Microstructure and tensile properties of a Ti-28Ta alloy studied by transmission electron microscopy and digital image correlation |
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| Affiliation: | 1. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, PR China;2. State Key Laboratory of Porous Metal Materials, Northwest Institute for Non-ferrous Metal Research, Xi''an, Shaanxi 710016, PR China;3. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, PR China;1. Islamic Azad University, Saveh Branch, Saveh, Iran;2. Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran;3. Materials and Energy Research Center, Karaj, Iran;4. Department of Mechanical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran;1. Centre of Excellence in Hypersonics, Indian Institute of Science, Bangalore, India;2. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kanpur, India;3. Materials Research Centre, Indian Institute of Science, Bangalore, India;4. Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, India;1. Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea;2. Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden 80401, USA;3. Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea;1. Faculty of Engineering, China University of Geosciences, Wuhan, Hubei 430074, China;2. Guilin Diamond Industry Co.,Ltd., Guilin, Guangxi 541199, China |
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| Abstract: | This work presents a study of tensile behavior for a Ti-28 at.%Ta alloy with low modulus and remarkable superelasticity. The Ti-28Ta alloy was firstly fabricated by melting the Ti/Ta powder mixture, followed by hot swaging. The microstructure and tensile behavior were examined by X-ray diffraction, optical microscopy, scanning electron microscopy, transmission electron microscopy and digital image correlation. The results show that the as-fabricated Ti-28Ta alloy is consisted of β with minor nano-sized martensitic α″ and athermal ω. The yield strength and tensile strength of the Ti-28Ta alloy are 549.4 ± 17.0 and 673.8 ± 78.2 MPa, while its fracture elongation and Young's modulus reach to 28.55 ± 2.19% and 89.9 ± 6.1 GPa, respectively. The static and cyclic stress–strain tensile behaviors of the Ti-28Ta alloy were investigated. The results demonstrate that the Ti-28Ta alloy exhibits ductile and transgranular fracture behavior, excellent superelasticity and remarkable ductility. |
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