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]. Fatigue & Fracture of Engineering Materials & Structures, 1991, 28: 1153-1160. [5] SEGERSALL M, LEIDERMARK D, MOVERARE J J. Influence of crystal orientation on thethermomechanical fatigue... ℃[J]. Fatigue & Fracture of Engineering Materials & Structures, 2007, 30: 1076-1083. [10] XIAO L, CHATURVEDI M, CHEN D. Effect of boron on the low-cycle fatigue behavior and deformation......
First Chinese Youth Symposium on Fatigue钟震晨摘 要:<正> The First Chinese Youth Symposiumon Fatigue was successfully held in the Insti-tute of Metal Research,Academia Sinica,on May 14-16,1992.The symposium wassponsored by the State Key Laboratory forFatigue and Fracture of Materials(SKLFFM).74 young participants from all关键词:......
) Abstract: Anodic oxidation of 0.5 mm-thickness TB8 titanium alloy sheet in the electrolyte system with sodium tartrate as film-forming agent was investigated. The microstructures of the fatigue fracture... (XRD) and energy dispersive spectrometry (EDS).The fatigue fracture mechanism of both unanodized and anodized TB8 titanium alloy sheet was investigated in the film-forming agent of sodium tartrate......
, the fatigue crack growth sensitivity and fracture features with various tailored α phase morphologies were thoroughly investigated using fatigue crack growth rate (FCGR) test, optical microscopy (OM... secondary α phase. Key words: Ti-5Al-5Mo-5V-1Cr-1Fe alloy; α phase; fatigue crack growth; fracture feature 1 Introduction Near-β Ti-5Al-5Mo-5V-1Cr-1Fe (Ti-55511) alloys are known for the combined......
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......
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J. Cent. South Univ. (2020) 27: 542-553 DOI: https://doi.org/10.1007/s11771-020-4315-0 Bearing characteristics and fatigue damage mechanism of multi-pillar system subjected to different cyclic... University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: Aiming to investigate the fatigue damage mechanism and bearing characteristics of multi-pillar system under cyclic......
mechanical properties, but also high ductility and fatigue crack propagation performance. Key words: Al-Cu-Mg alloy; fracture toughness; fatigue crack; propagation rate Foundation item: Project... 不同时效制度下Al-Cu-Mg合金的断裂韧性 Table 4 Fracture toughness of Al-Cu-Mg alloy under different ageing processes 图3所示为不同热处理状态下Kahn撕裂断口形貌的SEM像.在自然时效状态下,从图3(a)断口形貌中可看出,断裂方式由韧窝型穿晶断裂和沿晶断裂组成,韧窝较少,且相对较小,尺......
)). 图6 在较低应力(92.5%σ0.2),高循环周次条件下的疲劳断口SEM形貌 Fig.6 SEM morphologies of fatigue fracture surfaces of alloy in high cycles with low stress (92.5%σ0.2): (a) Full view; (b) Early propagation area...应力低循环周次条件下的疲劳条带可以明显发现,在高循环周次条件下,疲劳条带更为清晰,间距也更为规则,而在低循环周次条件下,疲劳条带欠规则,可以看到疲劳条带绕过第二相粒子扩展的情形 (见图6(c)和图7(d)). 图7 较高应力(140%σ0.2),低循环周次条件下的疲劳断口SEM形貌 Fig.7 SEM morphologies of fatigue fracture......
Cyclic deformation behaviors of Ti-46Al-2Cr-2Nb-0.15B alloy during thermo-mechanical fatigue tests XIANG Hong-fu(项宏福)1, DAI An-lun(戴安伦)1, WANG Ji-heng(王冀恒)1, LI Hui(李 惠)1, YANG Rui(杨 锐)2 1... 110016, China Received 23 October 2009; accepted 15 August 2010 Abstract: Thermo-mechanical fatigue tests were carried out on the gamma-TiAl alloy in the temperature range of 500-800 °C under mechanical......
