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Transactions of the Indian Institute of Metals

, Volume 71, Issue 12, pp 2945–2952 | Cite as

Identification of Constitutive Model Parameters for Nimonic 80A Superalloy

  • Mehmet Erdi Korkmaz
  • Patricia Verleysen
  • Mustafa Günay
Technical Paper
  • 79 Downloads

Abstract

Nimonic 80A is a nickel-chrome superalloy, commonly used due to its high resistance against creep, oxidation, and temperature corrosion. This paper presents the material constitutive models of Nimonic 80A superalloy. Johnson–Cook (JC) and modified JC model is preferred among the different material constitutive equations (Zerill Armstrong, Bodner Partom, Arrhenius type) due to its accuracy in the literature. Three different types of compression tests were applied to determine the equation parameters. Firstly, quasi-static tests were performed at room temperature. These tests were conducted at 10−3, 10−2, and 10−1 s−1 strain rates. Secondly, compression tests were performed at room temperature at high strain rates (370–954 s−1) using the Split-Hopkinson pressure bar. Finally, compression tests were performed at a temperature level from 24 to 200 °C at the reference strain rate (10−3 s−1). Johnson–Cook and modified JC model parameters of Nimonic 80A were determined with the data obtained from these tests, and they were finally verified statistically.

Keywords

Nimonic 80A Johnson–Cook Strain rate Split-Hopkinson pressure bar 

Notes

Acknowledgements

The authors would like to thank Karabük University Coordinatorship of Scientific Research Projects for the financial support with Project Number KBÜBAP-18-DR-005 and also Prof. Dr. Patricia Verleysen in the Material Laboratory of Ghent University.

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Copyright information

© The Indian Institute of Metals - IIM 2018

Authors and Affiliations

  1. 1.Department of Mechanical Engineering, Faculty of EngineeringKarabük UniversityKarabükTurkey
  2. 2.Department of Materials Science and Engineering, Faculty of Engineering and ArchitectureGhent UniversityGhentBelgium

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