Effect of aging on the tensile properties and microstructures of a near-alpha titanium alloy |
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| Affiliation: | 1. State Key Laboratory of Solidification Processing, School of Materials, Northwestern Polytechnical University, Xi’an 710072, China;2. Northwestern Institute for Nonferrous Metal Research, Xi’an 710016, China;1. School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China;2. Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA;3. School of Materials Science and Engineering, Beihang University, Beijing 100191, China;1. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, China;2. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, P.O. Box 433, Harbin 150001, PR China;2. School of Materials Science and Engineering, Harbin Institute of Technology, P.O. Box 433, Harbin 150001, PR China;1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi׳an 710072, China;2. Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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| Abstract: | The effect of aging temperature between 650 °C and 750 °C for different aging times on the tensile properties and microstructures of Ti60 alloy were studied. The results show that the strength of the alloy increases first and then decreases with the aging temperature increases from 650 °C to 750 °C. The reduction of area of the alloy is more sensitive to the aging time than elongation. With increasing aging temperature and time, the volume fracture and grain size of silicides and α2 phase increase gradually. The silicides have the strengthen effect on the Ti60 alloy, but the effect weakens when the silicides grow up. The loss of ductility is mainly attributed to the precipitation of α2 phase after aging treatment. |
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| Keywords: | Near-alpha titanium alloy Aging treatment Tensile properties Microstructure |
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