Phase-Field Simulations of Solidification in Support of Additive Manufacturing Processes

Abstract

For purposes relating to force protection through advancements in multiscale materials modeling, this report explores the use of the phase-field method for simulating microstructure solidification of metallic alloys. Specifically, its utility was examined with respect to a series of increasingly complex solidification problems, ranging from one dimensional, isothermal solidification of pure metals to two-dimensional, directional solidification of non-isothermal, binary alloys. Parametric studies involving variations in thermal gradient, pulling velocity, and anisotropy were also considered, and used to assess the conditions for which dendritic and/or columnar microstructures may be generated. In preparation, a systematic derivation of the relevant governing equations is provided along with the prescribed method of solution.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2020
Accession Number
AD1099563

Entities

People

  • Arjun Tekahur
  • Jacob A Kallivayalil
  • Jeffrey B. Allen
  • Robert D. Moser
  • Zackery B. Mcclelland

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Additive Manufacturing
  • Binary Alloys
  • Computational Science
  • Electron Beam Melting
  • Equations
  • Heat Energy
  • Latent Heat
  • Manufacturing
  • Materials
  • Materials Science
  • Phase Transformations
  • Physical Properties
  • Selective Laser Melting
  • Selective Laser Sintering
  • Simulations
  • Temperature Gradients
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Dynamics.
  • Metallurgy