Microstructure evolution during solidification of DRMMCs (Discontinuously reinforced metal matrix composites): State of art

Two Ti-based composites, viz. Ti/TiB and Ti-15Mo/TiB were produced by spark plasma sintering using a Ti-10wt.%TiB2 powder mixture at 1000°C or Ti-14.25(wt.)%Mo-5(wt.)%TiB2 powder mixture at 1400°C, respectively. Specimens of the metal-matrix composites (MMCs) were subjected to uniaxial compression in the temperature range from 500 to 1050°С to determine processing window. Processing maps for both MMCs were constructed and analyzed. Mechanical behavior and microstructure evolution of both MMCs during multiaxial forging (MAF) at 700°C and at a strain rate 10-3 s-1 were studied. The flow stress for the Ti-15Mo/TiB MMC during MAF was ∼2 times higher than that for the Ti/TiB composite. Microstructure evolution during MAF of Ti/TiB MMC was associated with continuous dynamic recrystallization of the titanium matrix and shortening of TiB whiskers by a factor of ~3. The Ti-15Mo/TiB composite microstructure after did not demonstrate the development of recrystallization.

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Microstructure evolution of single crystal WCp reinforced Ti–6Al–4V metal matrix composites produced at different cooling rates

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2009.04.057 ◽

2009 ◽

Vol 484 (1-2) ◽

pp. 108-112 ◽

Cited By ~ 18

Author(s):

Yanbin Chen ◽

Dejian Liu ◽

Liqun Li ◽

Fuquan Li

Keyword(s):

Single Crystal ◽

Metal Matrix Composites ◽

Microstructure Evolution ◽

Metal Matrix ◽

Matrix Composites ◽

Cooling Rates

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Metal-Matrix Composites and Porous Materials: Constitute Models, Microstructure Evolution and Applications

10.21236/ada376316 ◽

2000 ◽

Author(s):

P. P. Castafieda

Keyword(s):

Porous Materials ◽

Metal Matrix Composites ◽

Microstructure Evolution ◽

Metal Matrix ◽

Matrix Composites

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Microstructure evolution during AlSi10Mg molten alloy/BN microflake interactions in metal matrix composites obtained through 3D printing

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2020.157765 ◽

2020 ◽

pp. 157765

Author(s):

Anton S. Konopatsky ◽

Dmitry G. Kvashnin ◽

Shakti Corthay ◽

Ivan Boyarintsev ◽

Konstantin L. Firestein ◽

...

Keyword(s):

3D Printing ◽

Metal Matrix Composites ◽

Microstructure Evolution ◽

Metal Matrix ◽

Molten Alloy ◽

Matrix Composites

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Electron Microscopy of Metal-Matrix Composites

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100069016 ◽

1970 ◽

Vol 28 ◽

pp. 404-405

Author(s):

A. Lawley ◽

M. R. Pinnel ◽

A. Pattnaik

Keyword(s):

Electron Microscopy ◽

Metal Matrix Composites ◽

Metal Matrix ◽

Critical Evaluation ◽

Elastic Behavior ◽

Matrix Composites ◽

Directionally Solidified ◽

Fracture Characteristics ◽

Broad Program

As part of a broad program on composite materials, the role of the interface on the micromechanics of deformation of metal-matrix composites is being studied. The approach is to correlate elastic behavior, micro and macroyielding, flow, and fracture behavior with associated structural detail (dislocation substructure, fracture characteristics) and stress-state. This provides an understanding of the mode of deformation from an atomistic viewpoint; a critical evaluation can then be made of existing models of composite behavior based on continuum mechanics. This paper covers the electron microscopy (transmission, fractography, scanning microscopy) of two distinct forms of composite material: conventional fiber-reinforced (aluminum-stainless steel) and directionally solidified eutectic alloys (aluminum-copper). In the former, the interface is in the form of a compound and/or solid solution whereas in directionally solidified alloys, the interface consists of a precise crystallographic boundary between the two constituents of the eutectic.

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