Effect of hot extrusion on mechanical and microstructural characteristics of stir cast AA6061/SiC/graphite hybrid composites

2020 ◽  
Author(s):  
J. Senthilkumar ◽  
P. Suresh Mohan Kumar ◽  
M. Balasubramanian
Keyword(s):  
Hybrid Composites ◽  
Hot Extrusion ◽  
Microstructural Characteristics

scholarly journals Enhancing Mechanical Response of Monolithic Magnesium Using Nano-NiTi (Nitinol) Particles

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1014 ◽  
Author(s):  
Gururaj Parande ◽  
Vyasaraj Manakari ◽  
Saif Wakeel ◽  
Milli Kujur ◽  
Manoj Gupta
Keyword(s):  
Mechanical Properties ◽  
Mechanical Response ◽  
Hot Extrusion ◽  
Nickel Titanium ◽  
Structure Property ◽  
Microstructural Characteristics ◽  
Magnesium Matrix ◽  
Melt Deposition ◽  
Synthesized Materials ◽  
Minimal Adverse Effect

The present study focuses on investigating the effects of Nickel-Titanium (NiTi) nanoparticles on the microstructure and properties of pure Mg. Mg composites containing varying weight percentages (0.5, 1, 1.5, 3) of NiTi nanoparticles were fabricated using Disintegrated Melt Deposition (DMD), followed by hot extrusion. The synthesized materials were characterized in order to investigate their physical, microstructural and mechanical properties. Synthesized materials were characterized for their density and porosity levels, microstructural characteristics, and mechanical response. Superior grain refinement was realized by the presence of NiTi nanoparticles in the magnesium matrix. The addition of NiTi nanoparticles resulted in strength property enhancements of pure Mg with minimal adverse effect on the ductility. Structure-property evaluations are detailed in the current study.

scholarly journals Mechanical Characterization of Graphene Nanoplatelets-Reinforced Mg-3Sn Alloy Synthesized by Powder Metallurgy

Metals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 62
Author(s):  
Pravir Kumar ◽  
Katerina Skotnicova ◽  
Ashis Mallick ◽  
Manoj Gupta ◽  
Tomas Cegan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Powder Metallurgy ◽  
Compressive Strain ◽  
Hot Extrusion ◽  
Diffraction Field ◽  
X Ray Diffraction ◽  
Microstructural Characteristics

The present study investigated the effects of alloying and nano-reinforcement on the mechanical properties (microhardness, tensile strength, and compressive strength) of Mg-based alloys and composites. Pure Mg, Mg-3Sn alloy, and Mg-3Sn + 0.2 GNP alloy-nanocomposite were synthesized by powder metallurgy followed by hot extrusion. The microstructural characteristics of the bulk extruded samples were explored using X-ray diffraction, field-emission scanning electron microscopy, and optical microscopy and their mechanical properties were compared. The microhardness, tensile strength, and compressive strength of the Mg-3Sn alloy improved when compared to those of monolithic Mg sample and further improvements were displayed by Mg-3Sn + 0.2 GNP alloy-nanocomposite. No significant change in the compressive strain to failure was observed in both the alloy and the alloy-nanocomposite with respect to that of the pure Mg sample. However, an enhanced tensile strain to failure was displayed by both the alloy and the alloy-nanocomposite.

Slurry Erosive Wear Behavior of Forged Al6061-CeO2-TiO2 Hybrid Composites

2013 ◽  
Author(s):  
Ramesh Chinnakurli Suryanarayana ◽  
Ummar Khan Attaullah ◽  
Kumar Saheb ◽  
Apoorva Kumar ◽  
Manoj Kumar Rajput
Keyword(s):  
Aluminium Alloy ◽  
Corrosion Protection ◽  
Aluminium Alloys ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Hot Forging ◽  
Erosive Wear ◽  
Hot Extrusion ◽  
Matrix Alloy ◽  
Slurry Erosion

Aluminium alloys are being widely used in naval applications owing to their excellent corrosion resistance and high formability characteristics. One of the most popular naval components is the tarpedo blade which makes use of forged aluminium alloy followed by anodizing surface treatment for corrosion protection. In recent years, there have been few attempts to replace the conventional aluminium alloys by their composites for the tarpedo blade applications. Literature review clearly says that CeO2 (Ceria) coating on aluminium and aluminium composites enhances their corrosion protection in aggressive marine environment. Further, there are reports suggesting that combination of CeO2 and TiO2 do yield better corrosion protection. However, there is no information on the work related to development of hybrid ceramic reinforced aluminium alloy matrices with CeO2 and TiO2 as particulate reinforcements for potential naval applications. In the light of above, the present work focuses on the development of novel Al6061-CeO2-TiO2 hybrid metal matrix composite by stir casting route followed by hot extrusion with an extrusion ratio of 8:1 at a temperature 550 °C and hot forging at 475 °C. The developed forged hybrid composites and the matrix alloy have been evaluated for microstructure, micro hardness and slurry erosion wear tests as per the ASTM Standards.

