Abstract: In order to predict hot deformation behavior of superalloy nimonic 80A, a back-propagational artificial neural network (BP-ANN) and strain-dependent Arrhenius-type model were established based on the experimental data from isothermal compression tests on a Gleeble-3500 thermo-mechanical simulator at temperatures ranging of 1050–1250 ̋C, strain rates ranging of 0.01–10.0 s ́1. A comparis...

Abstract This article reports the effects of friction on flow stress-strain curve obtained from uniaxial compression test. Uniaxial test was done at deformation temperature range 575 °C–650 °C and strain rates 0.001 s −1 , 0.01 0.1 0.5 to a 0.6 using Gleeble ® 3500 thermo-mechanical simulator. The parameter calculated by analytical equation literature. study results. results showed variation be...

Thermomechanical fatigue loadings (TMF) applied on components in a certain temperature range with variable state of stress (tensile and/or compression) produce localized concentration plastic strains that results crack initiation and propagation. The time evolution must be known priori to predict the lifetime part submitted TMF loadings, which requires an extensive campaign mechanical character...

The thermo-mechanical controlled process (TMCP) of 800-MPa-grade non-quenched tempered steel used for penstocks was simulated on a Gleeble-3500 thermo-mechanical simulator. The effect of the finish cooling temperature (FCT) which ranged from 350–550 ◦C on the microstructure and mechanical properties was studied. The microstructure of TMCP specimens is primarily composed of lath bainite (LB) and...

High-temperature tensile testing of AH36 material in a wide range of temperatures (1173-1573 K) and strain rates (10-4-10-2 s-1) has been obtained by using a Gleeble system. These experimental stress-strain data have been adopted to develop the constitutive equation. The constitutive equation of AH36 material was suggested based on the modified Arrhenius-type equation and the modified Rossard e...