CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Hydrodynamic Effects on Surface Morphology Evolution of Titanium Alloy under Intense Pulsed Ion Beam Irradiation |
Ting-Jian Dong1, Cui-Hua Rong2, Jia-Chang Liang1, Bo Liu3, Xiao-Yong Zhao3, Dong-Yan Chen3, Bin Zhang3, Hao Wang1, Hai-Bo Li3, Shi-Gui Zhang3, Yu-Ping Jiang3, Bing Luo3, Xiao-Wen Zhou3, Tao Wang1, Xiao Yu2,4**, Xiao-Yun Le2** |
1Engineering Technology Training Center, Civil Aviation University of China, Tianjin 300300 2School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191 3Sichuan Chengfa Aero Science and Technology Co. Ltd, Chengdu 610000 4School of Space and Environment, Beihang University, Beijing 100191
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Cite this article: |
Ting-Jian Dong, Cui-Hua Rong, Jia-Chang Liang et al 2017 Chin. Phys. Lett. 34 056101 |
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Abstract The hydrodynamic effects of molten surface of titanium alloy on the morphology evolution by intense pulsed ion beam (IPIB) irradiation are studied. It is experimentally revealed that under irradiation of IPIB pulses, the surface morphology of titanium alloy in a spatial scale of μm exhibits an obvious smoothening trend. The mechanism of this phenomenon is explained by the mass transfer caused by the surface tension of molten metal. Hydrodynamic simulation with a combination of the finite element method and the level set method reveals that the change in curvature on the molten surface leads to uneven distribution of surface tension. Mass transfer is caused by the relief of surface tension, and meanwhile a flattening trend in the surface morphology evolution is achieved.
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Received: 15 January 2017
Published: 29 April 2017
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PACS: |
61.80.-x
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(Physical radiation effects, radiation damage)
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52.59.-f
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(Intense particle beams and radiation sources)
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74.25.Ha
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(Magnetic properties including vortex structures and related phenomena)
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47.61.-k
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(Micro- and nano- scale flow phenomena)
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Fund: Supported by the National Natural Science Foundation of China under Grant No 1175012, the China Postdoctoral Science Foundation under Grant No 2016M600897, and the National Science and Technology Major Project of the Ministry of Science and Technology of China under Grant No 2013ZX04001-071. |
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