Fabrication of Cu Surface Composite Reinforced by Ni Particles Via Friction Stir Processing: Microstructure and Tribology Behaviors

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Mohsen Pezeshkian ◽  
Iman Ebrahimzadeh ◽  
Farhad Gharavi
Keyword(s):  
Friction Stir Processing ◽  
Traverse Speed ◽  
Optical Microscope ◽  
Wear Properties ◽  
Friction Stir ◽  
Surface Composite ◽  
Hardness Tester ◽  
Different Dimensions ◽  
Pin On Disk ◽  
Tool Rotation

In the present investigation, friction stir processing (FSP) was used to integrate Ni particles into the surface of copper in order to fabricate a surface composite. Determining an optimized percentage of Ni particles, different dimensions of grooves were machined into the Cu plates. Then, the specimens' grooves were filled by nickel reinforcement particles, and friction stir process was performed on the specimens with tool rotation speed of 800 rpm and traverse speed of 50 mm/min. Optical microscope (OM) and scanning electron microscope (SEM) were used to evaluate the microstructure. Pin-on-disk test was performed to evaluate wear properties using pins manufactured from the FSPed zone. Also, Micromet-Buehler Vickers hardness tester was used to test the FSPed surfaces' microhardness. The results show that the best properties are obtained when using 2 × 2 mm groove. In this situation, microhardness and wear properties were improved as 40% and 60% compared to the substrate, respectively.

Effect of Friction Stir Processing on Mechanical Properties of Surface Composite of Cu Reinforced with Cr Particles

2013 ◽  
Vol 829 ◽  
pp. 851-856 ◽  
Author(s):  
Bahram A. Khiyavi ◽  
Abdolhossein Jalali Aghchai ◽  
Mohammadreza Arbabtafti ◽  
Mohamad Kazem Besharati Givi ◽  
Jalal Jafari
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Processing ◽  
Metal Matrix ◽  
Wear Test ◽  
Traverse Speed ◽  
Mechanical Behaviors ◽  
Wear Properties ◽  
Friction Stir ◽  
Surface Composite ◽  
Wear Tests

The main aims of this study is to produce copper reinforced metal matrix composite (MMC) using micron sized chromium particles via friction stir processing (FSP) in order to studying effects of adding Cr particles to copper based matrix by FSP.Microstructures, microhardness and wear properties have been studied in order to evaluate the microstructures and mechanical properties of fabricated composites. the microstructure properties are evaluated by optical microscopy (OM) and field emission scanning electron microscopy (FESEM). The mechanical behaviors of the samples are determined by microhardness and wear tests. The results showed that the grain size of fabricated composite reduced. also it is indicated that in comparison to base copper microhardness of FSPed composites in stir zone (SZ) have been increased significantly. the results of wear test showed that in comparison with specimen with traverse speed of 80 mm/min , higher traverse speed of 160 mm/min increase wear rate of cylindrical pins.

Effect of Friction Stir Processing Parameters on the Properties of AA7075-T73/Al2O3 Surface Metal Matrix Composite

2020 ◽  
Vol 1002 ◽  
pp. 140-150
Author(s):  
Ali H. Al-Helli ◽  
Ahmed R. Alhamaoy ◽  
Ayad Murad Takhakh
Keyword(s):  
Friction Stir Processing ◽  
Particle Distribution ◽  
Surface Hardness ◽  
Base Material ◽  
Processing Parameters ◽  
Optical Microscope ◽  
Friction Stir ◽  
Surface Composite ◽  
Surface Metal ◽  
Number Of Passes

Friction Stir Processing (FSP) technology was wielded to output the Al7075/ Al2O3 surface composite. The effects parameters of processing method on particle distribution have been studied. The microstructure and mechanical characteristics of the samples were examined using the optical microscope, SEM and hardness examination. Acquired consequences, showed that Al2O3 particles were in a good interior distribution inside the basement. This technique produced excellent bonding between the surface composite and the base material. On other hand the surface hardness was increased about 25% as compared with the substrate. In addition, grain matrix refinement and enhanced particle distribution were obtained after each FSP pass. Also the dispersion of Al2O3 particles in the stirred area became more homogeneous and the average hardness improved by increasing the number of passes.

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.

WEAR ANALYSIS OF ALUMINUM–NICKEL INTERMETALLIC SURFACE COMPOSITE FABRICATED BY FRICTION STIR PROCESSING

2020 ◽  
pp. 2050057
Author(s):  
MORTEZA SHAMANIAN ◽  
MOHAMMAD REZA NASRESFAHANI ◽  
EBRAHIM BAHRAMI ◽  
HOSSEIN EDRIS
Keyword(s):  
Wear Resistance ◽  
Friction Stir Processing ◽  
Traverse Speed ◽  
Friction Stir ◽  
Surface Composite ◽  
Wear Analysis ◽  
2024 Alloy ◽  
Ni Powder ◽  
The Matrix ◽  
Stable Stage

In low-strength metals, the main purpose of enhancing surface properties is to increase the abrasion resistance. One of the new methods for improving the microstructure of the surface layer of metals is the surface composite. In this research, the friction stir processing (FSP) was used to develop an aluminum–nickel intermetallic surface composite. Aluminum 2024 alloy and Ni powder were used as the matrix and reinforcement agent, respectively. Comparison of composite and non-composite FSP samples indicates that adding reinforcements improves the wear resistance of a monolithic metal in all condition. Also, the wear resistance of fabricated composites using activated Al–Ni powder is higher than the others due to the presence of Al3Ni2 and Al3Ni intermetallic compounds. At low traverse speed of the FSP, powder agglomeration occurs, and the powders are not uniformly distributed, as a result, the friction coefficient rises. SEM micrographs of scratched particles of activated composite confirm the delamination mechanism in the wear stable stage.

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 .

Microstructure and Mechanical Properties of Al/AlN Surface Composite Fabricated via Multi-Pass Friction Stir Processing

2014 ◽  
Vol 490-491 ◽  
pp. 192-197 ◽  
Author(s):  
Min Yang ◽  
Chao Qun Song ◽  
Xiu Zhong Liu ◽  
Cang Long Cai
Keyword(s):  
Friction Stir Processing ◽  
Optical Microscope ◽  
Rolled Plate ◽  
Loss Reduction ◽  
Friction Stir ◽  
Surface Composite ◽  
Wear Weight Loss ◽  
Reinforced Composite ◽  
Resistance To Wear ◽  
Composite Region

The AlN particles reinforced composite was fabricated on the surface of aluminum 6061-T6 alloy rolled plate by five passes friction stir processing (FSP). Microstructure of FSPed sample was characterized by optical microscope and scanning electron microscope. AlN particles in composite were verified by EDS and XRD. Microhardness and resistance to wear were also investigated. Results show that grains in composite were refined by dynamic recrystallization and uniformly dispersed AlN particles. Composite region bonded with the Al substrate well. No reaction occurred at the interface between AlN and Al matrix. By comparison with base metal, the FSP-produced composite exhibited improved microhardness and substantial wear weight loss reduction.

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