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the amorphization bring into effect. With the laser power increasing, the interval between the maximum temperature and the liquid line becomes larger. This gives the molten pool sufficient time to achieve homogeneity. When the liquid bath begins to solidify, the homogeneous pool will freeze to amorphous phase under high cooling rate. On the other hand, exorbitant laser power densities do not agree......
of liquid phase of polymers, ws is the mass fraction of solid phase and φm is a critical volume fraction at which the mixture has the infinite viscosity. 3.2 Optimal laser sintering parameters...Article ID: 1003-6326(2005)02-0261-05 Selective laser sintering of polymer-coated Al2O3/ZrO2/TiC ceramic powder BAI Pei-kang(白培康), CHENG Jun(程 军), LIU Bin(刘 斌) (Department of Materials......
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Influence of laser energy input mode on joint interface characteristics in laser brazing with Cu-base filler metal LI Li-qun(李俐群), FENG Xiao-song(封小松), CHEN Yan-bin(陈彦宾) State Key Laboratory... brazed with CuSi3 as filler metal at different laser heating modes. The microstructures and element distributions of joint interface were investigated by SEM and EDS. The results show......
Structure and erosion resistance of Ni60A/SiC coatting by laser cladding LOU Bai-yang(楼白杨), CHEN Zhen(陈 阵), BAI Wan-jin(白万金), DONG Gang(董 刚) MOE Key Laboratory of ...; Abstract: The Ni60A and Ni60A/SiC coatings were obtained by laser cladding on 0.45% C steel......
the time of metallic liquid phase existing, and to improve the intensity and accuracy of SLS part. For this reason, SHS material''s interaction with the C02 laser beam energy is researched, which...IGNITING SHS BY LASER AND ITS APPLICATION TO SELECTIVE LASER SINTERING OF METALLIC POWDER MATERIAL S.H.Huang1,S.C.Chen1,Y.S.Shi1,X.L.LU1 (1.State Key Laboratory of Plastic Forming Simulation......
Numerical simulation of thermal behavior during laser metal deposition shaping LONG Ri-sheng(龙日升)1, 2, LIU Wei-jun(刘伟军)1, XING Fei(邢 飞)1, 2, WANG Hua-bing(王华兵)1, 2 1. Advanced Manufacturing...; Abstract: Based on the element life and death theory of finite element analysis(FEA), a three-dimensional multi-track and multi-layer model for laser metal deposition shaping(LMDS) was developed......
treatment of powders [J]. Rapid Prototyping Journal, 2004, 10(2): 78-87. [13] NIU H J, CHANG I T H. Liquid phase sintering of M3/2 high speed by selective laser sintering [J]. Scripta Materialia, 1998... Selective laser sintering mechanism of polymer-coated molybdenum powder BAI Pei-kang(白培康), WANG Wen-feng(王文峰) School of Materials Science and Engineering, North University of China, Taiyuan......
Microstructure of nanometer Al2O3 dispersion strengthened Ni-based high-temperature protective coatings by laser cladding WANG Hong-yu(王宏宇)1, 2, ZUO Dun-wen(左敦稳)1, SUN Yu-li(孙玉利)1, XU Feng(徐 锋)1... by crosscurrent CO2 laser on Ni-based superalloy GH4033 were produced. Microscopic morphologies, phase constitutions of cladding coatings and distribution of nano-Al2O3 particles were examined using SEM and XRD......
CO2 laser welding of 5A06 aluminum alloy plates with different thicknesses YU Shu-rong(余淑荣)1, 2, FAN Ding(樊 丁) 1, 2, XIONG Jin-hui(熊进辉)1, CHEN Jian-hong(陈剑虹)1, 2 1. State Key Laboratory... of Technology, Lanzhou 730050, China Received 28 July 2006; accepted 15 September 2006 Abstract: CO2 laser beam welding of aluminum alloys with different thicknesses was carried out. The influences......