共搜索到23089条信息，每页显示10条信息，共2309页。用时：0小时0分0秒520毫秒
, Tsinghua University, Beijing 100084, China) Abstract:Fatigue crack growth behaviors in electron beam weldments of a nickel-base superalloy are studied. The objective of this paper is to discuss effects of the inhomogeneity of mechanical performance on fatigue crack growth (FCG) rate and crack path deviation (CPD). The base metal served in a turbine disk of aerospace engine was selected to fabricate......
of a 7B04-T7451 (Al-Zn-Mg-Cu) subjected to a tensile pre-strain level of 2％ was investigated, including the fatigue crack growth (FCG) rate, microstructure observation, fractographic examination... area. Key words: 7B04-T7451 aluminum alloy; high cycle fatigue; fatigue crack growth rate; endurance limit ......
% and the fatigue crack growth rate (FCGR) decreases significantly. The fatigue fractures of the alloy in T3 and T6 conditions are transgranular. But in T3 condition, secondary cracks occur and fatigue... and the cyclic slip reversibility.
Key words: 2E12 aluminum alloy; aging; fatigue life; fatigue crack growth rate; fatigue fracture
Fracture toughness and fatigue crack growth analysis of 7050-T7451 alloy thick plate with different thicknessesWANG Yi-lin(王艺淋)1, PAN Qing-lin(潘清林)1, 2, WEI Li-li(韦莉莉)1, LI Bo(李波)1, WANG Ying(王迎)1(1... University), Changsha 410083, China)Abstract:The strength, fracture toughness and fatigue crack growth resistance of 7050-T7451 aluminum alloy plate with different thicknesses (35 mm and 160 mm) were......Fracture toughness and fatigue crack growth analysis of 7050-T7451 alloy thick plate with different thicknesses
来源： 《中南大学学报(英文版)2014年第8期》——WANG Yi-lin(王艺淋) PAN Qing-lin(潘清林) WEI Li-li(韦莉莉) LI Bo(李波) WANG Ying(王迎)
on the microstructure of the fatigue crack propagation zone, because different microstructures relate to different growth threshold and propagation rate of the crack, then these would affect... and crack growth. The fatigue fracture is characterized by three zones: fatigue crack source zone, fatigue crack propagation zone and fatigue fracture zone. The fatigue damage preferably incubates......
INVESTIGATION OF THE LOW-CYCLE FATIGUE AND FATIGUE CRACK GROWTH BEHAVIORS OF P91 BASE METAL AND WELD JOINTS M.M.Yu1,H.C.Yang1,Y.Tu1,J.Zhao2 (1.Dongfang Boiler (Group;2.Department of Materials Engineering, Dalian University of Technology, Dalian 116023, China) Abstract:Low cycle fatigue tests and crack growth propagations tests on P91 pipe base metal and its weld joints were conducted at three......
Residual stress relaxation in typical weld joints and its effect on fatigue and crack growth Chunyan JI1,Zhengquan WAN2,Liangbi LI1,Zili WANG1 (1.School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;2.China Ship Scientific Research Center,Wuxi 214082,China) Abstract:Many factors influence the fatigue and crack growth behavior......
microscopy, orientation distribution function and scanning electron microscopy were used to investigate the fatigue properties and the rate of fatigue crack growth of 7475-T7351 alloy plate with thickness..., and the fatigue life is longer than 1×107 cycle. Under the conditions of Kt=1, stress ratio R=0.1 and stress intensity factor amplitude △K=30 MPa·m1/2, the fatigue crack growth rate da/dN along the longitudinal......
on titanium alloy electron beam welding(EBW) joints, mechanism of fracture was investigated under scanning electron microscope(SEM). The results show that fatigue crack growth rate increases...Fatigue crack growth of titanium alloy joints by electron beam weldingHong-Yu Qi,Hao Shi,Shao-Lin Li,Xiao-Guang YangSchool of Jet Propulsion, Beijing University of Aeronautics and Astronautics摘 要......
-compression loading. The fatigue crack initiated at early stage of the fatigue life in low cycle regime regardless of specimen direction. The crack growth rate of the L-specimen was slightly lower than... be seen that the crack growth rate of the L-specimen was slightly lower than that of the T-specimen. Figs.5(b) and 6(b) Fig.4 Crack length as function of cycle ratio at σa=110 MPa Fig.5 Fatigue......
