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within the clad layer. The microhardness values of the coating are less than those of the heat-affected zone(HAZ). This is because that the laser heating is sufficient to austenitise the substrate... Laser engineered net shaping of Co-based superalloys XUE Chun-fang(薛春芳)1, DAI Yao(戴 耀)1, TIAN Xin-li(田欣利)2 1. Department of Mechanical Engineering, Academy of Armored Force Engineering, Beijing......
] during femtosecond laser irradiation of metals. In the first stage, the free electrons absorb the energy from the laser. This stage is characterized by a lack of thermal equilibrium among the electrons... different temperatures. In the final stage, the electrons and the lattice reach thermal equilibrium and thermal diffusion carries the energy into the bulk. A two-temperature model, which predicts the non......
Rapid fabrication and thermoelectric performance of SnTe via non-equilibrium laser 3D printingTian-Le Chen1,Chuang Luo1,Yong-Gao Yan1,Ji-Hui Yang2,Qing-Jie Zhang1,Ctirad Uher3,Xin-Feng Tang11. State... commercial applications. In this paper, using a non-equilibrium laser3 D printing technique, we focus an attention on the fabrication of mid-temperature p-type SnTe thermoelectric materials......
composite [14]. However, due to the complexity of oxide physical properties and the non-equilibrium of laser rapid solidification processing, the study on the effects of laser processing parameters... Moreover, laser zone remelting is a non-equilibrium solidification process. The asymmetry of the temperature field, the convection caused by the melt surface tension and gravity, and instability......
; (3) where r is the radius of the laser beam. Fig. 4 Shape of heat source at initial heating Fig. 5...J. Cent. South Univ. (2012) 19: 402-407 DOI: 10.1007/s11771-012-1018-1 Estimation of deformed laser heat sources and thermal analysis on laser assisted turning of square member KIM Jae-hyun, KIM......
rapidly heating and cooling in the material processing achieves the extreme non-equilibrium conditions, which makes the forming part with excellent comprehensive performance. On the other hand... by laser solid forming YANG Hai-ou(杨海欧)1, 2, ZHANG Shu-ya(张书亚)1, 2, LIN Xin(林鑫)1, 2,HU Yun-long(胡云龙)1, 2, HUANG Wei-dong(黄卫东)1, 2 1. State Key Laboratory of Solidification Processing, Northwestern......
Effect of temperature and heating rate on mechanical properties of magnesium alloy AZ31 YUAN Quan(袁 权)1, 2, CHEN Bin(陈 斌)1, 2, LUO Ji(罗 吉)1, 2, ZHANG Ding-fei(张丁非)3, QUAN Guo-zheng(权国政)3 1...; accepted 30 January 2010 Abstract: Effects of temperature and heating rate on the mechanical properties of the tensile specimens of magnesium alloy AZ31 were experimentally investigated using......
Simulation and prediction in laser bending of silicon sheet WANG Xu-yue, XU Wei-xing, XU Wen-ji, HU Ya-feng, LIANG Yan-de, WANG Lian-ji Key Laboratory for Precision and Non-traditional Machining..., WU Dong-jiang. Parameter prediction of bending of aluminum alloy sheet induced by laser prompt heating [J]. Opt Precision Eng, 2007, 15(6): 915-921. (in Chinese) [8] YANG Chao-jun, ZHOU Jian-zhong......
. At the same time, when a layer absorbed heat from the laser beam, the heat was quickly transferred to the next layer of the solidified substrate thereby promoting repeated heating and melting. Due... crystals. Therefore, the coexistence of intersections of three crystals and intersections of four crystals was evidence that the as-fabricated specimens would form a non-equilibrium microstructure due......
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 that there is no obvious interface layer with the circular individual beam heating and lamellar Fe-Si intermetallic compound layer is found with dual-beam laser spot heating. With the irradiation of rectangular laser......
