Hydrodynamic Effects on Surface Morphology Evolution of Titanium Alloy under Intense Pulsed Ion Beam Irradiation  

作　　者：董艇舰 荣翠华 梁家昌 刘波 赵小勇 陈董燕 张彬 王浩 李海波 张世贵 蒋玉平 罗兵 周小文 王涛 喻晓 乐小云 

机构地区：[1]Engineering Technology Training Center, Civil Aviation University of China, Tianjin 300300 [2]School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191 [3]Sichuan Chengfa Aero Science and Technology Co. Ltd, Chengdu 610000 [4]School of Space and Environment, Beihang University, Beijing 100191

出　　处：《Chinese Physics Letters》2017年第5期84-87,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 1175012;the China Postdoctoral Science Foundation under Grant No 2016M600897;the National Science and Technology Major Project of the Ministry of Science and Technology of China under Grant No 2013ZX04001-071

摘　　要：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.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.

关 键 词：Hydrodynamic Effects on Surface Morphology Evolution of Titanium Alloy under Intense Pulsed Ion Beam Irradiation 

分 类 号：TG146.23[一般工业技术—材料科学与工程]