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Microstructure Characterization of Superalloy 718 during Dissimilar Rotary Friction Welding

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Abstract:

In the present study, dissimilar friction welding between super alloy 718 and carbon steel friction welded to evaluate the formation of microstructure in the weld interface and in superalloy 718. The temperature during friction welding at weld interface was recorded to determine the temperature effect on the microstructural changes on alloy 718 side. The finite element modeling of weld interface temperature, deformation and stresses were evaluated and validated with the experimental results. The microstructural observation along with the weld interface and adjacent regions are studied. The effect of friction welding on superalloy weld interface and microstructural formation were investigated under electron backscattered diffraction analysis to evaluate the grain size measurements. The effect of thermomechanical action on the microstructure was evaluated by texture analysis.

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Periodical:

Materials Science Forum (Volume 969)

Pages:

211-217

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.969.211

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Online since:

August 2019

Authors:

Muralimohan Cheepu*, D. Venkateswarlu, P. Nageswara Rao, V. Muthupandi, Katakam Sivaprasad, Woo Seong Che

Keywords:

Finite Elemental Modeling, Friction Welding, Grain Size, Microstructure, Phase Analysis, Superalloy 718

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© 2019 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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