scholarly journals The Role of Friction Stir Processing (FSP) Parameters on TiC Reinforced Surface Al7075-T651 Aluminum Alloy

2016 ◽  
Vol 21 (4) ◽  
pp. 508-516 ◽  
Author(s):  
Felipe García-Vázquez ◽  
Benjamín Vargas-Arista ◽  
Rodrigo Muñiz ◽  
Juan Carlos Ortiz ◽  
Héctor Hernández García ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Friction Stir Processing ◽  
Weight Ratio ◽  
Nano Particles ◽  
Friction Stir ◽  
Surface Composite ◽  
Surface Composites ◽  
Structural Applications ◽  
Composite Distribution

Abstract: Aluminum alloys are very promising for structural applications in aerospace, military and transportation industries due to their light weight, high strength-to-weight ratio and excellent resistance to corrosion. In comparison to unreinforced aluminum alloys, aluminum/aluminum alloy matrix composites reinforced with ceramic phases exhibit higher strength and hardness, improved tribological characteristics. A novel surface modifying technique, friction stir processing (FSP), has been developed for fabrication of surface composite with an improved performance. The effect of FSP parameters such as number of passes, direction of each pass, sealed or unsealed groove on microstructure was investigated. In this work, nano-particles of TiC (2% in weight) were added to aluminum alloy AA7075-T651 to produce a functional surface. Fixed parameters for this AA7075 alloy were used; rotation speed of 1000 rpm, travel speed of 300 mm/min and pin penetration of 2.8 mm. Optical microscopy (OM), scanning electron microscopy (SEM) and atomic force microscopy (AFM) were employed to study the microstructure of the fabricated surface composites. The results indicated that the selected FSP parameters influenced the area of surface composite, distribution of TiC particles and micro-hardness of the surface composites. Finally, in order to evaluate rate wear the pin on disk test was carried out.

Fabrication of Hybrid Surface Composites AA6061/(B4C + MoS2) via Friction Stir Processing

2019 ◽  
Vol 141 (5) ◽  
Author(s):  
Daulat Kumar Sharma ◽  
Vivek Patel ◽  
Vishvesh Badheka ◽  
Krunal Mehta ◽  
Gautam Upadhyay
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloys ◽  
Friction Stir Processing ◽  
Solid Lubricant ◽  
Hybrid Composites ◽  
Aluminum Matrix ◽  
Friction Stir ◽  
Surface Composite ◽  
Surface Composites ◽  
Structural Applications

Poor tribological properties restrict structural applications of aluminum alloys and surface composites of aluminum alloys have gained more attention in material processing. The addition of solid lubricant reinforcement particles along with abrasive ceramics contributes to the enhancement of tribological performance of surface composites. In the present study, the solid-state technique, friction stir processing (FSP) was used to develop mono (B4C) and hybrid (B4C + MoS2) surface composites in the AA6061-T651 aluminum alloy. The hybrid surface composites were produced by varying an amount of MoS2. Multipass FSP with different direction strategies was adopted for achieving uniform distribution of reinforcement powders in the aluminum matrix. Microstructure analysis showed a uniform dispersal of reinforcement particles without any clustering or agglomeration in the processing zone. Microhardness and wear performance of mono and hybrid composites improved in comparison with the base metal. The mono surface composite exhibited the highest hardness while the hybrid surface composite (75%B4C + 25%MoS2) achieved the highest wear resistance. This was attributed to the solid lubricant nature of MoS2. Furthermore, dissolution of the strengthening precipitate condition during multipass FSP without reinforcement particles resulted in the reduction of hardness and wear resistance.

scholarly journals Surface Composite Fabrication by Friction Stir Processing: A Review

2021 ◽  
Vol 309 ◽  
pp. 01150
Author(s):  
Anubhav Sharma ◽  
Sachin Maheshwari ◽  
Pradeep Khanna
Keyword(s):  
Process Parameters ◽  
Friction Stir Processing ◽  
Weight Ratio ◽  
Tool Geometry ◽  
Material Surface ◽  
Surface Processing ◽  
Friction Stir ◽  
Surface Composite ◽  
Composite Fabrication ◽  
Surface Composites

Newer materials with unique properties are needed to cater the ever-increasing industrial demands to meet new challenges concerning technological advancements. Quest for special materials and processes is prevalent as conventional materials fail to level up. Composite materials promisingly bridge this gap by providing controllable properties at reasonable costs. Their scope of application can further be drastically enhanced by subjecting them to special surface processing treatments. Friction stir processing (FSP) is one such promising process that can meet the stringent applicational demands. Composites are increasingly being used in industries for properties like high strength to weight ratio, increased hardness, stiffness, ductility, corrosion resistance, etc. FSP, a solid-state material modification technique, has proved its caliber in surface composite fabrication. Some attention-seeking advantages of FSP include peerless efficiency, less tool wear rate, and ability to modify material locally are some of many attention-seeking advantages. Despite being cost-effective FSP also manages to eliminate the drawbacks of the conventional manufacturing process. FSP reinforces a special material into the parent material surface to attain specific properties. Properties so developed depend on parameters like: tool geometry, traverse speed, rotation speed, number of passes etc. The present paper aims to review comprehensive information on fabrication of surface composites by FSP, process parameters, properties, industrial applications, and future scope. Key Words: Friction stir processing surface processing treatments surface composites material modification process parameters.

