Optimization of Friction Stir Process Parameters for Micro-Hardness and Wear Characteristics of Silicon Carbide-Reinforced Al-7075 Surface Composite

2021 ◽  
Author(s):  
D. S. Chandra Mouli ◽  
R. Umamaheswara Rao
Keyword(s):  
Silicon Carbide ◽  
Process Parameters ◽  
Micro Hardness ◽  
Friction Stir Process ◽  
Wear Characteristics ◽  
Friction Stir ◽  
Surface Composite ◽  
Al 7075

scholarly journals Influence of Friction Stir Processing Parameters on Mg ZE 41-SiC Surface Composite

2019 ◽  
Vol 8 (2) ◽  
pp. 6058-6061
Keyword(s):  
Process Parameters ◽  
Tilt Angle ◽  
Friction Stir Processing ◽  
Rotational Speed ◽  
Traverse Speed ◽  
Nano Particles ◽  
Micro Hardness ◽  
Friction Stir ◽  
Surface Composite ◽  
Tool Tilt Angle

In this study, the influence of friction stir processing process parameters (FSP), such as tool rotational speed, tool traverse speed, and the tool tilt angle on the mechanical properties of Sic reinforced surface magnesium rare earth ZE41 alloy composite was studied. The process was carried at tool rotational speeds of 710, 900, 1120, 1600, 1400 and 1800 rpm, tool traverse speeds of 16, 25, 40 and 63 mm/min and tool tilt angle of degree 1. Nano-particles of SiC (40 microns) were used as reinforcements to produce a composite surface. The grain refinement of the processed specimens was analyzed using scanning electron microscope. It is observed from the results that FSP process parameters influenced the surface composite area, SiC particles distribution and micro hardness of the composite. The outcomes indicated that the higher micro hardness was obtained at rotational speed of 1100 RPM, traverse speed 40mm/min and tilt angle 10 .

scholarly journals Optimization of Friction Stir Process Parameters for Enhancement in Surface Properties of Al 7075-SiC/Gr Hybrid Surface Composites

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 830 ◽  
Author(s):  
Namdev Ashok Patil ◽  
Srinivasa Rao Pedapati ◽  
Othman Bin Mamat ◽  
Abdul Munir Hidayat Syah Lubis
Keyword(s):  
Wear Rate ◽  
Surface Properties ◽  
Base Alloy ◽  
Nano Particles ◽  
Micro Hardness ◽  
Wear Properties ◽  
Friction Stir ◽  
Surface Composites ◽  
Al 7075 ◽  
Independent Parameters

Friction stir processing (FSP) has evolved as an important technique in fabrication of metal matrix composites. The surface properties enhancement is obtainable by insertion of desired discontinuous particular reinforcements into base alloy using FSP. Despite having high specific strength, more applications of Al alloys are restricted due to their poor surface properties under various loading conditions. In this study, the main focus is on enhancing the microhardness and wear properties of Al 7075 base alloy by means of uniform dispersion of silicon carbide and graphite (SiC/Gr) nano particles into the base alloy using the FSP technique. The tool rotational speed (w: 500, 1000, 1500 rpm), tool traverse speed (v: 20, 30, 40 mm/min), reinforcement particles hybrid ratio (HR: 60:40, 75:25, 90:10) and volume percentage (vol%: 4%, 8%, 12%) are used as independent parameters. The effect of these parameters on microstructure, micro hardness and wear properties of surface composites are studied in detail. For desired wear rate and microhardness as responses, the aforementioned independent parameters are optimized using response surface methodology (RSM). The significance of factors and their interactions for maximizing hardness and minimizing wear rate and coefficient of friction (COF) were determined. Analysis of variance (ANOVA) for responses has been carried out, and the models were found to be significant in all three responses. The minimum wear rate of 0.01194 mg/m was obtained for parameters w 1500 rpm, v 40 mm/min, HR 60:40, vol% 4 (Run 10). The maximum micro hardness of 300 HV obtained for parameters w 1000 rpm, v 30 mm/min, HR 75:25, vol% 12 (Run 14). The presence and uniform distribution of SiC and Gr into the base alloy was confirmed through field-emission scanning electron microscopy (FESEM) imaging, energy-dispersive X-ray spectroscopy (EDX) and mapping tests. The wear rate and COF decreased significantly due to graphitized mechanically mixed layer developed at the sliding contacts. The microhardness of resultant composites observed to be dependent on effect of the independent parameters on extent of inherent precipitates dissolution and grain size strengthening in the resultant materials.

scholarly journals Effect of Friction Stir Process Parameters on the Mechanical and Thermal Behavior of 5754-H111 Aluminum Plates

Materials ◽  
2016 ◽  
Vol 9 (3) ◽  
pp. 122 ◽  
Author(s):  
Livia Serio ◽  
Davide Palumbo ◽  
Luigi De Filippis ◽  
Umberto Galietti ◽  
Antonio Ludovico
Keyword(s):  
Thermal Behavior ◽  
Process Parameters ◽  
Friction Stir Process ◽  
Friction Stir ◽  
Aluminum Plates

scholarly journals EFFECT OF DEPOSITION TECHNIQUES OF REINFORCEMENT DURING FABRICATION OF AL-BASED SURFACE HYBRID MATRIX METAL MATRIX COMPOSITE

2021 ◽  
Vol 12 (4) ◽  
pp. 1339-1346
Author(s):  
Kuldip Kumar Sahu, Et. al.
Keyword(s):  
Metal Matrix Composite ◽  
Metal Matrix Composites ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Reinforcement Particle ◽  
Preparation Technique ◽  
Matrix Composites ◽  
Friction Stir Process ◽  
Friction Stir ◽  
Surface Composite

Several deposition methods have been proposed for pre-deposition of reinforcement particle for preparation of surface metal matrix composite by Friction Stir Process. The method, which will effectively and homogeneously spread the reinforcement within processed zone, will be considered as best possible method.Homogeneous volumetric metal matrix composites can be fabricated by conventional casting and modified stir casting methods. Friction stir process (FSP) can be used as one of the best technique to fabricate surface modified metal matrix composites. In this research article, silicon carbide and graphite powder are used as reinforced materials and AA6061 is used as parent metal matrix material.  FSP which is a versatile surface composite preparation technique is applied for fabrication of surface composite. Herein, single channel, multi-channel and perforated holes methods have been utilized for reinforcement deposition. As per the results, perforated blind holes method is reported as best method of pre deposition of powders. Finally, array of holes for pre-deposition of reinforcement powder improves approx 25% in ultimate tensile strength , 40% in micro-hardness and appreciable grain refinement are observed in metal matrix composite processed by FSP as compared to as received alloy.

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