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average output power, and 1 kHz repetition rate. The linearly polarized laser beam with a Gaussian profile is focused tightly onto the planar hybrid germanium-silica plate through an objective lens (X60...Trans. Nonferrous Met. Soc. China 22(2012) s808-s812 Internal modification in transparent hybrid germanium-silica plates using plasma formation induced by a femtosecond laser Ji-Wook YOON 1, Jung-Kyu......
electron microscope (SEM). And the effect of processing parameters including laser power and welding speed on the welding quality was researched. The results show that the ZK60 magnesium alloy can be joined successfully by CO2 laser welding process under the condition of this experiment. Laser power and welding speed have the important influence on the weld seam, and the joint ultimate tensile......
, surface of the PDI is alloyed with WC-12%Co powder using a high power fibre laser. The wear properties of the base material and laser alloying samples were investigated by tribometer with various... parameter. CAYDAS et al [32] examined the cutting input parameters by Grey combined Taguchi method and stated that laser power has higher impact than laser cutting speed. TSAO [33] investigated......
., Ltd. Table 1 Chemical composition of 7075 aluminum alloy (wt.%) The technological parameters used in the LENS process are as follows: laser power is 1400 W; scanning speed is 800 mm/min; powder... by laser additive manufacturing and forging technology ZHANG Jin-liang(张金良)1, YE Jie-liang(叶界梁)1, SONG Bo(宋波)1,LI Rui-di(李瑞迪)2, SHI Yu-sheng(史玉升)1 1. State Key Laboratory of Materials Processing and Die......
on the chirped pulse amplification technique with a 130 fs pulse duration, 3.5 W maximum output power, and 1 kHz repetition rate. The linearly polarized laser beam with a Gaussian profile was focused tightly... Optical diffraction gratings embedded in BK-7 glass by low-density plasma formation using femtosecond laser Jung-Kyu PARK1, Sung-Hak CHO1, Kwang-Ho KIM2, Myung-Chang KANG2 1. Nano Machining......
Effect of post-weld heat treatment on microstructure and properties of Ti-23Al-17Nb alloy laser beam welding joints WANG Guo-qing(王国庆), WU Ai-ping(吴爱萍), ZHAO Yue(赵 玥), ZOU Gui-sheng(邹贵生), CHEN...; Abstract: The mechanical properties of Ti-23Al-17Nb (mole fraction, %) laser beam welding alloy joint at room temperature are comparable to that of the base materials. However......
progresses in LMI has been made and many kinds of particles reinforced MMCs were produced[8-9]. In the LMI process, a high power laser locally melts the top part of a metal substrate. At the same time... beam, which was named as pre-feeding mode. The powder feeding nozzle was aligned at the back of the laser beam, which was named as back-feeding mode. Under the condition of laser power density P=300......
) was used to protect the molten pool and heat affected zone (HAZ). The flow rate was 28 L/min. The parameters for laser welding were laser power, P=6 kW; welding velocity, v=2.0 m/min, v=1.6 m/min, v=1.4... Trans. Nonferrous Met. Soc. China 22(2012) 2118-2123 Microstructure characterization of Ti-6Al-4V titanium laser weld and its deformation XU Pei-quan College of Materials Engineering, Shanghai......
diffraction measurement. The substrate to target distance was kept to be 4 cm and substrate heating was carried out using a heater, and the temperature was controlled with DC power supply. The laser... using charge- coupled device (CCD) with laser power of 9 mW and incident laser power focused in a diameter of 2 μm. Notch filter was used to suppress the Reighley light. 3 Results and discussion Fig.1......
