Effects of Environmental and Microstructural Variables on the Plastic Deformation of Metal Matrix Composites Under Changing Temperature Conditions

2009 ◽  
pp. 70-70-17 ◽  
Author(s):  
GS Daehn
Keyword(s):  
Plastic Deformation ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Composites ◽  
Temperature Conditions

scholarly journals Copper-Tantalum Metal Matrix Composites Consolidated from Powder Blends by Severe Plastic Deformation

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1010
Author(s):  
Zachary S. Levin ◽  
Michael J. Demkowicz ◽  
Karl T. Hartwig
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Equal Channel Angular Extrusion ◽  
Rate Sensitivity ◽  
Matrix Composites ◽  
Metal Powders ◽  
Tantalum Metal ◽  
Mechanical Bonding

We investigated the effectiveness of severe plastic deformation by equal channel angular extrusion (ECAE) for consolidation of metal powders into metal matrix composites. Equal volumes of copper (Cu) and tantalum (Ta) powders were consolidated at ambient temperature via different ECAE routes. Composites processed by ECAE routes 4E and 4Bc were also processed at 300 °C. The resulting materials were characterized by scanning electron microscopy (SEM) and compression testing. Processing by route 4Bc at 300 °C resulted in the highest compressive strength, lowest anisotropy, and least strain rate sensitivity. We conclude that the superior properties achieved by this route arise from mechanical bonding due to interlocking Cu and Ta phases as well as enhanced metallurgical bonds from contact of pristine metal surfaces when the material is sheared along orthogonal planes.

scholarly journals On the reinforcement homogenization in CNT/metal matrix composites during severe plastic deformation

2018 ◽  
Vol 136 ◽  
pp. 375-381 ◽  
Author(s):  
Katherine Aristizabal ◽  
Andreas Katzensteiner ◽  
Andrea Bachmaier ◽  
Frank Mücklich ◽  
Sebastian Suárez
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Composites

Size-dependent Probabilistic Micromechanical Damage Mechanics for Particle-reinforced Metal Matrix Composites

2010 ◽  
Vol 20 (7) ◽  
pp. 1021-1048 ◽  
Author(s):  
J.W. Ju ◽  
K. Yanase
Keyword(s):  
Plastic Deformation ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Damage Mechanics ◽  
Volume Averaging ◽  
Yield Function ◽  
Matrix Composites ◽  
Size Dependent ◽  
Dislocation Plasticity ◽  
Plastic Deformation Behavior

A size-dependent micromechanical framework is proposed to predict the deformation responses of particle-reinforced metal matrix composites by incorporating the essential features of the dislocation plasticity. Within the framework of probabilistic micromechanical formulation, the damage caused by the manufacturing process and by the external mechanical loading in the presence of thermal residual stresses is considered. The effective elastic moduli of four-phase composites, consisting of a ductile matrix and randomly located spherical intact or damaged particles are derived. Subsequently, the size-dependent plastic deformation behavior of particle-reinforced metal matrix composites is predicted with a dislocation theory. Specifically, the density of dislocations due to the thermal contraction misfit and the plastic deformation misfit is taken into consideration within the micromechanical methodology to account for the dislocation strengthening. To predict the overall elastoplastic damage behavior of composites, a size-dependent hybrid effective yield function is presented on the basis of the ensemble-volume averaging and the modified matrix yield strength. The comparisons between our predictions and available experimental data illustrate the potential capability of the proposed framework. Numerical simulations are also performed to exhibit the salient features of the proposed methodology.

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