Details

Autor(en) / Beteiligte

• Azarbarmas, M.
• Aghaie-Khafri, M.

Titel

A New Cellular Automaton Method Coupled with a Rate-dependent (CARD) Model for Predicting Dynamic Recrystallization Behavior

Ist Teil von

• Metallurgical and materials transactions. A, Physical metallurgy and materials science, 2018-05, Vol.49 (5), p.1916-1930

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2018

Quelle

SpringerLink

Beschreibungen/Notizen

• A comprehensive cellular automaton (CA) model should be coupled with a rate-dependent (RD) model for analyzing the RD deformation of alloys at high temperatures. In the present study, a new CA technique coupled with an RD model—namely, CARD—was developed. The proposed CARD model was used to simulate the dynamic recrystallization phenomenon during the hot deformation of the Inconel 718 superalloy. This model is capable of calculating the mean grain size and volume fraction of dynamic recrystallized grains, and estimating the phenomenological flow behavior of the material. In the presented model, an actual orientation definition comprising three Euler angles was used by implementing the electron backscatter diffraction data. For calculating the lattice rotation of grains, it was assumed that all slip systems of grains are active during the high-temperature deformation because of the intrinsic rate dependency of the procedure. Moreover, the morphological changes in grains were obtained using a topological module.