Thermomechanical model for solidification and cooling simulation of Ni-based superalloy components

نویسندگان

چکیده

One of the challenges encountered in industrialization new single-crystal superalloys parts (like high-pressure turbine blades and vanes for aircraft engines) is to limit mechanical stresses during solidification cooling metal. In order accurately predict viscoplastic flow as well thermo-mechanical behaviour Ni-based superalloy its cooling, this study a thermodynamically-consistent thermo-elasto-viscoplastic model was developed. This takes into account solid-liquid transition occurring material phase. done by introducing compressible-type yield function based on appropriate equivalent stress depending volume fraction solid phase formed propagation dendrites inside liquid material. implemented Abaqus/Standard© F.E. code applied identification parameters using isothermal tensile-relaxation tests driven different strain rates temperatures. First, anisothermal tensile-compression test simulated single integration point. A comparison experimental numerical stress-strain response partially validate model. Second, benchmark involving casting rectangular bar sand mold analyzed.

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ژورنال

عنوان ژورنال: International Journal of Solids and Structures

سال: 2021

ISSN: ['1879-2146', '0020-7683']

DOI: https://doi.org/10.1016/j.ijsolstr.2020.12.009