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ABSTRACT
Ti–1Al–8V–5Fe (Ti-185) is a unique low-cost β-Ti alloy, containing lower cost alloying elements, notably Fe, as compared to Ti–10V–2Fe–3Al (Ti-1023) and Ti–5Al–5V–5Mo–3Cr (Ti-5553) while offering high strength. However, with higher Fe content (>5 at.-%), the ‘β-flecks’ are prone to form because strong segregation in traditional casting, which seriously deteriorates the mechanical properties of the alloys. In this work, Spark plasma sintering (SPS) was successfully used to produce Ti-185 components starting from elemental Ti and Al powders, and a V–Fe master alloy powder with different particle size (106, 45, and 23 μm). SPS can be used to produce a very fine grain microstructure with decreasing particle size master alloy powder and non-detrimental Fe segregation, and which result in a significant improvement of the mechanical properties. As the particle size of the FeV80 powder decreases, the compressive strength, yield strength and compressive strain of the alloy gradually increase.
Acknowledgements
This research was funded by the National Natural Science Foundation of China (No. 51671152, No. 51874225, No. 51504191), Science and technology plan project of Shaanxi Province (No.2020ZDLGY13-10), Natural Science Basic Research Program of Shaanxi (Program No.2020JM-455), Xi'an Science and technology plan project (No.2020KJRC0048).
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No potential conflict of interest was reported by the author(s).
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Notes on contributors
Xin Yang
Xin Yang holds a PhD in materials science from Central South University and is an associate professor in the School of Materials Science and Engineering, Xi'an University of Technology. His current research interests include titanium alloys, powder metallurgy, metal additive manufacturing, and surface treatment.
Zhaoyang Zhang
Zhaoyang Zhang is a graduate student at the School of Materials Science and Engineering, Xi'an University of Technology. His current research focuses on selective laser melting of Titanium alloys.
Ben Wang
Ben Wang is a graduate student at the School of Materials Science and Engineering, Xi'an University of Technology. His current research focuses on selective laser melting of Tantalum alloys.
Yunzhe Li
Yunzhe Li is a PhD student at the school of Xi'an University of Architecture and Technology, is currently mainly engaged in the research of additive manufacturing mechanism of lightweight high-strength steel and the development of metal matrix composite.
Gang Liu
Gang Liu holds PhD in materials science from Northwestern Polytechnical University and is an associate professor in the School of Materials Science and Engineering, Xi'an University of Technology. He mainly studies superalloys and high-entropy alloys.
Yan Wang
Yan Wang is an associate professor at Xi’an University of Architecture & Technology. He received his PhD degree in materials processing engineering from University of Technology of Belfort-Montbéliard. His research interests focus on the design of powder materials, 3D printing and coating technology.
Guangxi Zhang
Guangxi Zhang holds master degree in materials engineering from Xi’an University of Architecture and Technology. He is an engineer in HBIS Industrial Technology Service Co., Ltd., HBIS Group. His current research interests include atomization comminuting process and powder metallurgy.
Shifeng Liu
Shifeng Liu holds a PhD in materials engineering from Xi’an University of Architecture and Technology, is a professor in the School of Xi’an University of Architecture and Technology. He mainly researches titanium and titanium alloy, high-entropy alloy, cemented carbide, special steel and other metal 3D printing powder raw materials design, forming equipment preparation, material technology and performance research.