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低周疲劳表面裂纹演化进程分析 孙训方1,孙道恒2,刘先斌1 (1.西南交通大学应用力学与工程系,四川 成都 610031;2.厦门大学机电工程系,福建 厦门 361005) 摘要:低周疲劳表面裂纹演化可能具有非线性动力学特征.对1Cr18Ni9Ti光滑试样进行了低周疲劳实验,在对裂纹进行分类的基础上,将裂纹演化划分为多裂纹相互作用和局域主裂纹控制两个阶段.从非线性动力学角度给出了短裂纹的新的定义.指出裂纹演化两个阶段对材料疲劳损伤破坏过程的贡献. 关键词:低周疲劳; 短裂纹; 非线性动力学; 分岔; low cycle fatigue; short crack; non-linear dynamics; bifurcation; [全文内容正在添加中] ......
溶锌浸出率达到89.14%,浮选精矿锌的浸出率为79.75%,杂质元素的净化率达到95%,电解锌纯度达到99.98%,电流效率可达97.02%. 关键词:低品位锌矿；Zn；浮选精矿；电沉积；MACA体系；循环浸出 中图分类号:TF813 Cycle leaching of low grade zinc oxide ores in MACA system for ...: The low grade zinc oxide ores from Lanping in Yunnan Province were treated through cycle leaching in MACA(Metal-ammonium-chloride-ammonia) system at room temperature and pressure. The residue......
:TG146.2 文献标志码:A High cycle fatigue of TG6 alloy LI Juan, CAI Jian-ming, DUAN Rui, HUANG Xu (Beijing Institute of Aeronautical Materials, Beijing 100095, China) Abstract: The high cycle fatigue (HCF) of TG6 titanium alloy was investigated under the condition of different stress concentration factor (Kt) at 600 ℃. In addition, the fatigue fracture surfaces of the alloy were......
:1672-7207(2012)06-2445-09 Soil-water characteristic curve for unsaturated loess soil considering density and wetting-drying cycle effects ZHAO Tian-yu1, WANG Jin-fang2 (1. Key Laboratory of Mechanics... entry value and residual water content were suggested. The effects of dry density and wetting-drying cycle on the SWCC were analyzed through both experimental data and microstructure, and the measured......
热轧计算机管理与控制系统(上)王文瑞1,杨建中1,唐清荣1(1.上海市宝山钢铁股份有限公司)摘 要:介绍宝山钢铁股份有限公司不锈钢事业部1780热轧工艺特点,对管理与控制的要求及其实现的方法,主要包括:炼钢,连铸,热轧一体化计划的编制思想和方法,即在一体化计划执行过程中板坯库的收发存管理,加热炉的装钢和抽钢顺序控制与管理以及碳钢,不锈钢混合轧制生产的模型控制思想及实现;质量管理的PDCA循环;在热轧与冷轧紧凑布置而导致热轧与冷轧前库之间物流极其复杂的情况下,钢卷库管理的特点及实现等.关键词:一体化......
; directionally solidified superalloy; low cycle fatigue; microstruture; MC carbide; fracture; [全文内容正在添加中] ......
Life cycle inventory for base metal ingots production in Japan including mining and mineral processing processes by cost estimating system database T. ADACHI1, G. MOGI2 1. Department of Materials...; 1 Introduction Life Cycle Assessment (LCA......
Viscoelast-oplasticity model and numerical analysis of reinforcement engineering under cycle loadKUANG Xilong1, 2, ZHOU Zhigang1, LI Yuzhou1(1. Key Laboratory of Highway Engineering of Ministry of Education... deformation responding of reinforcement engineering of viscoelast-oplasticity model by comparing viscoelasticity model under cycle load, the viscoelasticity model of three parameters (E1, E2, η) was changed......
75% for battery using common conductive agent, and it has smaller interface impedance. Key words: LiFePO4; CNTs; conductive agent; rate performance; cycle performance; AC impedance 橄榄石型结构的LiFePO4能可逆...道,改善了电池的循环性能. 图7 不同导电剂电池的循环性能 Fig.7 Cycle performance of different conductive agent battery 为了进一步研究容量衰减的原因,将循环后的电池放电至2.2 V,然后在手套箱中拆开,刮取正极料,用EC+DEC(体积比为1?1)进行清洗,烘干,进行XRD分析. 图8所示为不同导电剂......
类号:TF813 文献标志码:A Cycle leaching of low grade zinc oxide ores in MACA system TANG Mo-tang, ZHANG Jia-liang, WANG Bo, YANG Sheng-hai, HE Jing, TANG Chao-bo, YANG Jian-guang...(Ⅱ)-NH4Cl-NH3-H2O(MACA) were studied. The technical process of enriching the concentration of zinc in lixivium by cycle leaching was proposed. The results show that the optimal conditions are found......
