Al matrix composites reinforced by garphene were fabricated by two-step friction stir process associated with powder process

and influence of graphene content on the mechanical and conductive behavior of the composites was analyzed.The results reveal that the properties of Al matrix composites can be changed greatly with the addition of graphene.The composites is increased in hardness and is decreased gradually in the plasticity

while the tensile strength and electrical conductivity of the composites are increased firstly and then decreased

with the increase of graphene content.When graphene content is 3.7%

the ultimate tensile strength of the composites reach 146.5 MPa

which is 78.7% higher than that of the Al matrix without graphene under the same conditions.When graphene content is 1.3%

the electrical conductivity of the composites reach 30.62 MS/m

which is 53.4%higher than that of the Al matrix without grapheme.