Radiation induced precipitation in 9 MeV Al ion irradiated Ti-6A1-4V |
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| Affiliation: | 1. College of Nuclear Equipment and Nuclear Engineering, Yantai University, Yantai 264005, PR China;2. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, PR China;3. State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, PR China;1. Department of Management and Engineering, Linköping University, Linköpings universitet, Linköping 58183, Sweden;1. School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA;2. Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3123, USA;3. MPA-CINT, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;4. Department of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 47907, USA |
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| Abstract: | The dominant irradiation response of several titanium alloy systems is the production of different phases. Previous studies have shown that a thermally unstable bcc,β, phase precipitates out in the hcp matrix during irradiation. In this paper, the extent of this phase separation in Ti-6A1-4V is examined as a function of temperature for low dose ion irradiations. The alloy Ti-6A1-4V was irradiated with 9 MeV Al ions to 2 dpa at a 2 μ depth over a 500–700°C temperature range. The densities of the radiation-induced β precipitates were found to decrease at high temperatures while the size increased. The original grain boundary β phase shows no radiation effect until 650°C when it undergoes a transformation to a Widmanstätten morphology. An EDS analysis of the radiation-induced β phase indicates it is 50% higher in vanadium when compared to the thermally predicted vanadium concentration. The total fraction of bcc phase present in the irradiated region is drastically altered. |
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