Abstract
Compressive creep behaviour of two composites with magnesium alloy AS21 matrix reinforced by short fibres and short fibres&coarse SiC particles was investigated with the aim to show the influence of the orientation of stress axis to the planar distribution of fibres in the composites. Experiments were performed at 523 K. Strong dependence of time to rupture and minimum creep rate on this orientation was observed in both composites. Stress sensitivity parameters of the minimum creep rate and the time to rupture do not probably depend on the orientation of acting stress to planar fibre distribution in the composites. A specific form of the creep rupture pattern of specimens was observed and is briefly discussed.

Key words
creep, metal matrix composites, magnesium alloy, reinforcing fibres

Full text (1342 KB)