composite. The proposed polymer material Polyphthalamide (PPA) reinforced with 30wt% glass fiber and 5% Poly tetra fluro ethylene (PTFE) hybrid composites were prepared through the injection moulding route and the obtained tested responses were taken as input data for the further analysis.
Technical Paper

Investigation of Dry Sliding Wear Behavior of AA8011 Reinforced with Zirconium Oxide and Aluminium Oxide Hybrid Composites Processed through Multi-Direction Forging

2019-10-11
2019-28-0057
The Cardinal goal of this research work is to fabricate hybrid composites of AA8011 with reinforcement particles of Zr2O3 and Al2O3 which was taken in equal (5wt%) weight percentage. The hybrid composites were cast in a square shape (50x50x50 mm size) under the optimal stir casted process parametric condition, further, it was taken for the forging process. The prepared specimens were induced for uni-direction (x), bi-direction (x and y) and multi-direction (x,y, and z) forging route and the response of microhardness of 53, 68, 81 and 96 VHN were obtained respectively due to microstructural phase changes with an even distribution of particles in the matrix. Thus, the tribological properties of prepared specimens were tested using pin-on-disc Tribometer at room temperature under dry sliding condition of load 5,10,15,20 N and by adjusting the sliding speed as 266 and 531 rpm respectively.
Technical Paper

Appraisal of Tribo Meter Study on 20MnCr5 Alloy Steel under Case Hardened and Shot Peened Condition

2019-10-11
2019-28-0098
This research is limited to study the strength and wear resistance of 20MnCr5 (SAE 5120) alloy steel under monolithic, case hardened and case hardened with shot peening processing condition. Improve the hardness of the material by enhancing the core and surface strength of case hardened with the shot peened sample. The main objective of this proposed work is to conduct the tribometer test by varying the load of 10, 20, 30 and 40N and sliding speed of 193, 386 rpm respectively on wear rate and coefficient of friction be calculated and recorded for this study. Less wear rate and nominal coefficient of friction were observed for case hardened with the shot peened sample. Load increases wear rate increases and the coefficient of friction decreases when sliding distance increases wear rate decreases and the coefficient of friction increases for all the tested samples due to oxide layer formation.
Technical Paper

Critical Wear Assessment of AA8011/Hybrid Metal Matrix Composites with Surface Amendment Using Friction Stir Process

2019-10-11
2019-28-0096
Friction Stir Process (FSP) was employed for surface modification of steel, titanium, aluminum and magnesium-based alloy has been significantly revised through the last decade. Friction Stir Process can improve surface properties such as hardness, abrasion resistance, ductility, strength, fatigue life, corrosion resistance and formability without upsetting the bulk properties of the material. The aluminum alloy having low ductility and softness characteristics are restricted because of their poor tribological properties. Preliminary studies reveal that, an ideal circumstance is to improve the aluminum alloy material life cycles by the way of strengthening the surface layer which can be modified through reinforcing nanoparticles through FSP. The main objective of the study is to improve the surface properties of AA8011 by adding nanoparticles such as SMA and silicon nitrate (Si3N4) through friction stir process.
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