Mechanical and Wear Properties of High Rate NiAl Particle-Reinforced Al Composites Produced by Pressure Infiltration Method

Demirtaş, Hüseyin; Yildiz, Ramazan; Cevik, Engin

doi:10.1007/s40962-020-00564-6

Cited by 9 publications

(1 citation statement)

References 27 publications

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“…When considering different fabrication methods, two main parameters are important to the composite’s effective properties. The first is the distribution of the reinforcing particles in the matrix, and the second is the resulting particle-matrix interface conditions [ 6 ]. While liquid-state fabrication processes may lead to the in situ formation of reinforcing particles in the melt, which can result in greater particle-matrix bonding strength, better control of particle distribution is obtained in solid-state processes in which the reinforcing particle and matrix particles are created ex situ, and then combined during the solid-state fabrication process.…”

Section: Introductionmentioning

confidence: 99%

Aluminum Matrix Composites with Weak Particle Matrix Interfaces: Effective Elastic Properties Investigated Using Micromechanical Modeling

et al. 2021

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The impact of weak particle-matrix interfaces in aluminum matrix composites (AMCs) on effective elastic properties was studied using micromechanical finite-element analysis. Both simplified unit cell representations (i.e., representative area or volume elements) and “real” microstructure-based unit cells were considered. It is demonstrated that a 2D unit cell representation provides accurate effective properties only for strong particle-matrix bond conditions, and underpredicts the effective properties (compared to 3D unit cell computations) for weak interfaces. The computations based on real microstructure of an Al–TiB2 composite fabricated using spark plasma sintering (SPS) show that, for weak interfaces, the effective elastic properties under tension are different from those obtained under compression. Computations show that differences are the result of the local stress and strain fields, and contact mechanics between particles and the matrix. Preliminary measurements of the effective elastic properties using the ultrasonic pulse-echo technique and compression experiments support the trends observed in computational analysis.

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Section: Introductionmentioning

confidence: 99%