Precipitation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si3.svg"><mml:msup><mml:mi>γ</mml:mi><mml:mrow><mml:mo>″</mml:mo></mml:mrow></mml:msup></mml:math>in Inconel 718 alloy from microstructure to mechanical properties

This paper presents a coupled approach able to describe γ″ precipitation evolution and associated yield strength after various heat treatments in Inconel 718 alloy. The state is modeled via the implementation of classical nucleation growth theories for plate-shaped particles. model validated through small-angle neutron scattering transmission electron microscopy experiments. size distribution serves as an input parameter using micromechanical based on shear bypass mechanisms accounting particular shapes precipitates. Results are good agreement with measured stresses states. A complete simulated TTT diagram phase proposed. finally applied series non-isothermal representative welding (or additive manufacturing) from peak aged state.