ANALYSIS ON ROOM TEMPERATURE TENSILE STRENGTH OF δ-Al_2O_3, FIBER / Al-12Si COMPOSITE

Room temperature tensile strength analysis of δ-Al2O3 fiber reinforced Al-12Si alloy matrix composite showed that this kind of composite existed Vmin (minimum volume fraction) and Vcrit, (critical volume fraction) under the experimental conditions used in this paper, and its σ'm (substrate strength),σc (tensile strength)-Vf (volume fraction of δ-Al2O3 fiber) linear equation, lc (critical length of fiber) and Ti (shear stress of composite) were worked out. While ROM prediction of composite is decided, it should be decided if its σum (strength of non-reinforced alloy) equals σ'm firstly, then correct conclusion can be obtained.