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Effect of RE Modification and Heat Treatment on Impact Fatigue Property of a Wear Resistant White Cast Iron 常立民1,刘建华2,王继东1,张瑞军2 (1.Analysis and Measure Center,Jilin Normal University,Siping... of fatigue cracks in a wear resistant white cast iron after impact fatigue test were observed by means of optical microscope and SEM, and the relationship among the content of RE (rare earths) in the wear......
失和异号位错相消,而中,高应变幅下位错结构的回复机制主要表现为多边形化回复机制.粗晶纯铝经不同总应变幅疲劳后的DSC曲线测量结果与TEM观察结果基本一致. 关键词:纯铝；疲劳位错结构；热稳定性；退火；回复 中图分类号:TG146 Thermal stability of fatigue dislocation structures in coarse-grained pure aluminum... at different total strain amplitudes (Dεt/2) up to almost the same accumulated strain, and then annealed at different temperatures (200, 330 and 450 ℃) for 30 min. The fatigue dislocation structures as well......
microscopy (SEM) analyses of fracture morphology and crack propagation paths. The results show that there occurs lower fatigue crack growth rate with decrease in the content of primary α phase, with appearance...展路径及断口微观特征 Fig. 3 Fatigue crack propagation paths and fracture morphology of lamellar structure with 3% primary α phase at △K=(14.3±0.5) MPa·m1/2 图4 完全片层组织在低应力近门槛区疲劳裂纹断口形貌 Fig. 4 ......
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Influence of Rare Earths on Contact Fatigue of Rail Steels ZHU Gui-lan1,MA Teng1 (1.Department of Physics, Central Iron and Steel Research Institute, Beijing 100081, China) Abstract:Rail/wheel contact fatigue of NbRE rail, Nb rail and U74 rail was investigated using contact fatigue tester. Microstructure and morphology as well as microhardness in the fatigue profiles were analyzed by scanning......
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Trans. Nonferrous Met. Soc. China 30(2020) 3195-3209 Fatigue strength and microstructure evaluation of Al 7050 alloy wires recycled by spray forming, extrusion and rotary swaging Joao G. J. de.... The 7050 alloy machining chips were spray formed, hot extruded, rotary swaged and heat-treated in order to improve mechanical properties. Microstructures, tensile properties and fatigue strength results......
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Fracture criterion for predicting surface cracking of Ti40 alloy in hot forming processes ZHANG Xue-min(张学敏)1, ZENG Wei-dong(曾卫东)1, SHU Ying(舒 滢)1, 2, ZHOU Yi-gang(周义刚)1, ZHAO... rate range of 0.01-10 s-1 to investigate its fracture behavior and critical fracture conditions in hot forming. It was observed that the failure of Ti40 alloy is attributed to longitudinal surface......
Engineering, 2007, 24(1): 372-381. [9] ZALOUNINA A, ANDREASEN J H. Theoretical analysis of fatigue crack growth in a coated substrate [J]. International Journal of Fracture, 2005, 133(1): 3-10. [10... analysis results gave insight into the fracture mechanism of DLC films coated on brittle ceramic (Al2O3) substrates. The maximum principal stress field was used to locate the most expected area for crack......
