On the evolution of microstructure and damage in a titanium matrix compositeSoboyejo, W.O. Proc. Conf. on Advanced Metal Matrix Composites for Elevated Temperatures, Cininnati, Ohio, USA, 20–24 Oct. 1991 (ASM International, Materials Park, Ohio 44073, USA, 1991) pp 141–155

Metal matrix composites (MMCs) are the new generation materials that combine both the metallic properties (ductility and toughness) and ceramic characteristics (high strength and modulus), leading to higher strength in shear and compression, at higher service temperatures. Titanium matrix composites possess light weight, high strength and good corrosion resistance and are used as structural materials in automobiles and aerospace industries. In the present study, in situ Ti-TiB composites were fabricated by reinforcing (2, 5, 10 and 20 wt. %) TiB2 powder (mean size <10 microns) into titanium powder (mean particle size ~26.58 μm) and subsequently consolidated by vacuum sintering at 1300 °C for 3 h. X-ray diffraction, scanning electron microscopy (SEM) and density measurements were carried out to characterize the prepared composites. The results showed that all compositions led to high density composites, and the hardness of the composites increased with an increase in the amount of reinforcement. The mechanism of vacuum sintering is yet to be understood in the consolidation of composites and the detailed evolution of microstructure needs to be analysed.

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Damage initiation and collapse behavior of unidirectional metal matrix composites at elevated temperatures

Computational Materials Science ◽

10.1016/j.commatsci.2013.06.024 ◽

2013 ◽

Vol 79 ◽

pp. 402-407 ◽

Cited By ~ 10

Author(s):

M.M. Aghdam ◽

S.R. Morsali

Keyword(s):

Metal Matrix Composites ◽

Metal Matrix ◽

Elevated Temperatures ◽

Matrix Composites ◽

Damage Initiation ◽

Collapse Behavior

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Mechanical Behavior of High Boron Content Al-B4C Metal Matrix Composites at Elevated Temperatures

Materials Science Forum ◽

10.4028/www.scientific.net/msf.706-709.631 ◽

2012 ◽

Vol 706-709 ◽

pp. 631-637 ◽

Cited By ~ 15

Author(s):

X. Grant Chen ◽

Lyne St-Georges ◽

M. Roux

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Metal Matrix Composites ◽

Metal Matrix ◽

Boron Content ◽

Elevated Temperatures ◽

Matrix Composites ◽

Neutron Absorber ◽

High Boron ◽

Thermal Stability Of

High boron content Al-B4C metal matrix composites are highly attractive as an excellent neutron absorber material for the storage of spent nuclear fuels. In the present paper, the mechanical properties of two composites with AA1100 matrix reinforced with 25 and 30 vol.% B4C at ambient and elevated temperatures have been investigated. The thermal stability of two composites at 300°C is experimentally determined. The microstructural features and the tensile fracture at different conditions are examined. It is found that the mechanical properties of both composites remain unchanged at 300°C after a long holding period up to 1000 h. The thermal stability of the mechanical properties of the composites is directly related to the stability of all microstructural compounds of the material. Finally, the effect of the tensile temperatures on the fracture mechanism is assessed.

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