Effects of Interphase Damage and Residual Stresses on Mechanical Behavior of Particle Reinforced Metal-Matrix Composites

Aghdam, M.M.; Shahbaz, M.

doi:10.1007/s10443-013-9348-1

Cited by 17 publications

(8 citation statements)

References 27 publications

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“…In order to overcome this obstacle, Mg matrix composites have been developed recently. [3][4][5][6][7][13][14][15] Reinforcement of the desired composite must own excellent biocompatibility for medical applications. Hydroxyapatite (HA) is a bioceramic that has similar chemical and crystallographic structures as that of the natural bone, and it is actually the main composition of the bone tissue.…”

Section: Introductionmentioning

confidence: 99%

Microstructural properties and mechanical behavior of magnesium/hydroxyapatite biocomposite under static and high cycle fatigue loading

Sabet

Jabbari

Sedighi

2017

Journal of Composite Materials

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In this study, magnesium/hydroxyapatite biocomposites having 2.5 and 5 wt% of hydroxyapatite have been fabricated using stir casting followed by hot extrusion method. Both microstructural and mechanical behaviors of these composites have been studied, which contain particle distribution, grain size, microhardness, tension, and compression tests. Then, high cycle fatigue tests were performed using a rotating-bending testing machine (under stress ratio of R = −1). The results indicate an acceptable particle distribution and grain refinement in the composites. Also, the microhardness of the composites has been increased in comparison with the pure extruded sample. The yield stress has been enhanced in both tension and compression tests by increasing the amount of reinforcement, while the maximum strain reduced. Moreover, the fabricated biocomposites revealed better overall high cycle fatigue life in comparison to pure Mg, and infinite life (>107 cycles) could be achieved in the composites. Scanning electron microscope images of the fracture surfaces showed that the agglomeration of hydroxyapatite particles is one of the most important criteria for crack initiation in the composites.

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Section: Introductionmentioning

confidence: 99%

Microstructural properties and mechanical behavior of magnesium/hydroxyapatite biocomposite under static and high cycle fatigue loading

Sabet

Jabbari

Sedighi

2017

Journal of Composite Materials

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“…The whole model started to deform and the matrix experienced almost the same amount of strain as the whiskers, indicating that the matrix had a weakened ability to protect whiskers at this moment. The internal microcracks of the material gradually diffused along the whiskers and formed large cracks at the macro level, which eventually led to the fracture of the material and the delamination in local areas [21,22], as seen in Figure 6g. At time 0.9, when the drilling force was about 675 N and the material was approximately 138 °C, the whiskers fractured and the stress concentration caused by the whiskers fracture would cause more whiskers to break, resulting in serious failure deformation of the whole material, thus the delamination of the material was intensified at the macro level [23], as seen in Figure 6i.…”

Section: Simulation Results Experimental Verificationmentioning

confidence: 99%

Research on Microscopic Properties of TiBw/TC4 Composites for Drilling Process

et al. 2019

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TiB-whisker-reinforced TiBw/TC4 composites are widely used in aviation, aerospace, automotive, and various other industries. However, the drilling force and temperature have a large effect on the drilling micromechanical properties of TiBw/TC4 composites. In order to explore the micro-mechanical properties and promote the optimization of drilling process, the representative volume elements of TiBW/TC4 composites were established in the Digimat-FE software tool to determine the micromechanical properties and failure mechanism of TiBW/TC4 composites. The results show: (1) maximum stress occurs at the whiskers, whereas the minimum stress appears within the basket matrix region of the reinforced phase. (2) When the force reached 300 N and the temperature reached 75 °C, the junction between the whiskers and the matrix firstly failed; when the force reached 525 N and the temperature reached 112 °C, the matrix began to fail; when the force reached 675 N and the temperature reached 138 °C, the whiskers failed. (3) The main reason for the failure of the junction between the matrix and the whiskers was that the shear stress exceeded the connection strength and the axial stress accelerated the failure process. Displacement and rotation of the whiskers were shown to occur at the moment of junction failure, owing to differences in the stress experienced on different sides of the material.

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“…Zhang et al [2007] studied interphase effect on the strengthening behavior of MMCs through embedded unit cell model axisymmetric single particle. Using an axisymmetric micromechanical finite element model, Aghdam and Shahbaz [2014] studied initiation and propagation of interphase damage under combined thermal and uniaxial loading. Li and Wongsto [2004] studied the effective properties of MMCs and the stress distributions based on 3D unit cells simple cubic, body centered cubic, face centered cubic and close packed hexagonal microscopic packing systems.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical Analysis of SiC/Al Metal Matrix Composites: Finite Element Modeling and Damage Simulation

Qing

Liu

2015

Int. J. Appl. Mechanics

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The influence of interface strengths and microstructures on the strength and damage of SiC particle reinforced aluminum Metal Matrix Composite (MMC) is investigated under uniaxial tensile, simple shear, biaxial tensile and combined tensile and shear loadings. An algorithm to generate automatically the microstructural models of MMCs with random distribution of particle shapes, dimensions, orientations and locations is proposed and implemented within Matlab. A damage model based on the stress triaxial indicator is developed to simulate the ductile failure of metal matrix, the other damage model based on the maximum principal stress criterion is developed to simulate the brittle failure of SiC particles, and 2D cohesive element is utilized to describe interface decohesion between matrix and particles. A series of numerical experiments are performed to study the macroscopic stress-strain relationships and microscale damage evolution in MMCs under different loading conditions.

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Effects of Interphase Damage and Residual Stresses on Mechanical Behavior of Particle Reinforced Metal-Matrix Composites

Cited by 17 publications

References 27 publications

Microstructural properties and mechanical behavior of magnesium/hydroxyapatite biocomposite under static and high cycle fatigue loading

Microstructural properties and mechanical behavior of magnesium/hydroxyapatite biocomposite under static and high cycle fatigue loading

Research on Microscopic Properties of TiBw/TC4 Composites for Drilling Process

Micromechanical Analysis of SiC/Al Metal Matrix Composites: Finite Element Modeling and Damage Simulation

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