Preparation,Structure and Properties of B4C Reinforced Al/Mg Laminated Composites
B4C reinforced Al/Mg layered composites(B4C@Mg/Al-MIL)were fabricated with AZ31 foil,Al powder and B4C powder as raw materials.Effects of hot-pressing temperature and B4C content on microstructure and mechani-cal properties of the composites were investigated and strengthening mechanism were described.The results indicate that the optimal performance is achieved with 40%B4C content in the mixed powder,where the bending strength is 347 MPa,specific strength is 192 kN·m/kg,and the impact toughness is 19 J/cm2,which are greatly enhanced com-pared to the matrix(Mg/Al-MIL),while tensile strength reaches 212 MPa.B4C particles promote the brittle phase to break and absorb energy,and induce the formation of multiple tunnel cracks through load transfer,improving the nega-tive impact of brittle intermetallic compounds on laminated composites.
NETL
NSTL
万方数据
