Microstructure and tensile properties of Y2O3-dispersed titanium produced by arc melting

✍ Scribed by V. de Castro; T. Leguey; A. Muñoz; M.A. Monge; R. Pareja

• Book ID: 103841274
• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 870 KB
• Volume: 422
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2006.02.027

✦ Synopsis

Y 2 O 3 -dispersed titanium with Y 2 O 3 content ranging between 0.3 and 0.7 wt% was produced by an arc-melting technique starting from Ti and Y 2 O 3 . Compositional and microstructural characterization was performed by XRD, SEM and TEM for as-cast, forged and recrystallized samples. A uniform nanodispersion of Y 2 O 3 particles with sizes <100 nm was found for all the alloys. These particles coarsened and tended to be aligned as the Y 2 O 3 content rose and the alloy was forged, and their shape became more spherical after cold rolling and subsequent recrystallization. TEM observations also revealed that dislocations were pinned by Y 2 O 3 particles. Tensile tests were performed at 298 K for forged alloys and at 298, 498 and 773 K for recrystallized alloys. The Y 2 O 3 nanodispersion effectively strengthened these materials.