143 citations · 205 across the 5 of their papers we have counts for
8 papers
Efficient and quantitative phase field simulations of polycrystalline solidification using a vector order parameter
Tatu Pinomaa, Nana Ofori-Opoku, Anssi Laukkanen +1
A vector order parameter phase field model derived from a grand potential functional is presented as a new approach for modeling polycrystalline solidification of alloys. In this a…
Incorporating density jumps and species-conserving dynamics in XPFC binary alloys
Matthew J. Frick, Nana Ofori-Opoku, Nikolas Provatas
This work presents a consistent formulation of the structural phase-field-crystal model of substitutional binary alloys that allows for the description phases of unequal densities,…
Solidification Characteristics of Laser-Powder Bed Fused AlSi10Mg: Role of Building Direction
Hossein Azizi, Alireza Ebrahimi, Nana Ofori-Opoku +3
In this work, the effect of building direction on the microstructure evolution of laser-powder bed fusion (LPBF) processed AlSi10Mg alloy was investigated. The building direction,…
Self-consistent modeling of anisotropic interfaces and missing orientations: Derivation from phase-field crystal
Nana Ofori-Opoku, James A. Warren, Peter W. Voorhees
Highly anisotropic interfaces play an important role in the development of material microstructure. Using the diffusive atomistic phase-field crystal (PFC) formalism, we determine…
Simulation and analysis of -Ni cellular growth during laser powder deposition of Ni-based superalloys
Supriyo Ghosh, Nana Ofori-Opoku, Jonathan E. Guyer
Cellular or dendritic microstructures that result as a function of additive manufacturing solidification conditions in a Ni-based melt pool are simulated in the present work using…
On the primary spacing and microsegregation of cellular dendrites in laser deposited Ni-Nb alloys
Supriyo Ghosh, Li Ma, Nana Ofori-Opoku +1
In this study, an alloy phase-field model is used to simulate solidification microstructures at different locations within a solidified molten pool. The temperature gradient an…