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Advances in the Development of Processing - Microstructure Relations for Titanium Alloys (Postprint)

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Conference Paper

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Air Force Research Laboratory (AFRL) Materials and Manufacturing Directorate Wright Patterson Air Force Base United States

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Advances in the fundamental understanding of microstructure evolution and plastic flow during primary and secondary processing of titanium alloys are summarized. Examples focus on the recrystallization of the beta phase and spheroidization of alpha lamellae during the breakdown of alphabeta titanium alloys, challenges in the rolling of foil of alphabeta and gamma-TiAl alloys, and the effect of microstructure and composition on the superplastic flow behavior of alphabeta titanium alloys. Particular attention is given to models describing the refinement or coarsening of microstructural scale and non-uniformities that may impact forming response during operations such as rolling of sheet and superplastic forming. Current understanding of the persistence of microstructural anomalies such as microtextured regions aka macrozones is also described. Finally, recent developments in the characterization of such features via microscopy and ultrasonics are discussed.

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