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A Method of Observing Fatigue Crack Growth by SEM穆恩生,林吉忠,吴玉树,胡玉祥,成兆银摘 要:<正> This paper introduces a modified control cir-cuit of static tensile stage of Cambridge S-200SEM.The function of the stage is extended to thatof a tensile/compressive dynamic fatigue testingstage.It can be used for studying fatigue microcharacteristic and crack......
Fatigue Crack Propagation in Plain Carbon Dual-phase Steel雷廷权,林广湧摘 要:<正> The effect of volume fraction VM and carboncontent(%C)M of martensite was studied on the fa-tigue crack propagation behaviour of plain carbonmartensite plus ferrite M+F dual-phase steel.Theexperimental results show that the △Kthdecreasesand da/dn increases with increasing VM......
between the brittle Ti-enriched zones and the ductile Nb-enriched zones but also act as the crack-arresters to prevent the local cracks in the Ti-enriched zones from further propagating across...Trans. Nonferrous Met. Soc. China 29(2019) 1882-1888 Crack propagation behavior of inhomogeneous laminated Ti-Nb metal-metal composite Wen-juan CHENG1, Yong LIU1, Da-peng ZHAO2, Bin LIU1, Yan-ni TAN1......
As-extruded AZ31B Magnesium Alloy Fatigue Crack Propagation Behavior张红霞,王文先College of Material Science and Engineering,Taiyuan University of Technology摘 要:The fatigue crack propagation rate of as-extruded AZ31B magnesium alloy was studied. Compact tension [C(T)] of the notch direction parallel (T-L), vertical (L-T), and inclined at 45o to the extrusion......
stress at both ends of the specimen. The first crack was oriented at 50° from the horizontal direction and kept constant throughout the analysis while the orientation of the second crack was changed... to study the effect of confining pressure on the crack propagation process, showing that the SIFs increase and the crack initiation angles change in this case.Key words:crack propagation; crack......
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Prediction of Cold Dwell-Fatigue Crack Growth of Titanium AlloysKe Wang1,Fang Wang2,Wei-Cheng Cui2,A.-Li Tian31. School of Naval Architecture and Ocean Engineering, Shanghai Jiao Tong University2... fatigue life prediction method developed by the authors’ group is modified in this paper to predict dwell-fatigue crack growth taking into account the effects of dwell time and maximum stress......
The effect of crack tip environment on crack growth behaviour of a low alloy steel at cathodic potentials in artificial seawaterYong Li1,Zhiyong Liu1,2,Endian Fan1,Zhongyu Cui3,Jinbin Zhao1,41... at crack tip and its effect on the crack growth behaviour of low alloy steel-E690 steel were studied at cathodic potentials in artificial seawater. The results showed that the micro environment......
of the compression fracture, the length range of crack fracture in different stress states was solved, the mathematical expectation of crack length was calculated by probability statistics... coefficient and angle on rock strength. When the friction coefficient is 0, the corresponding angle of minimum strength of rock is 45°. With the increase of the friction coefficient, the crack angle......
