Metallurgical, mechanical and tribological behavior of Reinforced magnesium-based composite developed Via Friction stir processing

2021 ◽  
pp. 095440892110630
Author(s):  
Prem Sagar ◽  
Amit Handa ◽  
Gitesh Kumar
Keyword(s):  
Friction Stir Processing ◽  
Rotational Speed ◽  
Tribological Behavior ◽  
Secondary Phase ◽  
Tool Rotational Speed ◽  
Metal Matrix Nanocomposites ◽  
Friction Stir ◽  
Base Matrix ◽  
Matrix Nanocomposites ◽  
High Plastic

Reinforced magnesium metal matrix nanocomposites (MMMNCs) have piqued the interest of scientific community in recent years. Friction stir processing (FSP) is a known process to achieve the highest level of secondary phase nanocomposites distribution in the base monolithic matrix. In this study, an attempt has been made to synthesize magnesium base AZ61A/n-TiC nanocomposites using FSP and the influence of tool rotational speed on the metallurgical, mechanical, and tribological behavior of the developed composites has been studied. Microstructural examination shows that as tool rotational speed increases, high plastic deformation occurs and heat is generated along with the concomitant shattering impact of rotation, which consequently develops larger grains in the stir zone. However, this also provides thrusts resulting in uniform distribution of the nanoparticles in the base matrix. Microhardness and ultimate tensile strength of the developed nanocomposite were found to be significantly improved when contrasted with the base metal. Lower wear rate was observed for the composite developed at 800 rpm along with the abrasive type of wear mechanism.

Role of tool rotational speed on the tribological characteristics of magnesium based AZ61A/TiC composite developed via friction stir processing route

2020 ◽  
Vol 2 (101) ◽  
pp. 60-75
Author(s):  
P. Sagar ◽  
A. Handa
Keyword(s):  
Friction Stir Processing ◽  
Rotational Speed ◽  
Research Work ◽  
Wear Behaviour ◽  
Processing Route ◽  
Tool Rotational Speed ◽  
Tribological Behaviour ◽  
Friction Stir ◽  
Mechanism Research

Purpose: A new composite material was prepared and Different properties such as hardness and tribological behaviour of the fabricated metal matrix composite (MMC) was investigated and compared with the base AZ61A magnesium alloy. Design/methodology/approach: For the current research work, state-of-the-art technology, Friction stir processing (FSP) was performed to develop magnesium based AZ61A/TiC composite at optimized set of machine parameters. Findings: Increasing tool rotational speed ultimately leads in enhanced hardness, which further gives superior tribological properties as compared to base AZ61A alloy. Wear observations suggests a combination of abrasive and adhesive wear mechanism. Research limitations/implications: More microstructural and mechanical properties can be examined. Practical implications: The idea behind selecting AZ61A is mainly due to its increasing use in bicycle pedals and military equipment’s where at certain places it needs to encounter friction. In this current work, microhardness study and wear behaviour of AZ61A/TiC composite processed via FSP were examined. Originality/value: Paper is completely new and no work has been done till date considering this material and preparing composite with nanoparticles TiC.

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.

Effect of Nanoreinforcement on Fabrication of Al/Al2O3 Surface Composite by Friction Stir Processing

2015 ◽  
Vol 830-831 ◽  
pp. 467-471 ◽  
Author(s):  
P. Naresh ◽  
Adepu Kumar
Keyword(s):  
Friction Stir Processing ◽  
Energy Dispersive Spectroscopy ◽  
Rotational Speed ◽  
Traverse Speed ◽  
Stir Zone ◽  
Energy Dispersive ◽  
Tool Rotational Speed ◽  
Spectroscopy Analysis ◽  
Friction Stir ◽  
Microstructural Evaluation

In this investigation, the effect of nanoreinforcement particles such as Al2O3, tool rotational speed and traverse speed on microstructure and mechanical properties of Al/Al2O3surface nanocomposites fabricated by friction stir processing was studied. The surface nanocomposites were produced by varying volume percentage of nanoreinforcement, tool rotational speed and traverse speed to attain the best outcome. The fabricated composites were characterized through microstructural evaluation, microhardness measurements and energy dispersive spectroscopy analysis. Microstructural evaluation of the composites revealed that the composites were produced finer grain structure in this stir zone and it is evident for, a dynamic recrystallization was taken place. Higher hardness values were found at the stir zone of the entire composite because of the equiaxed and well dispersion of reinforced particles. The energy dispersive spectroscopy analysis revealed the presence of various elements at the stir zone. A defect free parameter setting for friction stir processing of Al/Al2O3was obtained at 1120 rpm and 16 mm/min.

Microstructural Modification of Non-Combustible Magnesium Alloy by Friction Stir Processing

2016 ◽  
Vol 880 ◽  
pp. 25-28 ◽  
Author(s):  
Angga Afrinaldi ◽  
Yoshihiko Uematsu ◽  
Toshifumi Kakiuchi ◽  
Ren Itoh
Keyword(s):  
Magnesium Alloy ◽  
Dynamic Recrystallization ◽  
Intermetallic Compounds ◽  
Grain Refinement ◽  
Friction Stir Processing ◽  
Rotational Speed ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
The Matrix ◽  
Traveling Speed

The microstructure of non-combustible magnesium alloy, AMX602, was modified by friction stir processing (FSP) at the tool rotational speed of 800 rpm and traveling speed of 300 mm/min. In the microstructure of the as-extruded material, some intermetallic compounds (IMCs), Al2Ca and Al-Mn, inhomogeneously distributed in the matrix. The inhomogeneity was dependent on the extruding condition. The largest size of IMCs was a few tens microns. By FSP, large IMCs were broken up, and fine IMCs were uniformly dispersed in the matrix. Furthermore, grain refinement occurred due to dynamic recrystallization.

Elucidation of the role of rotation speed and stirring direction on AA 7075-B4C surface composites formulated by friction stir processing

2017 ◽  
Vol 233 (5) ◽  
pp. 977-994 ◽  
Author(s):  
Harikrishna Rana ◽  
Vishvesh Badheka
Keyword(s):  
Boron Carbide ◽  
Friction Stir Processing ◽  
Rotational Speed ◽  
Homogeneous Distribution ◽  
Carbide Powder ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Surface Composites ◽  
Aa 7075 ◽  
Powder Particles

In the present research investigation, aluminum–boron carbide surface composites were fabricated using friction stir processing technique. Boron carbide powder particles were incorporated into AA 7075 substrate by the thermomechanical mixing generated through multiple passes of friction stir processing. A parametric investigation was conducted to encounter homogeneous boron carbide powder particles distribution in the substrate matrix by employing various parameter combination sets like tool rotational speed and alteration in tool travel direction. Microstructural characterizations were performed by means of optical microscopy, scanning electron microscopy and X-ray diffraction analysis to investigate on boron carbide powder particles distribution, phases present, and grain morphologies in the substrate matrix. Homogeneous distribution of boron carbide powder particles was observed for surface composites processed at lowest tool rotational speed. Uniform boron carbide powder particles distribution in the processed zone along with various strengthening mechanisms brought about two-fold increase in microhardness and wear resistance of the prepared composites.

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