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cycle fatigue of metal materials SONG Ya-nan XU Bin-shi, WANG Hai-dou, XING Zhi-guo (National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, China) Abstract: The very high cycle fatigue (VHCF) regime is defined as where the cyclic of structural component is greater than 1×107 load applications, which thoroughly breaks the traditional concept of infinite......
, 合金表现出循环软化行为; 低应变幅下位错在γ′相前塞积造成位错可动性降低, 合金表现出循环硬化行为. 疲劳裂纹主要萌生于试样表面或近表面缺陷处, 以穿晶方式扩展; 合金基体中块状碳化物对裂纹扩展起阻滞作用. 关键词: 抗热腐蚀高温合金; K44; 低周疲劳; 循环应力响应; 疲劳裂纹 中图分类号: TG172.6 文献标识码: A Low cycle fatigue behavior..., China) Abstract: Low cycle fatigue(LCF) property and fracture behavior for alloy K44 at 900℃ were investigated. The results show that the LCF property of alloy K44 under various strain amplitudes......
:ZL101铝合金；多轴低周疲劳；非比例载荷；循环硬化；位错 中图分类号:TG 146.2 文献标识码:A Low cycle fatigue behavior of cast aluminum alloy ZL101 under multi-axial loading ZHU Zheng-yu1, HE Guo-qiu1, DING..., China; 2. National Power Traction Laboratory, Southwest Jiaotong University, Chengdu 610031, China) Abstract: Multi-axial low cycle fatigue behavior of cast aluminum alloys ZL101 at different......
Trans. Nonferrous Met. Soc. China 25(2015) 3505-3514 Low cycle fatigue behavior of T4-treated Al-Zn-Mg-Cu alloys prepared by squeeze casting and gravity die casting Cheng-kun ZHENG, Wei-wen ZHANG, Da...: Gravity die casting (GC) and squeeze casting (SC) T4-treated Al-7.0Zn-2.5Mg-2.1Cu alloys were employed to investigate the microstructures, mechanical properties and low cycle fatigue (LCF) behavior......
层的裂纹扩展速率大于双态,但在裂纹扩展中后期,双态的裂纹扩展速率反而更高. REFERENCES [1] HUANG Chao-wen, ZHAO Yong-qing, XIN She-wei, TAN Chang-sheng, ZHOU Wei, LI Qian, ZENG Wei-dong. Effect of microstructure on high cycle fatigue...]. Materials Science and Engineering A, 2011, 528(29): 8723-8732. [8] HUANG Chao-wen, ZHAO Yong-qing, XIN She-wei, TAN Chang-sheng, ZHOU Wei, LI Qian, ZENG Wei-dong. High cycle fatigue behavior......
锂动力电池LiFePO4电极的加速寿命王罗英1,李建玲1,高飞1,王新东1,赵淑红2,王子冬2(1.北京市北京科技大学 冶金与生态工程学院2.中国北方车辆研究所,北京 100072)摘 要:采用LiFePO4商业电池的正电极组装成扣式电池,以温度和放电倍率为加速因子进行加速寿命循环试验.结果表明,寿命循环前期的扣式电池,容量和功率均出现先增加后衰减的变化规律.高温加速了电化学过程,但对锂离子扩散系数影响不大.大倍率放电,使电极的极化加强,加速了电池老化.关键词:电池材料； 锂动力电池； LiFeP......
退火温度和应力-应变循环对Ti-Ni-Cr形状记忆合金超弹性的影响王启1,贺志荣2,王永善1,杨军1(1.陕西省汉中市陕西理工学院材料科学与工程系2.陕西理工学院 材料科学与工程学院)摘 要:用拉伸实验研究了退火温度(θan)和应力应变循环对Ti-50.8Ni-0.3Cr合金超弹性(SE)的影响.结果表明,随θan升高,应力诱发马氏体(M)相变的临界应力σM先降低后升高,随后趋于稳定,分别在450和600℃达到最小值(311 MPa)和最大值(583 MPa).残余应变在θan=350-590℃之间变化不大,始......
analysis meter. Then the stress-strain curve of CuZnAl SMA is measured by electronic universal testing machine. The change of microstructure during thermo-mechanical cycle is analyzed by transmission... cycle 普通支撑框架是高层钢结构采用较多的结构形式. 由于其刚度大, 同时支撑的滞回性能匮乏, 滞回环较小或退化, 耗能能力差, 偏心支撑综合钢框架抗震工作时以牺牲主梁为代价, 柱子和支撑的截面很大, 经济效果较差[1]. 因此, 近年来发展的新的框架减振体系是在支撑框架结构上安装专门的耗能装置以消耗地震能量. 形状记忆合金是一种集传感, 驱动于一体的新型功能材料, 当外部环境的温度, 应力发生......
Materials, 2004, 6(5): 281-289. [8] BEGUM S, CHEN D L, XU S, LUO Alan-A. Effect of strain ratio and strain rate on low cycle fatigue behavior of AZ31 wrought magnesium alloy[J]. Materials Science &... alloy and its low-cycle fatigue behavior at 573 K[J]. Transactions of Nonferrous Metals Society of China, 2017, 27(5): 1026-1035. [13] XIONG Y, YU Q, JIANG Y Y. Cyclic deformation and fatigue of extruded......
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