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. 图8 不同工艺处理后试样疲劳寿命对比图 Fig. 8 Comparison diagram of fatigue life of samples conducted in different technologies 图9 不同工艺处理后试样疲劳断口图 Fig. 9 Fatigue fracture images of samples... Fig. 1 Shape and size of TC4 sample used in fatigue test (Unit: mm) 2 结果与讨论 2.1 涂层相组成分析 图2所示为不同工艺处理后试样表面XRD谱.相比于曲线(a)和(c),曲线(b)和(d)所示谱线的钛衍射......
for the cracked specimen with hydraulic pressure applied on its crack surface. Based on the newly derived formula, THM coupling fracture modes (including tensile, shear and mixed fracture mode) can be predicted by a new fracture criterion of stress intensity factor ratio, where the maximum axial load was measured by self-designed THM coupling fracture test. SEM analyses of THM coupling fractured......
analysis example[M]. Beijing: China Machine Press, 2006: 23-36. [8] Tschegg E K, Jamek M, Lugmayr R. Fatigue crack growth in asphalt and asphalt-interfaces[J]. Engineering Fracture Mechanics, 2011,78(6): 1598-1602. [9] LI Qiang, Lee H J, Kim T W. A simple fatigue performance model of asphalt mixtures based on fracture energy[J]. Construction and Building Materials, 2012, 27(1): 605-611. [10] 郑健龙, 吕松涛......
on mechanical properties (impact toughness, quasi-tensile properties and fatigue life, etc), fracture characterization of titanium alloys and their welds. MA et al[10] reported the microstructures, impact toughness and fracture characteristics of linear friction welded Ti-6Al-4V alloy joint. KISHORE et al[11] studied the room temperature hardness, quasi-static tensile properties and fatigue life......
tensile and fatigue fracture surfaces by means of a multi-focus microscope and SEM-EDS, aiming to assess the mechanisms of failure and the crack nucleation sites. A comparison of the overaging behaviour...%) Fracture surface analyses of fatigue samples highlighted that in almost all the tested specimens (independently from SDAS and test condition), fatigue cracks nucleated in the outer zone of the specimen......
about 10% than 7150-T6 and 30% than 7075-T76 with high fracture toughness and good resistance to corrosion and to the growth of fatigue cracks, and these attractive properties are attributed to the high..., prolonging transfer time can increase the percentage of intergranular fracture, which is mainly caused by wide grain boundary precipitate free zone. The failure mode of the Zr-containing alloy......
strength. As a result, it is still an important engineering problem to achieve good matching between strength, fracture toughness, corrosion resistance ability, fatigue and damage tolerance property... and mechanisms governing fracture. 3 Results and discussion 3.1 Influence of stress ratio and heat treatment on crack propagation ratios da/dN versus ΔK curves were utilized to describe the fatigue crack......
Study on Contact Fatigue Life and Failure Mechanism of Subquenched 42CrMo Steel SHAO Er-yu1,HE Bo-lin2,YU Ying-xia2 (1.Material Institute,Hean University of Science and Technolgy,Luoyang,China;2.School of Mechanical & Electrical Engineering,East China Jiaotong University,Nanchang,China) 摘要:The effect of undissolved ferrite amount in subcritically quenched 42CrMo steel on contact fatigue......
疲劳辉纹间距分别为200和100 nm左右,疲劳辉纹宽度与宏观裂纹扩展速率有关.在瞬断区,两种合金样品断面上均呈典型的韧性断裂(见图3(d)和(h)),相比之下2524SZ合金韧窝尺寸较小. 图3 两种合金T3态薄板疲劳裂纹扩展断口特征 Fig.3 Fracture characteristics of fatigue crack growth of two..., 2005 19(2): 76-80. [3] SRIVATSANA T S, KOLAR D, MAGNUSEN P. The cyclic fatigue and final fracture behavior of aluminum alloy 2524[J]. Materials and Design, 2002, 23(2): 129-139. [4] NESTERENKO G I......
; 文献标志码:A 文章编号:1672-7207(2015)02-0437-07 Fracture toughness of 7475-T7351 aluminum alloy thick plate CHEN Jun1, 2, DUAN Yulu2, PENG...: The fracture toughness and its anisotropy of 25 mm 7475-T7451 aluminum alloy thick plate were investigated. The relationship between its microstructure and fracture toughness was explored by means of optical......
