Yttria Nanoparticle Reinforced Commercially Pure (CP) Titanium
Abstract
Previous literature reports have indicated as much as an approximately twofold increase in tensile properties in commercially pure (CP) titanium (Ti) following the introduction of yttria (Y2O3) nanoparticles. However, these initial studies used laboratoryscale samples produced via an arc-melting process. In order to evaluate the potential for scale-up, CP Ti powders containing both yttria nanoparticles as well as titanium boride (TiB) reinforcements were produced through gas atomization. After consolidation and extrusion, room temperature tensile tests were conducted to determine the influence of reinforcements on strength and ductility. Three alloy powders - CP Ti, CP Ti + 0.3% Y2O3, and CP Ti + 0.3% Y2O3 + 0.5 B were fabricated using a conventional Ti powder metallurgy route. Powder compacts were fabricated via hot isostatic pressing and billets were extruded to produce 12.7-mm-diameter bars. Room temperature testing indicated that the addition of 0.3% Y2O3 reduced the tensile strength by approximately 20%. The addition of both 0.5% B and 0.3% Y2O3 increased the tensile yield strength by 33% relative to CP Ti. The addition of 0.5% B increased the tensile modulus of CP Ti by 20%.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2011
- Accession Number
- ADA553480
Entities
People
- Sesh Tamirisa