پديدآورندگان :
Khalili S.M.R smrkhalili2005@gmail.com Department of Mechanical Engineering, K.N. Toosi University of technology, Tehran, 1999143344, Iran , Torabian M Department of Mechanical Engineering, K.N. Toosi University of technology, Tehran, 1999143344, Iran , Saeedi A Department of Mechanical Engineering, K.N. Toosi University of technology, Tehran, 1999143344, Iran
كليدواژه :
Functionally graded material , powder metallurgy , microstructure , density of FGM , bending strength
چكيده فارسي :
Functionally graded materials (FGMs) are a new type of composites with
non-homogenous microstructure and variable mechanical properties. The physical and mechanical
properties of FGMs vary in the thickness direction continuously. In this research, powder
metallurgy method has been used to fabricate functionally graded Copper-Iron specimens with
more than 97% relative density in 5 layers. First, the metal powder layers are pressed under cold
iso-static pressure (CIP) at 400 MPa. Then the brittle pressed specimens are sintered with a defined
cycle at 1000oC in a proper vacuum furnace. The composition of layers is changed by a linear
function from the Cu rich face to the Fe rich one. The micrographs have been investigated to
observe the microstructure of FGM, morphology and composition between the layers. Three-point
bending tests were conducted in order to obtain the mechanical properties of the fabricated FGM
specimens. The resulting functionally graded Cu-Fe shows improved mechanical properties in
comparison with pure iron and copper.
