Abstract :

Titanium Alloys Have Become Indispensable Engineering Materials In Aerospace, Biomedical, Marine, Chemical Processing, And High-performance Automotive Industries Because Of Their Exceptional Strength-to-weight Ratio, Excellent Corrosion Resistance, High Specific Strength, And Superior Mechanical Properties At Elevated Temperatures. Among Various Titanium Alloys, Ti-6Al-4V Is The Most Extensively Utilized Owing To Its Balanced Combination Of Strength, Fracture Toughness, Fatigue Resistance, And Biocompatibility. However, Conventional Fusion Welding Processes Often Introduce Defects Such As Porosity, Solidification Cracking, Residual Stresses, Coarse Grain Growth, And Undesirable Phase Transformations That Degrade Joint Performance. These Limitations Have Encouraged The Development Of Solid-state Joining Techniques Capable Of Producing Defect-free, High-strength Joints While Preserving The Desirable Microstructural Characteristics Of Titanium Alloys. The Present Investigation Experimentally Evaluates The Influence Of Diffusion Bonding Parameters, Including Bonding Temperature, Applied Pressure, And Holding Time, On The Interfacial Microstructure And Mechanical Performance Of Ti-6Al-4V Titanium Alloy Joints. Bonding Experiments Are Conducted Under High-vacuum Conditions Using Varying Combinations Of Process Parameters To Identify The Optimum Bonding Conditions. Advanced Characterization Techniques Including Optical Microscopy (OM), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS), Electron Backscatter Diffraction (EBSD), And X-ray Diffraction (XRD) Are Employed To Investigate Grain Growth, Interfacial Diffusion, Phase Evolution, Void Elimination, And Crystallographic Characteristics Of Bonded Interfaces. Mechanical Characterization Includes Tensile Testing, Microhardness Measurement, Shear Testing, And Fractographic Analysis. Experimental Results Demonstrate That Optimized Diffusion Bonding Parameters Produce Defect-free Interfaces With Complete Metallurgical Bonding, Refined Grain Structures, Minimal Residual Porosity, Enhanced Joint Strength, And Excellent Structural Integrity. The Investigation Provides Valuable Guidelines For Optimizing Diffusion Bonding Processes Used In Advanced Titanium Alloy Structures Requiring Superior Reliability Under Demanding Service Conditions.

Published:

21-4-2026

Issue:

Vol. 26 No. 4 (2026)

Page Nos:

3320-3335

Section:

Articles

License:

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

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