Effect of Tool Rotational Speed on Microstructure and Microhardness of AA6082/TiC Surface Composites using Friction Stir Processing

2014 ◽  
Vol 592-594 ◽  
pp. 234-239 ◽  
Author(s):  
A. Thangarasu ◽  
N. Murugan ◽  
I. Dinaharan ◽  
S.J. Vijay
Keyword(s):  
Friction Stir Processing ◽  
Rotational Speed ◽  
Traverse Speed ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Surface Composite ◽  
Surface Composites ◽  
Homogenous Distribution ◽  
Tool Pin ◽  
Scanning Electron

Friction stir processing (FSP) is as a novel modifying technique to synthesize surface composites. An attempt has been made to synthesis AA6082/TiC surface composite using FSP and to analyze the effect of tool rotational speed on microstructure and microhardness of the same. The tool rotational speed was varied from 800 rpm to 1600 rpm in steps of 400 rpm. The traverse speed, axial force, groove width and tool pin profile were kept constant. Scanning electron microscopy was employed to study the microstructure of the fabricated surface composites. The results indicated that the tool rotational speed significantly influenced the area of the surface composite and distribution of TiC particles. Higher rotational speed provided homogenous distribution of TiC particles while lower rotational speed caused poor distribution of TiC particles in the surface composite. The effect of the tool rotational speed on microhardness is also reported in this paper.

Effects of Various Cooling Techniques on Grain Refinement of Aluminum 7075-T651 During Friction Stir Processing

2016 ◽  
Author(s):  
Vivek V. Patel ◽  
Vishvesh J. Badheka ◽  
Samarth R. Zala ◽  
Sagar R. Patel ◽  
Utsav D. Patel ◽  
...  
Keyword(s):  
Grain Size ◽  
Friction Stir Processing ◽  
Weight Ratio ◽  
Optical Microscope ◽  
Process Temperature ◽  
Friction Stir ◽  
Fine Grain ◽  
State Process ◽  
Structural Applications ◽  
Aluminum 7075

Aluminum 7075 alloy (AA 7075) is one of the prime materials used in the aviation and automotive industry because of its high strength to weight ratio, good amount of fatigue strength and high machinability. Friction stir processing (FSP) is one of the emerging solid state process that refines the microstructure and hence improved mechanical properties are obtained. The process temperature during FSP affects the resulting microstructure so the attempt for reducing the process temperature can result into reduction in the grain size. The fine grain size microstructure delivers high percentage of elongation which reduces the number of joints and welds in the critical structural applications. So, by implementing coolants such as water and carbon dioxide (CO2) during this process had hindered the grain growth and very fine grained microstructure was obtained. The fine grain microstructure offers higher elongation and hardness as deformation starts from the grain boundaries. In this experimental investigation we intended to keep the temperature generation during the process as low as possible by keeping the process parameters of 765 rpm, 31.5 mm/min fees rate and 20 tilt of the tool (optimized for tapered threaded cylindrical pin tool) constant. All the samples were examined by metallographic characterization using optical microscope. The grain size measurements for all three FSP samples were carried out. Water and CO2 cooled FSP samples reported much more fine grain as compared to naturally cooled sample because of the less heat input during the process.

scholarly journals EFFECT OF FRICTION STIR PROCESSING PARAMETERS ON THE TENSILE STRENGTH OF SURFACE COMPOSITE ALUMINUM ALLOY.

2017 ◽  
Vol 5 (1) ◽  
pp. 2061-2065 ◽  
Author(s):  
Essam Moustafa ◽  
◽  
Samah Mohammed ◽  
Sayed Abdel-Wanis ◽  
Tamer Mahmoud ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Friction Stir Processing ◽  
Processing Parameters ◽  
Friction Stir ◽  
Surface Composite

scholarly journals Characterization of AZ31-NbC surface composite fabricated by friction stir processing

2020 ◽  
Vol 64 (1) ◽  
pp. 29-37
Author(s):  
M. Muralimanokar ◽  
Vignesh R. Vaira ◽  
R. Padmanaban ◽  
Priyadharshini G. Suganya
Keyword(s):  
Wear Rate ◽  
Corrosion Rate ◽  
Friction Stir Processing ◽  
Niobium Carbide ◽  
Weight Ratio ◽  
Base Material ◽  
Az31 Alloy ◽  
Corrosion Mechanism ◽  
Friction Stir ◽  
Surface Composite

AbstractAZ31D magnesium alloy is widely used in automotive, aircraft, and aerospace applications because of its high strength to weight ratio. However, the softness of the alloy results in higher wear rate and the high activity results in higher corrosion rate. With an aim of reducing the wear rate and corrosion rate of AZ31 alloy, surface composite of AZ31 alloy is fabricated by reinforcing niobium carbide (NbC) by friction stir processing. The microstructure and dispersion of the reinforcements in AZ31-NbC surface composite is analysed by optical microscopy. In addition, the microhardness and tribological characteristics of the developed AZ31-NbC surface composite are investigated. The results demonstrated an increase in microhardness (23.2 %) and the decrease in wear rate (15.6 % for a normal load of 2 kg) in the developed AZ31-NbC surface composite with respect to the base material. The immersion corrosion test was performed to analyse the corrosion rate of the developed AZ31-NbC surface composite in simulated sea water environment (3.5 wt % NaCl solution). The results indicate that the corrosion rate of the developed AZ31-NbC surface composite is higher than that of base material. A comprehensive analysis on the wear and corrosion mechanism of the developed AZ31-NbC surface composite is presented.

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 .

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