About this Abstract |
Meeting |
6th World Congress on Integrated Computational Materials Engineering (ICME 2022)
|
Symposium
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6th World Congress on Integrated Computational Materials Engineering (ICME 2022)
|
Presentation Title |
A Static and Dynamic Recrystallization Internal State Variable Constitutive Model Based on Microstructures and Its History Effect |
Author(s) |
Heechen E. Cho, Mark F. Horstemeyer |
On-Site Speaker (Planned) |
Heechen E. Cho |
Abstract Scope |
We present a history-dependent recrystallization material model that unifies static and dynamic effects of recrystallization using continuum Internal State Variable (ISV) constitutive theory. This macroscopic constitutive model includes the recrystallization and grain size variables formulated with structure-property relationships. The recrystallization variable accounts for the evolution of the recrystallized strain-free grains’ volume fraction and its effects on the grain size and mechanical properties at various strain rates, temperatures, and pressures. The novel aspect of this ISV model is that the unification of static-dynamic recrystallization and grain size enables to capture the related mechanical behavior under transient (history-dependent) loading conditions. To demonstrate its history dependence, we validated this recrystallization ISV model against experimental data of sequential loading tests and a multistep manufacturing problem. In these complex boundary value problems, our model, which has been implemented into a finite element code, showed successful agreement with different material’s experimental data. |
Proceedings Inclusion? |
Definite: Other |