共搜索到27710条信息,每页显示10条信息,共2771页。用时:0小时0分0秒312毫秒
Effects of Aging Temperature on Microstructure and High Cycle Fatigue Performance of 7075 Aluminum Alloy杨大炼1,2,刘义伦2,3,LI Songbai2,MA Liyong4,LIU Chi2,YI Jiuhuo21. Hunan Provincial Key Laboratory..., Central South University4. School of Mechanical Engineering, Hebei University of Architecture摘 要:The hardness, the tensile and the high-cycle fatigue(HCF......
Effect of main inclusions on crack initiation in bearing steel in the very high cycle fatigue regimeChao Gu1,Yan-ping Bao1,Peng Gan1,Min Wang1,Jin-shan He21. State Key Laboratory of Advanced... on crack initiation in bearing steel in the very high cycle fatigue(VHCF) regime. The size and type of inclusions in the steel were quantitatively analyzed, and VHCF tests were performed. Some fatigue......
Microstructural influences on the high cycle fatigue life dispersion and damage mechanism in a metastable β titanium alloyZhihong Wu,Hongchao Kou,Nana Chen,Zhixin Zhang,Fengming Qiang,Jiangkun Fan... features on the high-cycle fatigue behavior of Ti-7Mo-3Nb-3Cr-3Al(Ti-7333) alloy is investigated. Fatigue tests were carried out at room temperature in lab air atmosphere using a sinusoidal wave......
fatigue are rather developed and most of them focused on high-temperature low-cycle fatigue. There are few reports on high-temperature high-cycle fatigue and the mechanism of high-temperature fatigue... incensement in high temperature fatigue toughness, but also derives the best high temperature mechanical properties based on ladder method. The stress-cycle number curves of specimens 0 and 9 (fatigue......
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......
......
......
......
Effect of inclusion size on the high cycle fatigue strength and failure mode of a high V alloyed powder metallurgy tool steelJun Yao, Xuan-hui Qu, Xin-bo He, and Lin Zhang State Key Laboratory... strength of a high V alloyed powder metallurgy tool steel with two different inclusion size levels, tempered at different temperatures, was investigated by a series of high cycle fatigue tests......
裂的过程可以分为疲劳源区,扩展区与瞬断区3部分. 图5 TC32钛合金双态组织的高周疲劳断口形貌 Fig. 5 SEM images of high cycle fatigue fracture surface of bimodal microstructure at a stress ratio of -1 in TC32 alloys 图6 TC32钛合金网篮组织的高周疲劳断口形貌 Fig. 6 SEM images of high cycle fatigue fracture surface of basket microstructure at stress ratio of 0.1 in TC32 alloys 图5(a)与图6(a)所示分别为双态组织与网篮组织的宏观断口形貌,观察发现,疲劳裂纹源均萌生于试样近表面,且为单一疲劳......