Multiaxial constitutive model accounting for the strength-differential in Inconel 718

Some applications of Burzyński yield condition in metal plasticity

“…Simulation of tests on the Inconel 718 thin-walled tubes subjected to torsion after tension or compression [12] The strength differential effect has been also observed by Gil et al [31,32] in the aged Inconel 718, a nickel base superalloy used Table 1 Material properties for the 2024-T351 aluminum alloy at room temperature. [12] are presented in Fig. 9.…”

“…With the plasticity theory based on the Burzyń ski yield condi tion, we have simulated tensile tests on notched specimens of the 2024 T3 aluminum alloy [6], as well as tests on the thin walled tubes of Inconel 718 subjected to torsion after tension or compres sion [12]. The comparison between numerical and experimental results reveals that the application of the plasticity theory with the paraboloid case of the Burzyń ski yield condition correlates bet ter with experimental data than the results obtained with use of the classical plasticity theory with the Huber Mises yield condi tion.…”

“…Iyer and Lissenden [12] proposed a set of experiments with non proportional loads to char acterize this material. The experiments developed by [12] consist in axial torsional tests of tubular specimens (subjected to an axial force and torque as shown in Fig. 7) with the outer and inner diameters of D 0 = 21.0 mm and D i = 15.9 mm respectively, and the length L g = 25 mm.…”

“…The finite element mesh used in the computations in ABAQUS/ Standard [30], with a total of 4600 8 node elements, is shown in Fig. 8, and the simulations of the specimen considering the non proportional load paths cases are compared with the experimental results given by [12]. and k = 1.1 for two non proportional load paths: tension followed by torsion (Figs.…”

“…The computations were compared with the experimental data and the results of numerical calculations made with the application of the Drucker Prager yield condition presented in [6]. Also, the experimental data obtained by Iyer and Lissenden [12] for the polycrystalline nickel base alloy Inconel 718, which reveals the strength differential effect, were applied. Numerical simula tions of experimental tests of a thin walled tube subjected to tension combined with torsion, as well as a thin walled tube subjected to compression combined with torsion, were per formed.…”