Abstract
The deformation behavior of bcc (β) Ti-V single crystals containing the athermal ω phase was studied using tensile tests, optical and electron microscopy and X-ray and electron diffraction. The stress-strain curves were characterized by a marked yield point and an essentially zero work hardening rate. The deformation structures consisted of wavy slip and stress-induced plates. Both X-ray and electron diffraction showed that the stress-induced plates consist of one variant of the omega phase, with the orientation relation to the parentß phase close to (0001)ω ‖(001)ω; (•1120)ω ‖(110)β. The habit plane was of the type 554. A small amount of ά (hcp) phase was present within the ω plate, with orientation relation to the β phase close to the Burgers relationshipi.e. (0001)ά, ‖(110)β; [•1120]ά ‖[•111]β. It is suggested that the ω phase may be an intermediate structure in the stress-induced bcc → hep transformation.
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R. R. AHRENS, formerly Research Assistant in the Department of Materials Science and Engineering, Cornell University
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Kuan, T.S., Ahrens, R.R. & Sass, S.L. The Stress-induced omega phase transformation in Ti-V alloys. Metall Trans A 6, 1767–1774 (1975). https://doi.org/10.1007/BF02642306
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DOI: https://doi.org/10.1007/BF02642306