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Dynamic Recrystallization in Tial Alloys

  • D.S. Lee (a1), D.M. Dimiduk (a1) and S. Krishnamurthy (a2)

Abstract

TiAl alloys with Cr, V, and Nb additions show promise as high temperature materials due to their high temperature strength and modulus. Dynamic recrystallization has been shown to be important for the processing and superplastic forming of these materials. Earlier studies have indicated that dynamic recrystallization may also occur during tensile straining at or near the proposed use temperature of these alloys. A systematic study has been conducted to determine the effects of various parameters - temperature, strain, strain rate, and microstructure, on the occurrence of dynamic recrystallization near expected use conditions. The conditions near the ductile to brittle transition temperature which bound the onset of dynamic recrystallization in tension and compression were investigated. The findings will be presented and affrelations will be drawn between the contributions of dynamic recrystallization and high temperature to the observed ductility.

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Dynamic Recrystallization in Tial Alloys

  • D.S. Lee (a1), D.M. Dimiduk (a1) and S. Krishnamurthy (a2)

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