Effect of interface on mechanical property of steel-mushy Al-20Sn bonding plate

Abstract

The ratio of Fe-Al compound at interface, which could determine the quantity of Fe-Al compound at the interface of steel-mushy Al-20Sn bonding plate, was used to characterize the interfacial structure of steel-mushy Al-20Sn bonding plate quantitatively. The effect of ratio of Fe-Al compound at interface on interfacial shear strength was investigated perfectly. The results show that the relationship between ratio of Fe-Al compound at interface and interfacial shear strength is S =3.3+1.91t -0.0135 t² (where t is ratio of Fe-Al compound at interface and S is interfacial shear strength). When the ratio of Fe-Al compound at interface is 71%, the largest interfacial shear strength 70.9 MPa is got. This reasonable ratio of Fe-Al compound at interface is a quantitative criterion of interfacial embrittlement. When the ratio of Fe-Al compound at interface is higher than 71%, interfacial embrittlement will occur.

Keywords

interfacial structure / ratio of Fe-Al compound at interface / interfacial shear strength

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