Effective elastoplastic behavior of two-phase ductile matrix composites: A micromechanical framework

1996 ◽  
Vol 33 (29) ◽  
pp. 4267-4291 ◽  
Author(s):  
J.W. Ju ◽  
K.H. Tseng
Keyword(s):  
Matrix Composites ◽  
Two Phase ◽  
Elastoplastic Behavior

scholarly journals COMPUTATIONAL MICROSTRUCTURE-BASED ANALYSIS OF RESIDUAL STRESS EVOLUTION IN METAL-MATRIX COMPOSITE MATERIALS DURING THERMOMECHANICAL LOADING

2021 ◽  
Vol 19 (2) ◽  
pp. 241
Author(s):  
Ruslan Balokhonov ◽  
Varvara Romanova ◽  
Eugen Schwab ◽  
Aleksandr Zemlianov ◽  
Eugene Evtushenko
Keyword(s):  
Residual Stress ◽  
Metal Matrix ◽  
Spatial Scales ◽  
Three Dimensional ◽  
Matrix Composites ◽  
Two Phase ◽  
Irregular Shapes ◽  
The Matrix ◽  
Stress Formation ◽  
Mechanical Fragmentation

A technique for computer simulation of three-dimensional structures of materials with reinforcing particles of complex irregular shapes observed in the experiments is proposed, which assumes scale invariance of the natural mechanical fragmentation. Two-phase structures of metal-matrix composites and coatings of different spatial scales are created, with the particles randomly distributed over the matrix and coating computational domains. Using the titanium carbide reinforcing particle embedded into the aluminum as an example, plastic strain localization and residual stress formation along the matrix-particle interface are numerically investigated during cooling followed by compression or tension of the composite. A detailed analysis is performed to evaluate the residual stress concentration in local regions of bulk tension formed under all-round and uniaxial compression of the composite due to the concave and convex interfacial asperities.

Effect of load partition and particle distribution on micro-abrasive wear mapping of two-phase metal matrix composites

Wear ◽  
2013 ◽  
Vol 301 (1-2) ◽  
pp. 130-136 ◽  
Author(s):  
G.H.S. Gava ◽  
R.M. Souza ◽  
J.D.B. de Mello ◽  
M.C.S. de Macêdo ◽  
C. Scandian
Keyword(s):  
Abrasive Wear ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Particle Distribution ◽  
Matrix Composites ◽  
Two Phase

Microstructure and Deformation of Ti-22Al-23Nb Orthorhombic-Based Monolithic and Composite Titanium Aluminides

1994 ◽  
Vol 350 ◽  
Author(s):  
François-charles dary ◽  
Shiela R. Woodard ◽  
Tresa M. Pollock
Keyword(s):  
High Temperature ◽  
Titanium Aluminides ◽  
Matrix Composites ◽  
Low Oxygen ◽  
Microstructural Stability ◽  
Two Phase ◽  
Intermetallic Matrix ◽  
Three Phase ◽  
Intermetallic Matrix Composites ◽  
Temperature Exposure

AbstractA new class of intermetallic matrix composites (IMC's) based on orthorhombic titanium aluminides offer attractive properties for high-temperature structural components at temperatures up to 760°C. Results from an ongoing study on the microstructural stability and mechanical properties of the orthorhombic-based alloy Ti-22Al–23Nb (at%), in both monolithic and composite forms, are discussed. Oxygen acquired during processing or as a result of high-temperature exposure in air or vacuum has a pronounced influence on the microstructure of the monolithic and composite materials. Two-phase lath microstructures of ordered beta (βo) + orthorhombic (O) phases produced by processing low oxygen material above the beta transus are morphologically stable at 760°C. Conversely, in higher-oxygen three-phase microstructures containing O+βo+ α2(Ti3Al), lath coarsening and additional precipitation of α2 in oxygen-enriched sheet surface regions is observed. At 760°C/69MPa the two-phase lath microstructure has a higher creep resistance and lower tensile strength compared to the three-phase α2- containing microstructures of the higher oxygen material.

Plasticity of Particle-Reinforced Composites With a Ductile Interphase

1998 ◽  
Vol 65 (3) ◽  
pp. 596-604 ◽  
Author(s):  
K. Ding ◽  
G. J. Weng
Keyword(s):  
Composite System ◽  
Homogenization Theory ◽  
Two Phase ◽  
Elastoplastic Behavior ◽  
Reinforced Composite ◽  
Three Phase ◽  
The Matrix ◽  
Fluctuation Method ◽  
Ductile Interphase ◽  
Particle Reinforced Composite

A homogenization theory is developed to determine the overall elastoplastic behavior of a particle-reinforced composite with a ductile interphase. Unlike most existing homogenization theories which are primarily concerned with the ordinary two-phase composites, the present one is confronted with two ductile phases, with one enclosing the other. The theory is developed with the aid of a linear comparison composite using a field-fluctuation method to calculate an energy-based effective stress of the ductile phases. In order to examine its accuracy, an exact elastic-plastic analysis under dilatational loading is also developed, and it was found that, despite its simplicity, the theory could provide plausible estimates for the overall behavior of the three-phase composite. The theory is applicable to a composite system regardless whether the interphase is more ductile or stiffer than the matrix, and when the interphase is more ductile, it is shown that even the presence of a thin layer can have a very significant effect on the plasticity of the overall composite.

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