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纹扩展区 中图分类号:TG 113 文献标志码:A Fractograph and fatigue behavior of TC18 titanium alloy lugs LIU Cui-yun, LI Huan-xi, MA Chao-li (Key Laboratory of Aerospace Materials and Performance, Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing 100191, China) Abstract: The fatigue behavior of straight lugs of TC18 titanium alloy......
treatment and then carburizing and hardening to the hardness of HRC60-62. This work included the test results of the contact fatigue strength carried out on the circulating power system. The Wohler... of the retained austenite, compressive residual stress value, but also the results of contact fatigue strength tests, are more favorable for the teeth shaving method than for the teeth grinding method. Key......
the longitudinal specimen and transverse specimen in fatigue strength and fatigue life.The fatigue strength and fatigue life of longitudinal specimen are higher than those of transverse specimen.During the tensile and fatigue testing process,the fracture temperature in the transverse direction are higher than that in the longitudinal direction.The fatigue strength prediction by means of infrared......
that the maximum increase in strength occurred after the 2nd pass. The total increase in ultimate strength after eight passes was 94%. The results of fatigue tests indicated that a significant...Improvements in the microstructure and fatigue behavior of pure copper using equal channel angular extrusionJ.Nemati1,G.H.Majzoobi2,S.Sulaiman1,B.T.H.T.Baharudin1,M.A.Azmah Hanim11. Department......
；疲劳试验 中图分类号:TU311 文献标志码:A 文章编号:1672-7207(2019)08-1866-10 Fatigue damage evolution of Timoshenko beams based on natural frequency WEI Jun, DU Yongxiao (School..., and there is a certain internal relationship between the dynamic characteristics of the beam structures and the fatigue damage, the influence mechanism of fatigue damage evolution on the natural frequency......
performance induced is. The fatigue strength of components reduces with the increased surface roughness value, and this phenomenon is more outstanding for high strength alloy materials [3]. So we must pay.... However, Ra does not provide a reliable estimate for the reduction in strength of components. The surface topographs of fatigue specimens under four different milling parameters are shown in Fig. 7......
at the stress ratio R=0.1 and the fatigue strength was evaluated using up-to-down load method on specimens of AZ91D with different Nd contents.The results showed that the grain of AZ91D alloy was refined,the size and amount of β-Mg17Al12 phase decreased and distributed uniformly with increasing Nd content.At the number of cycles to failure,Nf=107,the fatigue strength of AZ91D evaluated by up-to-down......
that the addition of polypropylene fibers improves the flexural fatigue cumulative strength and fatigue life span.It is proposed that the slag particles and hydrated products improve Interfacial... with 0.6%polypropylene fiber for the cumulative fatigue stress.Fatigue properties are decreased as the stress level increasing,the higher frequency reduces the fatigue strength more than lower frequency......
at the stress ratio R=0.1 and the fatigue strength was evaluated using up-to-down load method on specimens of AZ91D with different Nd contents.The results showed that the grain of AZ91D alloy was refined,the size and amount of β-Mg17Al12 phase decreased and distributed uniformly with increasing Nd content.At the number of cycles to failure,Nf=107,the fatigue strength of AZ91D evaluated by up-to-down......
Relation between Shot Peening Process and Fatigue Life in the Case of Hardening Steels YASUNORI HARADA1,HARUSHIGE TSUBAKINO1,SHIGEYOSHI HAGA2 (1.Graduate School of Engineering University of Hyogo... as the need of light-weighting of gears, transmission parts. Hence, we''ve studied the relation between the shot peening working conditions and factors for improvement of gear''s fatigue life, and also......
