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Processing Map and Flow Localization of a TiAl/TiB2 XD® Composite*

  • D. Zhao (a1), P. K. Chaudhury (a1), M. Thirukkonda (a1) and J. J. Valencia (a1)

Abstract

Isothermal compression tests were conducted on a particulate reinforced Ti-44Al–3V+7.5v/o TiB2 composite produced by the XD® process over wide ranges of temperatures and strain rates, 1050 to 1300 C and 0.001 to 1.0 s-1, respectively. Flow localization parameter analysis was performed to analyze the flow behavior of the composite under various processing conditions, and the results were compared to those by dynamic material modeling. Microstructural characterization was also conducted to correlate the flow behavior with post-deformation microstructures. With combined information on flow behavior and microstructures, the processing condition for relatively stable flow and uniform microstructure was determined to be 1300 C and 0.01 to 0.1 s-1.

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*

This work was conducted by the National Center for Excellence in Metalworking Technology, operated by Concurrent Technologies Corporation, under contract to the U.S. Navy as a part of the U.S. Navy Manufacturing Technology Program.

®

XD is a registered trademark of Martin Marietta, Baltimore, MD.

Footnotes

References

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2. Kampe, S.L., and Cristodoulou, L., presented at TMS Fall Meeting, Cincinnati, OH, 1991 (unpublished).
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14. Thirukkonda, M., Chaudhury, P.K., Zhao, D., and Valencia, J.J., Harold Margolin Symp. on Micro./Prop. Rela. of Ti Alloys, TMS Spring Meeting, San Francisco, CA, 1994.

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