Growth and Deformation Mechanisms of Refractory Alloy Hybrid Materials.
Abstract
Oxide-dispersion-strengthened and whisker/particulate reinforced titanium and niobium alloys produced by rapid solidification processing are being investigated with the objectives of understanding the mechanisms of formation and growth of the secondary phases and how these factors determine strengthening mechanisms and thermal stability of Ti and Nb alloys. During the first year of the three-year program, Titanium alloys containing Aluminum, Erbium, Boron, and Carbon, and Nb alloys containing Tungsten, Hafnium, Lanthanum, B, and C were prepared by nonconsumbable electrode arc melting and microstructures were characterized. The alloys were rapidly solidified by electron beam melting and splat quenching and the rapidly solidified flakes were characterized by x-ray diffraction, optical metallography, and electron microscopy. The mechanical properties of rapidly solidified Ti alloys containing Er, B, and C were determined by tensile testing of specimens prepared from electron-beam-melted and splat-quenched flakes. Keywords: Hybrid materials, Refractory materials, Oxide dispersions, In-situ composites, Deformation mechanisms, Work hardening.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1987
- Accession Number
- ADA190492
Entities
People
- B. D. London
- D. M. Bowden
- J. E. O'neal
- R. J. Lederich
- S. M. Sastry