Functionally graded materials (FGM), a material with grading function that its properties changed gradually with its position, is a material with a promising mechanical, electrical, magnetic, and catalytic properties where the application of this material is mostly limited to the fabrication method. As the technology advanced, there are plenty of method that nowadays could be used to produce high quality FGM. Cu-Ni FGM alloy is one of the promising materials with which the application could be ranging from biomedical to mechanical design. However, the study that addresses the impact on the difference of transition function (function that differentiate one FGM with another) and configuration is still lacking. Whilst the experimental study knows to take a lot of time, here we report the molecular dynamics (MD) simulation of Cu-Ni FGM alloy with different transition function and configuration. It is shown that the S-FGM (S for Sigmoid transition function) both with axial and radial configuration shows as the highest value of tensile strength. It is suggested that the homogeneity of the atoms at the failure site has contributed to these phenomena. However, although the Cu-Ni FGM alloy is brittle in nature, it can accommodate the slip mechanism with which the plastic deformation could be come out. This study has successfully addressed the effect of grading function, both transition and configuration, on the mechanical properties of Cu-Ni FGM alloy.

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