Abstract :

High-Entropy Alloys (HEAs) Have Emerged As A Revolutionary Class Of Advanced Metallic Materials Due To Their Exceptional Combination Of Mechanical Strength, Ductility, Fracture Toughness, Thermal Stability, Corrosion Resistance, And Wear Resistance. Unlike Conventional Alloys That Are Primarily Based On One Principal Element, HEAs Consist Of Five Or More Principal Elements In Near-equiatomic Proportions, Resulting In High Configurational Entropy That Promotes The Formation Of Simple Solid-solution Phases With Remarkable Structural Stability. Although HEAs Exhibit Superior Mechanical Behavior Under Conventional Processing Routes, Further Enhancement Of Their Microstructure And Mechanical Performance Can Be Achieved Through Severe Plastic Deformation (SPD) Techniques. SPD Introduces Ultrahigh Strains Into Metallic Materials Without Significantly Altering Their Overall Dimensions, Producing Ultrafine-grained And Nanocrystalline Microstructures With Exceptional Mechanical Properties. This Research Investigates The Microstructural Evolution And Mechanical Performance Of High-Entropy Alloys Subjected To Severe Plastic Deformation By Integrating Advanced Metallurgical Characterization Techniques Including Electron Backscatter Diffraction (EBSD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-Ray Diffraction (XRD), And Mechanical Testing Methods Such As Tensile Testing, Hardness Measurement, Compression Testing, Wear Analysis, And Fracture Examination. The Proposed Study Systematically Analyzes Grain Refinement, Dislocation Evolution, Twin Formation, Phase Stability, Texture Development, Recrystallization Behavior, Precipitation Characteristics, And Deformation Mechanisms Occurring During Equal Channel Angular Pressing (ECAP), High Pressure Torsion (HPT), Accumulative Roll Bonding (ARB), And Multi-Directional Forging (MDF). Experimental Investigations Demonstrate Significant Improvements In Yield Strength, Ultimate Tensile Strength, Hardness, Fatigue Resistance, Wear Resistance, And Microstructural Stability While Maintaining Acceptable Ductility. The Findings Contribute To The Development Of Next-generation Structural Materials Suitable For Aerospace, Defense, Automotive, Marine, Biomedical, Cryogenic Engineering, Nuclear Energy, Additive Manufacturing, And Advanced Industrial Applications Requiring Superior Strength-toweight Ratio And Long-term Structural Reliability

Published:

24-10-2024

Issue:

Vol. 24 No. 10 (2024)

Page Nos:

516-532

Section:

Articles

License:

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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