scholarly journals Effect of Extrusion Ratio & Extrusion Temperature on Mechanical Properties of Hot Extruded Hybrid Composites of Al6061/Sic/Graphite

2019 ◽  
Vol 8 (11) ◽  
pp. 2821-2825
Keyword(s):  
Mechanical Properties ◽  
Hybrid Composites ◽  
Hot Extrusion ◽  
Extrusion Ratio ◽  
Extrusion Temperature ◽  
Fixed Amount

In this work hot extrusion of hybrid composites of Al6061/SiC/Gr was carried out at ratios of 2:1,3:1&4:1 & temperatures of 4500 ,5000 ,&5500 c at various compositions of 0,2,4,6 &8 % of SiC and fixed amount of graphite i.e 2% using 200 tonn capacity press at a speed of 1mm/sec to investigate mechanical properties like tensile, compression & BHN and after solutionising and aging .It was found that at ratio 3:1 and temperature 5000 c all the above three properties were found to be improved compared to extrusion .

scholarly journals Mechanical Characterization of Graphene Nanoplatelets-Reinforced Mg-3Sn Alloy Synthesized by Powder Metallurgy

2020 ◽  
Author(s):  
Pravir Kumar ◽  
Katerina Skotnicova ◽  
Ashis Mallick ◽  
Manoj Gupta ◽  
Tomas Cegan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Powder Metallurgy ◽  
Compressive Strain ◽  
Hot Extrusion ◽  
Diffraction Field ◽  
X Ray Diffraction ◽  
Microstructural Characteristics

The present study investigated the effects of alloying and nano-reinforcement on the mechanical properties (microhardness, tensile strength, and compressive strength) of Mg-based alloys and composites. Pure Mg, Mg-3Sn alloy, and Mg-3Sn+0.2GNP alloy-nanocomposite were synthesized by powder metallurgy followed by hot extrusion. The microstructural characteristics of the bulk extruded samples were explored using X-ray diffraction, field-emission scanning electron microscopy, and optical microscopy and their mechanical properties were compared. The microhardness, tensile strength, and compressive strength of the Mg-3Sn alloy improved when compared to those of monolithic Mg sample and further improvements were displayed by Mg-3Sn+0.2GNP alloy-nanocomposite. No significant change in the compressive strain to failure was observed in both the alloy and the alloy-nanocomposite with respect to that of the pure Mg sample. However, an enhanced tensile strain to failure was displayed by both the alloy and the alloy-nanocomposite.

scholarly journals Thermal Conductivity & Thermal Expansion Behaviour of Hot Extruded Hybrid Composites of Al6061/Sic/GR

2019 ◽  
Vol 8 (4) ◽  
pp. 2942-2945
Keyword(s):  
Thermal Conductivity ◽  
Thermal Expansion ◽  
Hybrid Composites ◽  
Hot Extrusion ◽  
Stir Casting ◽  
Extrusion Ratio ◽  
Casting Method ◽  
Thermal Expansion Behaviour ◽  
Expansion Behaviour

In This Proposed Work Specimens Prepared By Stir Casting Method For Different Combinations Of Reinforcement’s Sic , Gr And Al6061 As Matrix, Further Subjected To Hot Extrusion At Ratios Of 2:1,3:1 & 4:I Temperatures Of 450,500 &5500c & Machined To ASTME831 And These Specimens Were Tested For Thermal Conductivity And Co-Efficient Of Thermal Expansion, Least Of All The Above Ratios And Temperatures Were Solutionised And Aged And The Process Repeated It Was Found That At Extrusion Ratio Of 3:1 With A Combination Of Al6061/4%Sic/2%Gr Both Thermal Conductivity & Thermal Expansion Was Found To Be Improved Compared To Conventional Aluminium.

Influence of Hot Extrusion Temperature on the Microstructure and the Mechanical Properties of (ABOw + WO3p)/Al Hybrid Composites

JOM ◽  
2013 ◽  
Vol 65 (5) ◽  
pp. 593-598 ◽  
Author(s):  
Y. C. Feng ◽  
G. J. Cao ◽  
G. H. Fan ◽  
L. P. Wang ◽  
L. Geng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hybrid Composites ◽  
Hot Extrusion ◽  
Extrusion Temperature
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