Modelling of Viscoplastic Behaviour of IN718 Under Hot Forging Conditions

Journal Article · Sat Apr 07 00:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2729677· OSTI ID:21056979

Lin, Y P; Lin, J; Dean, T A ^[1]; Brown, P D ^[2]

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1. Department of Mechanical and Manufacturing Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)
2. Rolls-Royce plc, PO Box31, Derby DE24 8BJ (United Kingdom)

The mechanical properties of IN718 are directly related to microstructure such as grain size and the hardening mechanisms, which are effective during thermomechanical processing and subsequent heat treatment. In this study a set of unified viscoplastic constitutive equations were determined for IN718 from experimental data of hot forging conditions. Techniques were developed to analyse the reliability and consistency of the experimental data derived from different previous publications. In addition to viscoplastic flow of the material, the determined material model can be used to predict the evolution of dislocations, recrystallisation and grain size occurring during thermomechanical processing.

• OSTI ID: 21056979
• Journal Information: AIP Conference Proceedings, Vol. 907, Issue 1; Conference: 10. ESAFORM conference on material forming, Zaragoza (Spain), 18-20 Apr 2007; Other Information: DOI: 10.1063/1.2729677; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPUTERIZED SIMULATION
DISLOCATIONS
FORGING
GRAIN SIZE
HARDENING
NICKEL ALLOYS
PLASTICITY
PROCESSING
RECRYSTALLIZATION
RELIABILITY
THERMOMECHANICAL TREATMENTS
VISCOSITY