共搜索到58317条信息,每页显示10条信息,共5832页。用时:0小时0分0秒379毫秒
Solute trapping model based on solute drag treatment WANG Hai-feng(王海丰), LIU Feng(刘 峰), CHEN Zheng(陈 正), YANG Wei(杨 伟) State Key Laboratory of Solidification Processing, Northwestern...; Abstract: A solute trapping model is developed based on a so-called solute drag treatment. By adopting a basic approach of phase-field......
低碳Nb微合金钢中Nb溶质拖曳和析出相NbC钉扎对再结晶晶粒长大的影响付立铭1,单爱党1,王巍2(1.上海市上海交通大学材料科学与工程学院2.宝山钢铁股份有限公司研究院)摘 要:通过理论计算并结合实验研究了低碳Nb微合金钢中NbC析出相与Nb固溶原子共同作用对再结晶后奥氏体晶粒长大的影响.结果表明,Nb的溶质原子拖曳与NbC析出相钉扎共同作用阻碍晶粒长大晶界的迁移,高温时NbC析出相的钉扎起主要作用,Nb的溶质拖曳效应并不明显,而相对低温时Nb拖曳对晶粒长大产生明显地抑制作用,理论计算与实验结果吻合良好;溶质原......
Drag Effects of Solute and Second Phase Distributions on the Grain Growth Kinetics of Pre-Extruded Mg-6Zn AlloyZhaoyang Jin,Donghua Yu,Xintong Wu,Kai Yin,Kai YanCollege of Mechanical Engineering... with solute and second phase distribution were investigated.Isothermal annealing was conducted on a Gleeble-1500 thermo-mechanical simulator.The mean grain size Dg of each annealed specimen......
J. Cent. South Univ. Technol. (2008) 15(s1): 329-332 DOI: 10.1007/s11771-008-374-3 Agitator tank device and drag reduction agent evaluation ZHANG Fan(张 帆)1, 2, XIAO Bo-yuan(肖博元)1, TANG... agitator for evaluation drag reduction agents (DRA) was established. The effect of DRA was defined by testing the changes of agitator torque that drives the disk rotation. The HG-DRA for oil pipeline from......
......
, JACKSON K A. Monte Carlo modeling of dopant segregation [J]. Journal of Crystal Growth, 2004, 271: 495-512. [20] LI S, ZHANG J, WU P. Numerical solution and comparison to experiment of solute drag... solidification of non-dilute alloys [J]. Journal of Crystal Growth, 2010, 312: 982-988. [22] WANG H, LIU F, CHEN Z, YANG W. Solute trapping model based on solute drag treatment [J]. Transactions......
J. Cent. South Univ. Technol. (2009) 16: 0166-0171 DOI: 10.1007/s11771-009-0028-0 Formation mechanism of aerodynamic drag of high-speed train and some reduction measures TIAN Hong-qi(田红旗)1, 2...; Abstract: Aerodynamic drag is proportional to the square of speed. With the increase of the speed of train, aerodynamic drag plays an important role for high-speed train. Thus, the reduction......
J. Cent. South Univ. (2020) 27: 1334-1350 DOI: https://doi.org/10.1007/s11771-020-4370-6 Numerical investigation of influence of pantograph parameters and train length on aerodynamic drag of high... the influence of different pantograph parameters and train length on the aerodynamic drag of high-speed train by the delayed detached eddy simulation (DDES) method. The train geometry considered is the high......
......
......