Constitutive Modeling and Microstructural Investigations for Evaluating Hot Deformation Behavior of Additively Manufactured Inconel 718 Superalloy
Source abstract
Abstract
Additive manufacturing (AM) is a near-net-shape manufacturing method that can fabricate complex components in one step. Post-processing methods, such as hot forging, can be used in conjunction with AM to leverage the properties and efficiencies of both processes by minimizing solidification defects and anisotropic mechanical properties mechanical properties, such as fatigue resistance and strength. In this study, hot compression tests were conducted under different conditions to evaluate the hot deformation behavior of additively manufactured Inconel 718 samples using constitutive equations and processing maps. The results indicated that the flow stress was significantly affected by the deformation parameters, which increased with decrease in temperature and increase in strain rate. Constitutive equations and processing maps were obtained using experimental data to evaluate the hot deformation behavior under different conditions. According to the processing map, a maximum efficiency of 35% for Inconel 718 was obtained at a strain rate of 0.001 s−1 and a temperature of 1000 °C, where complete dynamic recrystallization occurred. Under these optimized conditions, an isotropic fine microstructure was developed with a mean grain size of 2.3 μm.
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Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · Metallurgy and Material Forming · Additive Manufacturing and 3D Printing Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
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