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NUMERICAL SIMULATION OF HEATING AND QUENCHING PROCESSES FOR A 280 CONNECTING ROD OF 16V280ZJ DIESEL LOCOMOTIVE

J.S. Ye , Z.R. Ye , A. Yang

金属学报(英文版)

A modified temperature-phase transformation-stress coupled 3D non-linear mathemat-ical model and a series of subroutines on the non-liner MARC (MARC Analysis Re-search Corporation) are developed. Then this modified model has been utilized to simu-late the heat treatment processes of 280 connecting r...

关键词: non-linear , null , null , null

Semiconducting properties of passive film formed on stainless steel by using A. V. passivation

Acta Chimica Sinica

Passive film formed on 304 stainless steel in 2.5 mol/L H2SO4 solution by using alternating voltage (A. V.) passivation have been investigated by measuring capacitance and photoelectrochemical parameters. The investigation of the effect of measure frequency on the slop...

关键词: A. V. passivation;passive film;semiconducting properties;stainless;steel;model;electrodes

EFFECT OF AN ELASTIC-PLASTIC SHOCK-WAVE .A. ON THE FATIGUE-STRENGTH OF WELDED-JOINTS

Fatigue & Fracture of Engineering Materials & Structures

Fatigue data for welded joints subjected to an explosion treatment (ET) were obtained using rotary bending fatigue specimens. The fatigue fracture surfaces were observed by SEM and the dislocation morphologies by TEM. Mechanical properties have been quantitively studied by considering elastic and pl...

关键词:

Modification of Analytical Expression of Electron Dynamical Diffraction

Canying CAI , Qibin YANG , Hongrong LIU

材料科学技术(英文)

Assuming that the wave function , the Schrodinger equation can be written as . Neglecting the last two terms, an analytical expression of electron dynamical diffraction was derived by Qibin YANG et al. In this paper, the analytical expression is modified by further con...

关键词: Electron dynamical diffraction , null

1998 COMPREHENSIVE TABLE OF CONTENTS

中国腐蚀与防护学报

N。1Atmospheric Corrosivlty for Steels………………………………………………… .LIANG Caideng HO[I i。-tat(6)Caustic Stress Corrosion Cr。king of Alloy 800 Part 2.The Effect ...

关键词:

Bi2-xPbxSr2Co2Oy单晶各向异性输运性质的研究

李慧玲 , 阮可青 , 王强 , 陈宇 , 钱朔 , 余勇 , 黄利 , 郑重 , 汪成友 , 曹烈兆

低温物理学报 doi:10.3969/j.issn.1000-3258.2003.04.007

研究了不同Pb含量的Bi2-xPbxSr2Co2Oy单晶的输运行为.用A. F. Ho 和A. J. Schofield提出的公式对ρc的温度依赖关系曲线进行了拟合,得到了较好...

关键词: 过渡金属氧化物的电导 , 小极化子

两步法制备Y_2O_3掺杂ZnO压敏瓷

徐东 , 巫欣欣 , 程晓农 , 张剑平 , 施利毅

材料导报

采用两步烧结制备了Y_2O_3掺杂ZnO压敏瓷,其电位梯度为863~1330V/mm,非线性系数为27.0~49.7,漏电流为0.55~1.13μA.研究结果表明,当Y_2C_3的掺杂量为1.00%(摩尔分数)时,压敏瓷电性能最好,电位梯...

关键词: 压敏瓷 , 两步烧结 , 稀土 , 显微组织 , 电性能

Spectral density for the tunneling current zero-frequency shot-noise in a one-dimentional mesoscopic system

Acta Physica Sinica

We have derived the expression of the spectral density for the current shot-noise in terms of the nonequilibrium Green's functions( closed-path Green's functions) for a. one-dimensional mesoscopic junction, and performed numerical calculations to discuss the dependence...

关键词: electron-electron scattering;quantum-dot;transient transport;anderson;model;conductors;barrier;equilibrium;contacts

连铸结晶器弯月面处保护渣的流动行为

颜慧成 , 郭征 , 张孟亭 , 张洪平

钢铁研究学报

引入变量m(冲量密度)和Yang-Mills型规范变换m=u+gradφ,将原始变量的N-S方程转化为规范-不变量形式,用自由质点法处理Voronoi元,对连铸结晶器弯月面处保护渣流动行为进行数学模拟.输出振动周期内的动态流场,然后结合一...

关键词: 连续铸钢 , 保护渣 , 流动行为 , 数学模拟

快速床动力学统一模型-由A型噎塞向C型噎塞的连续转变Ⅰ:模型构建

章明川 , 张楚 , 林郁郁 , 徐旭常

工程热物理学报

根据快速流化床的基本流动特性、A 型噎塞和 C 型噎塞的特征与定义,建立了一个统一,自恰的快速床模型一分相共存模型.模型以 A 型噎塞的修正Yang公式为‘本构方程',合理预报了快速床的最小固体流率Gsm,以及在固体流率不变的条件下降低操...

关键词: 快速流态化 , 噎塞速度 , A 型噎塞 , C 型噎塞 , 分相共存模型

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