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higher than those of free Nb TiAl alloys, indicating that the ductile phase toughening mechanism is operative in TiAl-Nb composites. Fracture surface morphologies of the heat-treated composite are shown... composite, the fracture surface predominantly exhibits cleavage in addition to insufficient stretching of Nb phase and few instances of interface decohesion. The softness of Nb phase may blunt......
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) Coalescence of branch fractures without cyclic loading. At this time, there is not any branch fracture on the sample’s surface. When the cycle number reaches 185, the wing fracture appears in the tip...J. Cent. South Univ. Technol. (2008) 15: 95-99 DOI: 10.1007/s11771-008-0019-6 Fatigue properties analysis of cracked rock based on fracture evolution process ZHANG Ping(张 平)1, 2......
Molecular Dynamics Simulation of Tensile Deformation and Fracture of γ-TiAl with and without Surface DefectsH.N.Wu,D.S.Xu,H.Wang,R.YangInstitute of Metal Research, Chinese Academy of Sciences摘 要:Molecular dynamics simulation of uniaxial tension along [001] has been performed to study the influence of various surface defects on the initiation of plastic......
Fracture properties of epoxy asphalt mixture based on extended finite element methodQIAN Zhen-dong(钱振东), HU Jing(胡靖)(Intelligent Transportation System Research Center, Southeast University, Nanjing 210096, China)Abstract:Crack is found to be a major distress that affects the performance of the epoxy asphalt pavement. An extended finite element method was proposed for investigating the fracture......
and smooth areas) with different features are alternatively distributed on the whole fracture surface. The dimple areas originate from voids generation and coalescence, exhibiting ductile fracture... are smeared by segments separated from specimens. It is hard to accurately investigate the fresh surface and analyze the fracture mode occurred in ASBs. Thus, dynamic fracture mode of materials......
that the fracture of coating layer occurs in an irregular manner at the region where compressive deformation is dominant. Meanwhile, a series of vertical cracks perpendicular to material surface are observed... in the coating layer are considered to be brittle. Therefore, as formability increases, fracture in the coating layer occurs during forming. To enhance the formability and surface quality of the GA......
fracture surface [6, 7]. Therefore, considering the loading rate effect of rock with the knowledge of fracture mechanics can be more helpful to understand the internal mechanism of the change of rock... acquisition equipment. The AE sensor was tightly attached to the surface of the rock specimen to accurately record the AE signals generated by the fracture of the specimen during the loading process......