Journal
MATERIALS CHARACTERIZATION
Volume 106, Issue -, Pages 302-307Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2015.06.008
Keywords
Ti-Mo; Omega phase; Elastic modulus
Categories
Funding
- National High Technology Research and Development Program [2013AA031103]
- National Natural Science Foundation of China [51301205]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20130162120001]
- Changsha Municipal Science and Technology Plan [K1406012-11]
- Innovative Technology Research and Development Program of Shenzhen [CXY201107010187A]
- Project of Technological Innovation & Entrepreneurship Platform for Hunan Youth
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In this work, a series of binary Ti-Mo alloys with the Mo contents ranging from 3.2 to 12 at% were prepared using non-consumable arc melting. The microstructures were investigated by X-ray diffraction and transmission electron microscope, and the elastic modulus was evaluated by nanoindentation testing technique. The evolution of the volume fractions of omega phase was investigated using X-ray photoelectron spectroscopy. The results indicated that the phase constitution and elastic modulus of the Ti-Mo alloys are sensitive to the Mo content. Ti-3.2Mo and Ti-8Mo alloys containing only alpha and beta phases, respectively, have a low elastic modulus. In contrast, Ti-4.5Mo, Ti-6Mo,Ti-7Mo alloys, with different contents of omega phase, have a high elastic modulus. A simple micromechanical model was used to calculate the elastic modulus of omega phase (E-omega), which was determined to be 174.354 GPa. (C) 2015 Elsevier Inc. All rights reserved.
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