Microstructural and thermal stability of a Ti-43AI alloy containing dispersoids of titanium di-boride |
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| Authors: | M Saqib I Weiss G M Mehrotra E Clevenger A G Jackson H A Lipsitt |
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| Affiliation: | (1) Department of Mechanical and Materials Engineering, Wright State University, 45435 Dayton, OH;(2) Departmentof Materials Science and Engineering, University of Wisconsin, 53706 Madison, WI;(3) Department of Mechanical and Materials Engineering, Wright State University, is Principal Research Scientist with Universal Energy Systems, Inc., 45432 Dayton, OH |
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| Abstract: | Ti-43Al (atomic percent) alloy containing a dispersion of 7 vol pct TiB2 particles was exposed to various thermal treatments to determine the stability of TiB2 in an ⇌2 + β-phase matrix. No new phases were detected at the particle/matrix interfaces even after thermal exposure at 1473 K for
7 days. The absence of an Al peak in the energy dispersive X-ray analysis system (EDS) spectra from TiB2 particles chemically extracted from the specimens aged at 1473 K for 7 days indicated no diffusion of Al from the matrix
to the particles. These results indicate that TiB2 is stable in an α2+ β matrix at 1473 K.
E. Clevenger, formerly Undergraduate Student, Department of Mechanical and Materials Engineering, Wright State University |
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