Electrically Assisted Ultrasonic Nanocrystal Surface Modification of Ti6Al4V Alloy |
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| Authors: | Jun Liu Sergey Suslov Shengxi Li Haifeng Qin Zhencheng Ren Gary L. Doll Hongbo Cong Yalin Dong Chang Ye |
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| Affiliation: | 1. Department of Mechanical Engineering, University of Akron, Akron, OH 44325, United States;2. Qatar Environment and Energy Research Institute (QEERI), Qatar Foundation, Doha, Qatar;3. Department of Chemical and Biomolecular Engineering, University of Akron, Akron, OH 44325, United States;4. The Timken Engineered Surfaces Laboratories, University of Akron, Akron, OH 44325, United States |
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| Abstract: | In this study, an innovative process, electrically assisted ultrasonic nanocrystal surface modification (EA‐UNSM), is used to process Ti6Al4V alloy. As compared with traditional UNSM, EA‐UNSM results in lower dislocation density and larger grains due to the thermal annealing effect caused by resistive heating. In addition, deeper plastic deformation layer is observed in the electrically assisted case. By supplying mechanical energy and thermal energy simultaneously, a strong dynamic precipitation effect is induced, which generates nanoscale precipitates in the EA‐UNSM‐treated Ti6Al4V alloy. These nanoscale precipitates can effectively pin dislocations during plastic deformation and thus significantly improve the surface hardness. |
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| Keywords: | Ultrasonic nanocrystal surface modification electrically assisted deformation severe plastic deformation nanocrystalline dynamic precipitation |
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