Study of as-cast structure formation in Titanium alloy

Eric Balestra, Mark Ward, Ashish Patel, Nils Warnken

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Titanium alloys are an important class of materials for light-weight, high strength and high temperature applications. They are widely use in the aerospace sector. Melting and solidification of Titanium is very common in industrial practice, either during the alloy production or during casting of components. Despite this, the formation of as-cast structure in Ti-Alloys has received very little attention so far. This can be attributed to the difficulty of studying solidification behaviour of these alloys, which are very reactive, with high melting temperatures and undergo a solid-state transformation upon cooling which makes the as-cast structure very difficult to observe.
In this study we present an attempt to overcome the aforementioned challenges. Samples of Ti-1023 and Ti-64 have been processed by plasma-arc-melting (PAM) in a laboratory size copper crucible, involving melting and solidification. The observed microstructure shows break-up of planar solidification fronts, and columnar to equiaxed transitions during solidification. Dendrites can be clearly observed from microsegregation patterns.
Original languageEnglish
Title of host publicationSolidification Processing 2017:
Subtitle of host publicationProceedings of the 6th Decennial International Conference on Solidification Processing
EditorsZhongyun Fan
PublisherBrunel University
Number of pages4
ISBN (Print)978-1-908549-29-7
Publication statusPublished - 25 Jul 2017
Event6th Decennial International Conference on Solidification Processing - Beaumont Estate, Old Windsor, United Kingdom
Duration: 25 Jul 201728 Jul 2017


Conference6th Decennial International Conference on Solidification Processing
Abbreviated titleSP17
Country/TerritoryUnited Kingdom
CityOld Windsor
Internet address


  • Ti alloys
  • solidification
  • PAM
  • dendritic structure
  • cellular structure
  • planar solidification


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