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crack length, c0, respectively. The crack growth rates along the length and depth directions in the process of coalescence on double collinear cracks were also studied.Key words:large-module rack; double cracks; fatigue crack propagation; crack spacing threshold; moving load......
Fatigue Crack Growth of Al-Li Alloy 2091 in 3.5% NaCl Solution and at 130℃何世禹,王中光,李清建,张匀,冯晓曾摘 要:<正> A study has been made of the fatigue crackgrowth... growth resistance decreases withaging.The specimen with underaged structuresshows the highest resistance to fatigue crack growthdue to more deflected crack paths and the resultinghigh crack closure......
A Statistical Model of Quantitative Relationship between Striation Spacings and Fatigue Crack Growth Rates杨京俊,柯伟摘 要:<正> Fatigue crack growth experiments were per-formed on A1 alloy LD 10 and Ti-6A1-4V alloy.Fatigue striation spacings and the deviationangles between the direction of micro-crackgrowth and that of macro-crack growth were quanti......
喷射沉积SiCP/Al-7Si复合材料的疲劳裂纹扩展李微1,陈振华1,陈鼎1,滕杰1(1.湖南省长沙市湖南大学材料科学与工程学院)摘 要:采用紧凑拉伸试样进行恒载和降K控制的拉-拉疲劳实验,研究了喷射沉积SiCp/Al-7Si复合材料及其基体的疲劳裂纹扩展行为.通过金相显微镜和扫描电镜观察了复合材料及其基体的组织和疲劳裂纹扩展形貌,研究了SiC颗粒对复合材料疲劳裂纹扩展机制的影响.结果表明:复合材料在任何相同的ΔK水平下其抗疲劳裂纹扩展能力优于基体材料,并表现出较高的疲劳门槛值.其原因是复合材料中裂纹裂尖遇到增......
Xing-hui, FRANCESCO D C, NAGARAJAI, MADDANK. On the correlation between fatigue striation spacing and crack growth rate: A three-dimensional (3-D) X-ray synchrotron tomography study[J]. Metallurgical and Materials Transactions A, 2011, 42(13): 3845-3848. [19] BULLOCH J H, CALLAGY A G. A detailed study of the relationship between fatigue crack growth rate and striation spacing in a range of low alloy......
Institute for Nonferrous Metal Research, Xi’an 710016, China) Abstract: The fatigue crack growth rate of TC4-DT damage tolerance titanium alloy was investigated. Fatigue crack propagation feature..., QU Heng-lei, ZHAO Yong-qing, ZENG Wei-dong, FENG Liang, CHEN Jun. Effect of microstructure on fatigue crack growth rate of damage tolerance for TC4-DT alloy[J]. Rare Metals Letters, 2006, 25(3......
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, 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..., and the equiaxed microstructure, have attracted major attention under the damage tolerance design concept [3-6]. SHI et al [3] studied the fatigue crack growth rate of a Ti-5Al-5Mo-5V-1Cr-1Fe alloy......
to the logarithmic expression of loading rate. (3) For Huanglong limestone, when the growth velocity of crack is lower than 100 m/s, the energy release rate slightly decreases with increasing the growth velocity of crack. However, when the growth velocity of crack is higher than 1 000 m/s, the energy release rate dramatically decreases with an increase in the crack growth velocity. Key words: fracture......
Effect of thermal aging on the fatigue crack growth behavior of cast duplex stainless steelsXu-ming Lü1,Shi-lei Li1,Hai-long Zhang1,Yan-li Wang1,Xi-tao Wang1,21. State Key Laboratory for Advanced...="ChDivSummary">The effect of thermal aging on the fatigue crack growth(FCG) behavior of Z3CN20?09M cast duplex stainless steel with low ferrite content was investigated in this study. The crack surfaces......
