Large scale phase field simulations of microstructure evolution During thermal cycling of Ti-6Al-4V

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

During laser additive manufacturing of Ti-6Al-4V, layer bands are formed approximately three layers below the heat source as it experiences multiple heating and cooling cycles that straddle the alpha to beta transformation temperature. Within the layer band the microstructure is essentially a colony structure while outside the bands a basket-weave structure is obtained. The transition in the microstructure leads to significant anisotropy in the fatigue properties of the component along and normal to the build direction. We present large scale phase field simulations with high spatial resolution, and incorporating energy contributions due to thermodynamics, interfacial and strain energies, to demonstrate the evolution of multiple variants of alpha and show that under certain thermal conditions it is possible for the microstructure to undergo the above transition.

Original languageEnglish
Title of host publicationPTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015
EditorsLong-Qing Chen, Matthias Militzer, Gianluigi Botton, James Howe, Chadwick Sinclair, Hatem Zurob
PublisherInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015
Pages249-255
Number of pages7
ISBN (Electronic)9780692437360
StatePublished - 2015
EventInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015 - Whistler, Canada
Duration: Jun 28 2015Jul 3 2015

Publication series

NamePTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015

Conference

ConferenceInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015
Country/TerritoryCanada
CityWhistler
Period06/28/1507/3/15

Funding

Research sponsored by the Laboratory Directed Research and Development program at Oak Ridge National Laboratory, managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy. This research used resources of the Center for Computational Sciences at Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under contract DE-AC05-00OR22725.

Keywords

  • Additive manufacturing
  • Basket weave
  • Colony
  • Phase field

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