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Microstructure-related Modelling of the Deformation Behaviour of the Superalloy CoCr22Ni22W14

  • Randolf Wünsch , Uwe Mühle , Ulrich Martin , Wolfgang Pantleon and Heinrich Oettel
Published/Copyright: December 4, 2021
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 88 Issue 10

Abstract

Specimens of the superalloy CoCr22Ni22W14 were deformed in hot tensile tests at temperatures T1 = 1023 K, T2 = 1073 K and T3 = 1123 K with strain rates ε̇01 = 3.2 ᐧ 10−4 s−1 and ε̇02 = 3.2 · 10−5 s−1 followed by microstructure investigations determining the dislocation density quantitatively and characterizing the precipitation state qualitatively. The strain rate sensitivity m was determined from additional strain rate jump tests. Using the obtained microstructural data the evolution of dislocation density and the stress – strain curves have been simulated based on the “one-parameter model” by Kocks, Mecking and Estrin.

Abstract

An der Legierung CoCr22Ni22W14 sind Warmzugversuche bei den Temperaturen T1 = 1023 K, T2 = 1073 K und T3 = 1123 K mit den Dehngeschwindigkeiten von ε̇01 = 3.2 · 10−4 s−1 und ε̇02 = 3.2 · 10−5 s−1 durchgeführt worden. Anschlieβend erfolgten an allen Proben Mikrostrukturuntersuchungen zur quantitativen Bestimmung der Versetzungsdichte und der qualitativen Beurteilung des Ausscheidungszustandes. Aus parallel durchgeführten Dehnratenwechselversuchen konnte der Spannungsexponent m ermittelt werden. Die aus den Experimenten gewonnenen Daten dienten als Datenbasis für die Modellierung der Versetzungsdichteentwicklung und der Spannung–Dehnung-Kurven mit dem „Ein-Parameter-Modell“ nach Kocks, Mecking und Estrin.

R. Wänsch, U. Mähle, W. Pantleon, H. Oettel TU Bergakademie Freiberg, Institut für Metallkunde Gustav-Zeuner-Straβe 5, D-09596 Freiberg, Germany

Funding statement: We wish to thank the Deutsche Forschungsgemeinschaft for the financial support of the research within the frame of the special research project Sonderforschungsbereich 167 at the University of Karlsruhe.

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Received: 1997-01-15
Published Online: 2021-12-04

© 1997 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Aufsätze
  3. Automatic Determination of Dendritic Arm Spacing in Directionally Solidified Matters
  4. Microstructure and Mechanical Properties of Titanium Castings
  5. Microstructural Features Controlling the Dry Sliding Wear Response of Some Bearing Alloys
  6. Correlation of Microstructure and Giant Magnetoresistance in Electrodeposited Ni – Cu/Cu Multilayers
  7. Microstructure-related Modelling of the Deformation Behaviour of the Superalloy CoCr22Ni22W14
  8. An Assessment of the Si Mobility and the Application to Phase Transformations in Silicon Steels
  9. Simulated Weld HAZ of Vanadium Modified 2.25Cr-1Mo Steel
  10. The Metastable Miscibility Gap in the System Fe–Cu
  11. Precipitation in Iron Aluminides Containing Carbon and Titanium, Zirconium or Niobium
  12. Use of a Single Zirconia Electrolyte Cell to Measure Basicity in Binary and Ternary Carbonate Melts
  13. Adsorption Studies of Water on Copper, Nickel, and Iron: Assessment of the Polarization Model
  14. Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V
  15. Personen
  16. Terminkalender
https://doi.org/10.3139/ijmr-1997-0148

Articles in the same Issue

  1. Frontmatter
  2. Aufsätze
  3. Automatic Determination of Dendritic Arm Spacing in Directionally Solidified Matters
  4. Microstructure and Mechanical Properties of Titanium Castings
  5. Microstructural Features Controlling the Dry Sliding Wear Response of Some Bearing Alloys
  6. Correlation of Microstructure and Giant Magnetoresistance in Electrodeposited Ni – Cu/Cu Multilayers
  7. Microstructure-related Modelling of the Deformation Behaviour of the Superalloy CoCr22Ni22W14
  8. An Assessment of the Si Mobility and the Application to Phase Transformations in Silicon Steels
  9. Simulated Weld HAZ of Vanadium Modified 2.25Cr-1Mo Steel
  10. The Metastable Miscibility Gap in the System Fe–Cu
  11. Precipitation in Iron Aluminides Containing Carbon and Titanium, Zirconium or Niobium
  12. Use of a Single Zirconia Electrolyte Cell to Measure Basicity in Binary and Ternary Carbonate Melts
  13. Adsorption Studies of Water on Copper, Nickel, and Iron: Assessment of the Polarization Model
  14. Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V
  15. Personen
  16. Terminkalender
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