Quantitative strengthening evaluation of powder metallurgy titanium alloys with substitutional zr and interstitial o solutes via homogenization heat treatment
Journal article
Authors/Editors
Strategic Research Themes
Publication Details
Author list: Kondoh K., Kariya S., Khantachawana A., Alhazaa A., Umeda J.
Publisher: MDPI
Publication year: 2021
Volume number: 14
Issue number: 21
ISSN: 1996-1944
Languages: English-Great Britain (EN-GB)
View in Web of Science | View on publisher site | View citing articles in Web of Science
Abstract
The decomposition behavior of ZrO2 particles and uniform distribution of Zr and O solutes were investigated by employing in situ scanning electron microscope-electron backscatter diffraction (SEM-EBSD) analysis and thermogravimetric-differential thermal analysis (TG-DTA) to optimize the process conditions in preparing Ti-Zr-O alloys from the pre-mixed pure Ti powder and ZrO2 particles. The extruded Ti-Zr-O alloys via homogenization and water-quenching treatment were found to have a uniform distribution of Zr and O solutes in the matrix and also showed a remarkable improvement in the mechanical properties, for example, the yield stress of Ti-3 wt.% ZrO2 sample (1144.5 MPa) is about 2.5 times more than the amount of yield stress of pure Ti (471.4 MPa). Furthermore, the oxygen solid-solution was dominant in the yield stress increment, and the experimental data agreed well with the calculation results estimated using the Hall-Petch equation and Labusch model. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Keywords
Powder metallurgy Ti-Zr-O alloy, Solid-solution, Water-quenching
Contact Information