X-ray Investigation of Microstructure and Properties Evolution on Superalloy Inconel-718 derivative during Rapid Joule Heating and Severe Plastic Deformation Concurrently

Lembit Kommel; R. Traksmaa; V. Mikli

doi:10.31686/ijier.vol6.iss9.1145

Authors

Lembit Kommel Tallinn University of Technolgy, Estonia
R. Traksmaa Tallinn University of Technology
V. Mikli Tallinn University of Technology

DOI:

https://doi.org/10.31686/ijier.vol6.iss9.1145

Keywords:

X-ray line-profile analysis, Inconel-718 derivative, electric upset forging, crystallites deformation, high cycle fatigue

Abstract

The purpose of this study is to X-ray line-profile analysis of the effect of rapid Joule heating and severe plastic deformation concurrently on microstructure and properties evolution in polycrystalline austenitic Fe-balanced superalloy EP718E, which is Inconel 718 derivative. The microstructure of superalloy at different stages of processing was examined by X-ray diffraction, by scanning electron microscopy, and by energy dispersive spectrometry techniques. The mechanical properties of evolution were studied by means of tension and high cycle fatigue testings. The results of X-ray study show that the intensity, raw areas, and net areas were a step–by–step changed according to processing routines. Is shown that under shear stress the fcc-crystallites were deformed and the peaks parameters by 2-Theta scale changed partly.

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Author Biographies

Lembit Kommel, Tallinn University of Technolgy, Estonia

Department of Mechanical and Industrial Engineering
R. Traksmaa, Tallinn University of Technology

Department of Mechanical and Industrial Engineering
V. Mikli, Tallinn University of Technology

Derpartment of Materials and Environmental Technology

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