Finite Element and Experimental Analysis of Residual Stresses in Electron Beam Welded Nickel-Based Superalloys

Authors

DOI:

https://doi.org/10.13052/ejcm2642-2085.30235

Keywords:

Nickel-based superalloys, electron beam welding, finite element analysis, Abaqus software, residual stress

Abstract

In this paper, two different nickel-based superalloys, namely Inconel 718 and Nimonic 80A were joined using electron beam welding techniques with three different welding parameters. A finite element analysis (FEA) using Abaqus software was carried out to calculate the residual stresses due to welding. Both transverse and longitudinal residual stresses were determined. Also, an X-ray residual stress measurement system, μ-X360 Ver. 2.5.6.2 was used for measuring transverse residual stress along and across the weld centerline. The transverse residual stress found by FEA and that measured experimentally was nearly the same thus validating the FEA. Also, the peak values of longitudinal residual stress found using the FEA were close to the yield strengths of the base metals as found elsewhere.

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Author Biographies

Tom Saju, School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu, India

Tom Saju is presently doing his Ph.D. in welding technology from the Vellore Institute of Technology. Vellore, Tamil Nadu, India. He has completed his M Tech in 2019 from Karunya Institute of Technology and Science, Coimbatore, Tamil Nadu, India, and B Tech degree in 2016 from Mahatma Gandhi University, Kerala, India. His area of interest includes similar and dissimilar welding technology, Finite element analysis, material characterization, fracture studies, etc.

M. Velu, School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu, India

M. Velu is an Associate Professor in the School of Mechanical Engineering, VIT University, Vellore, India. He received his Ph.D. in the field of Fracture and Fatigue of Dissimilar Welded Joints in 2015 from VIT University, Vellore, Tamil Nadu, India, M. E degree in Engineering Design from College of Engineering Guindy, Anna University, Chennai, Tamil Nadu, India in the year 1999 and B.E degree in Mechanical Engineering from University of Madras, India in the year 1995. His area of interest includes Similar Welding, Dissimilar Welding, Fracture, and Fatigue of metals. He has more than 20 years of teaching experience and 10 years of research experience. He has published research papers in the field of Fracture, Fatigue, and Welding. Currently, he is working in the field of Fracture, Fatigue of Dissimilar Welded Joints of Ni-based Super-alloys for Gas Turbine applications.

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Published

2021-10-09

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Original Article