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strength increases, but the fracture strain and fatigue resistance decrease with decreasing foil thickness. Deformation and fatigue damage behavior was characterized. The size effect on tensile...Tensile and Fatigue Properties of Free-Standing Cu FoilsCaiyun Dai, Xiaofei Zhu and Guangping Zhang Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy......
deformation associated with the increased plasticity makes it difficult to consistently couple the transducers to the specimen surface at the later stages of fatigue life. The opening and closing of crack... Nonlinear ultrasonic characterizing online fatigue damage and in situ microscopic observation WU Bin1, YAN Bing-sheng1, 2, HE Cun-fu1 1. College of Mechanical Engineering and Applied Electronics......
SHORT FATIGUE CRACK PARAMETER BASED ON THE TOTAL CRACK AREA X.C.Wu1,Z.X.Wu1 (1.Engineering College,Yangzhou University,Yangzhou 225009,China) Abstract:The progressive fatigue damage of a material is closely related to the whole populationof cracks on the surface of an un-notched specimen.In order to understand whichparameter is a more useful indicator of fatigue damage,rotatory bending fatigue......
Effects of hydrogenation on ambient deformation behaviors of Ti-45Al alloy SU Yan-qing(苏彦庆), LIU Xin-wang(刘鑫旺), ZHAO Long(赵 龙), WANG Liang(王 亮), GUO Jing-jie(郭景杰), FU Heng-zhi(傅恒志) School...; Abstract: Effects of hydrogenation on ambient deformation behaviors of Ti-45Al alloy......
Hot Deformation and Dynamic Recrystallization Behavior of Austenite-Based Low-Density Fe–Mn–Al–C SteelYa-Ping Li1,Ren-Bo Song1,Er-Ding Wen1,Fu-Qiang Yang21. School of Materials Science and Engineering, University of Science and Technology Beijing2. R&D Center, BAIC Motor Corporation LTD摘 要:The hot deformation and dynamic recrystallization(DRX) behavior......
-objective optimization of lightweight and fatigue life for car door LONG Yan1, 2, JIANG Lingshan2, LIU Xueqiang2, XIONG Hailin2, CHEN Zhiyong1, ZHONG Huiqing2 (1. State Key Laboratory of Automotive... the performance of a domestic car door synthetic, a multi-objective optimization method considering lightweight and fatigue life was implemented. Firstly, the finite element models (FEM) of car body......
, and the rutting deformation is smaller than that of other structure. The asphalt layer of which is below the surface about 1/5 thickness and the bottom surface at the joint are prone to shear fatigue... base asphalt pavement; rutting deformation; fatigue damage; shear fatigue; cracking mechanism 刚性基层沥青路面是一种使用性能良好的结构形式,具有整体强度高,使用寿命长,行车舒适性好,维修费用小等优点,从长期使用性能来看,经济性也较好[1-3].修筑刚性基层沥青路面也能减少对石油资源的依赖,并充分利用我国相对......
DZ468合金高周疲劳性能研究刘恩泽1,郑志1,佟健1,宁礼奎1,管秀荣1(1.辽宁省沈阳市科学院金属研究所)摘 要:本文研究了新型镍基高温合金DZ468的高周疲劳性能.结果表明:当应力比R=-1时,在900和760℃条件下,DZ468合金的疲劳强度分别为290和300 MPa.DZ468合金的高周疲劳试样断口由疲劳源,疲劳区和瞬断区组成.裂纹在表面,次表面和内部缺陷部位萌生,裂纹扩展具有第Ⅰ和第Ⅱ阶段,随应力幅增加裂纹扩展速率增大.光滑试样的疲劳裂纹扩展方式与变形机制间存在一定的关系,位错的平面滑移,交滑移和......
Influence of Microstructural Evolution on the Hot Deformation Behavior of an Fe–Mn–Al Duplex Lightweight SteelLi-Xiong Xu1,Hui-Bin Wu1,2,Xin-Tian Wang11. Collaborative Innovation Center of Steel...="ChDivSummary">The hot deformation behavior of Fe–26 Mn–6.2 Al–0.05 C steel was studied by experimental hot compression tests in the temperature range of 800–1050 °C and strain rate range of 0.01–30 s21......
be divided into five stages [17]: 1) cyclic plastic deformation prior to fatigue crack initiation; 2) initiation of microcrack; 3) propagation or coalescence of microcracks to form one or more... through plastic deformation inducing decreased Kt value in elastic-plastic model. The modeling results by XU et al [78, 80] explained why fatigue cracks were often initiated from those pores......