FATIGUE STRENGTH OF EXTRUDED SiC_W/ LD_2 COMPOSITE AND ITS INFLUENCING FACTORS
挤压SiCw／LD2复合材料的疲劳强度及其影响因素

Studies were made on the fatigue strength of the extruded 16 v.-% SiC whiskers reinforced LD2 composite with two varieties of whisker orientation and two regimes of aging. Observations on their microstructure before or after fatiguing and on fatigue fracture surfaces were carried out under TEM and SEM.Experimental results show that the composite has a superior high-cycle fatigue strength to the unreinforoed alloy, especially, of the longitudinal orientation in comparison with transverse one.