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Evaluation of the microstructure, secondary dendrite arm spacing, and mechanical properties of Al–Si alloy castings made in sand and Fe–Cr slag moldsI.Narasimha Murthy,J.Babu RaoDepartment of Metallurgical Engineering,Andhra University摘 要:The microstructure and mechanical properties of as-cast A356(Al–Si) alloy castings were investigated. A356 alloy......
Microstructures and hardness of Ti-6Al-4V alloy staging castings under centrifugal field SUI Yan-wei(隋艳伟)1, LI Bang-sheng(李邦盛)1, LIU Ai-hui(刘爱辉)1, NAN Hai(南 海)2, GUO Jing-jie(郭景杰)1, FU Heng-zhi(傅... increase the filling and feeding ability of liquid metal during the solidification, decrease shrinkage cavity, shrinkage porosity, and porosity to obtain sound castings with high density, enhance freezing......
path becomes longer. The cyclic temperature variation at the node of the formed part causes interlayer remelting between the adjacent two layers. The thin-wall metal part can be realized by using...-dimensional direct writing; nozzle; temperature field; thin-wall part 近年来,增材制造技术取得了快速发展.金属材料增材制造作为整个增材制造技术体系中最为前沿且最具潜力的技术,是先进制造技术的重要发展方向.经过20多年的发展,金属材料增材制造技术的种类已达到10多种,可加工金属材料种类主要包括工具钢,不锈钢,钛合金,铝合金,镍基合金,钴铬合金,铜基......
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THE ADAPTIVE FINITE ELEMENT REMESHING IN LARGE DEFORMATION OF METAL FORMING X.X.Guo1,J.S.Liu2 (1.Advanced Manufacturing Technology and Engineering Department, Shenzhen Polytechnic, Shenzhen 518055,China;2.School of Material Science and Engineering, Taiyuan Heavy Machinery Institute, Taiyuan 030024, China) Abstract:The adaptive remeshing technique for quadrilateral elements consists of modules......
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Study on the preparation process of large particle cerium oxide马莹1,2,王宝荣1,李莉娜3,乔军1,2,苏允兰3,王笃金3,王晶晶1,21. National Engineering Research Center of Rare Earth Metallurgy and Functional Materials2. Baotou Research Institute of Rare Earths3. Institute of Chemistry,Chinese Academy of Sciences摘 要:The large particle cerium oxide was prepared using oxalic acid......
Study on the preparation process of large particle cerium oxide马莹1,2,王宝荣1,李莉娜3,乔军1,2,苏允兰3,王笃金3,王晶晶1,21. National Engineering Research Center of Rare Earth Metallurgy and Functional Materials2. Baotou Research Institute of Rare Earths3. Institute of Chemistry,Chinese Academy of Sciences摘 要:The large particle cerium oxide was prepared using oxalic acid......
Large magnetic-field-induced strains in rare earth polycrystalline Ni-Mn-GaZHAO Zengqi, WU Shuangxia, WANG Fangshu, WANG Qiang, JIANG Liping, and WANG Xinlin 1) Baotou Research Institute of Rare...-field-induced strains (MFIS) of polycrystalline Ni50Mn29Ga21 alloys containing Tb were studied. A large MFIS of-1.10% was obtained under compressive prestress conditions. The addition of Tb can fine......
field zone. Key words: earth-ionosphere mode; large power; large offset; electromagnetic field; forward modeling 1 Introduction In communication area, extremely low frequency (ELF), electromagnetic waves 3 Hz-3 kHz were generally used for long-range communication and navigation with submarines due to their comparatively large skin depths in salt water and low attenuation. This technology can also......
