Hot Deformation Behavior and Processing Map of a Nickel-Base Superalloy GH4169

Abstract:

The hot deformation behaviors of the nickel-base superalloy GH4169 have been studied by isothermal constant true strain rate compression testing at 950°C-1150°C, 0.01s^-1-10s^-1 and the height reduction 50%. The processing maps of GH4169 alloy have been constructed at different strains on the basis of testing data using a dynamic materials modeling. The maps exhibited two domains: the first at 950°C - 1100°C and strain rate higher than 0.1s^-1, with a peak efficiency of power dissipation of 0.1, and the second at 950°C-1100°C and strain rate lower than 1s^-1, with a peak efficiency of power dissipation of 0.4 and the strain rate of 0.01s^-1. On the basis of microstructure observations, the first exhibits adiabatic shear bands, which called instability domain, the second represents fine recrystallized grain structures, which called stability domain. The optimal hot-working parameters are at 1050°C, 0.01s^-1.

• Periodical: Advanced Materials Research (Volumes 834-836)
• Pages: 432-436
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.834-836.432
• Online since: October 2013
• Authors: Fu Wei Kang*, Xue Min Zhang, Jian Fei Sun, Jun Ling Zhao
• Keywords: Hot Compression Deformation, Microstructure, Nickel-Base Superalloy GH4169, Processing Map

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