Thermo-physical simulation of the compression testing for constitutive modeling of GH4169 superalloy during linear friction welding

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Abstract

In order to simulate the flow behavior of GH4169 superalloy during linear friction welding (LFW), the novel isothermal compression tests of GH4169 superalloy were performed using a Gleeble-3500 device, up to a 60% height reduction of the specimens at deformation temperatures ranging from 970 °C to 1150 °C, and strain rates ranging from 0.01 s-1 to 10 s-1. In this investigation, a constitutive Arrhenius-type equation model was used to characterize the deformation behavior of the GH4169 superalloy during compression process. Under the different strains (0.1-0.7), the corresponding material constants and the activation energy for GH4169 were determined. The flow stresses calculated by constitutive equation were in a very good agreement with the experimental data. Further, the microstructures of the deformed specimens were observed and the microhardnesses of the deformed specimens were measured.

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Yang, X., Li, W., Ma, J., Hu, S., He, Y., Li, L., & Xiao, B. (2016). Thermo-physical simulation of the compression testing for constitutive modeling of GH4169 superalloy during linear friction welding. Journal of Alloys and Compounds, 656, 395–407. https://doi.org/10.1016/j.jallcom.2015.09.267

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