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Effect of droplet heat content distribution on humping formation in high speed GMAWJi CHEN 1,3) and Chuansong WU 1,2) 1) MOE Key Laboratory for Liquid-Solid Structure Evolution and Materials... of droplet heat content distribution modes are proposed and employed to calculate the transient evolution of the temperature field and weld pool during high speed GMAW process. Through making comparison......
) and transmission electron microscopy (TEM) were used to investigate effect of electropulsing on microstructure and texture evolution of Ti-6Al-4V during cold drawing. Research results demonstrate... evolution between conventional cold drawing and EPT cold drawing indicates that the EPT promotes prismatic ＜a＞ slip moving, restricts pyramidal ＜c+a＞ slip occurring and accommodates the deformation with c......
of AP-QDEA are set as follows: The population size N is 30, the initial rotation angle θ0 is 0.4π, the evolution scale γ is 0.05, s is 10, the scaling factor F is 0.5, the crossover factor C is 0.4..., the problem of trajectory planning is transformed to parameter optimizing, and then auxiliary population-based quantum differential evolution algorithm (AP-QDEA) is applied as a tool to optimize......
, the influence of numerous parameters, including the initial temperature of workpieces, the roll speed, the forming angle, and the spreading angle, on the grain size and the grain-size uniformity of the rolled...Influence of process parameters on the microstructural evolution of a rear axle tube during cross wedge rollingJia-wei Ma,Cui-ping Yang,Zhen-hua Zheng,Kang-sheng Zhang,Wen-yu MaSchool of Mechanical......
, it can also be found that the apparent activation energy decreases with the increase of strain when the initial content of d phase is 12.09%. This phenomenon may result from the evolution of d phase...Effects of initial δ phase (Ni3Nb) on hot tensile deformation behaviors and material constants of Ni-based superalloy Yong-cheng LIN1,2,3, Min HE1,3, Ming-song CHEN1,3, Dong-xu WEN1,3, Jian CHEN4 1......
Configuration evolution of Aln(n=3,4,6,13,19) clusters studied using linear synchronous transit method PENG Ping(彭 平), LI Gui-fa(李贵发), YANG Feng (杨 峰), TIAN Ze-an(田泽安) ZHENG Cai-xing(郑采星), HAN Shao-chang(韩绍昌) School of Materials Science and Engineering, Hunan University, Changsha 410082, China Received 10 April 2006; accepted 25 April 2006 Abstract: The evolution......
strain of aluminum alloy plate during snake hot rolling, several coupled thermo-mechanical finite element models (FEM) are established. Effects of speed ratio and offset distance on strain distribution... symmetrical rolling in deformation zone. The results show that the equivalent strain and shear strain of lower part both increase with the increase of speed ratio, while the upper part decreases......
; Effect of ultrasonic power and casting speed on solidification structure...-continuous casting were researched, and the effects of casting speed on solidification structure in ultrasonic field were also analyzed. The experiment and simulation results show that the solidification......
and PL spectra intensity are achieved with the O2 evolution speed of 480 μmol/(L?h) and 78 μmol/(L?h) under UV irradiation and visible radiation respectively when the Nb5+ concentration was 1.0 mol%, which... to the concentration of Fe3+ as electron acceptor, the best initial concentration of Fe3+ is 8.0 mmol/L Key words: Nb5+-doped; rutile titania; photocatalytic; O2 evolution 1972年日本科学家FUJISHIMA[1]等通过......
J. Cent. South Univ. (2021) 28: 2472-2484 DOI: https://doi.org/10.1007/s11771-021-4780-0 Evolution of anisotropy during sandstone rockburst process under double-faces unloading LIU Dong-qiao(刘冬桥)1.... To find a characteristic precursor for rockburst, the dynamic evolution of rock anisotropy during the rockburst test is quantified by the anisotropic coefficient k, defined as the ratio of the two P......
