Influence of Joint Configuration on Linear Friction Welded Ti-6Al-4V Alloy Joints

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Authors

  • P. Hariprasath
     Research Scholar, Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University Annamalai Nagar - 608002, Tamil Nadu ,IN
  • P. Sivaraj
     Associate Professor, Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University Annamalai Nagar - 608002, Tamil Nadu ,IN
  • V. Balasubramanian
     Professor and Head, Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University Annamalai Nagar - 608002, Tamil Nadu ,IN
  • Vijay Petley
     Scientist F, Materials Group, Gas Turbine Research Establishment (GTRE) DRDO, Bengaluru ,IN
  • Shweta Verma
     Scientist D, Materials Group, Gas Turbine Research Establishment (GTRE) DRDO, Bengaluru ,IN

DOI:

https://doi.org/10.22486/iwj.v54i2.209183

Keywords:

Linear Friction Welding, Titanium Alloy, Microhardness, Microstructures, Fractography.

Abstract

Ti-6Al-4V alloy is a unique material for structural applications of aerospace industry for the excellent strength and lightweight. The fusion welding of this Titanium alloy resulted severe residual stress formation and coarser grains in the fusion zone. To overcome these problems, a solid state linear friction welding (LFW) is a emerge technique to joining of blade and disk assembly in the next generation aero engines. The plastic deformation followed by forging action resulted finer grain structures in welded regions. This investigation elaborated mechanical behavior and microstructural characteristics of linear friction welded joints. The welding parameters established by statistical response surface methodology. The fabricated joints yielded maximum tensile strength and joint efficiency of 1011 MPa and 98%. The lower microhardness recorded in the thermo mechanical affected zone (TMAZ) among the weld cross section. The weld nugget microstructure composed of equiaxed grain structure. The fracture surface revealed that joints failed under ductile mode. The result concluded that the weld failure mainly due to grain coarsening subsequent deformation leads to weld failure in the LFW joint.

Author Biographies

P. Hariprasath, Research Scholar, Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University Annamalai Nagar - 608002, Tamil Nadu

https://orcid.org/0000-0003-1338-6339

P. Sivaraj, Associate Professor, Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University Annamalai Nagar - 608002, Tamil Nadu

https://orcid.org/0000-0002-3989-5484

V. Balasubramanian, Professor and Head, Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University Annamalai Nagar - 608002, Tamil Nadu

https://orcid.org/0000-0001-7658-6392

Vijay Petley, Scientist F, Materials Group, Gas Turbine Research Establishment (GTRE) DRDO, Bengaluru

https://orcid.org/0000-0003-0821-0929

Shweta Verma, Scientist D, Materials Group, Gas Turbine Research Establishment (GTRE) DRDO, Bengaluru

https://orcid.org/0000-0003-2789-8036

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Published

2021-04-30

Issue

Volume 54, Issue 2, April 2021

Section

Award Winning Paper: Prof. Placid Rodriguez Memorial Lecture 2020

 

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