Study the effects of nitrogen ion implantation on structural and mechanical properties of AA7075

Nitrogen ions were implanted on the Aluminum Alloy 7075-T6 to study the structural and mechanical properties. The implantation was carried out at energy 1 MeV with ion doses ranging from 8 × 1014, 1.2 × 1015 and 5.2 × 1015 ions cm−2. Structural analysis of all the samples was done by x-ray Diffractometer (XRD) for the implanted ions. Surface morphology of all the samples was studied by Scanning Electron Microscopy (SEM). Changes in the surface and structure are directly related to the dose of ion implantation. To understand the mechanical properties universal Tensile Testing Machine was applied. Modifications in the crystalline structure of the material exhibit new properties to the lattice site. Effects on the crystallite size and stress generated by the damage strongly vary the yield stress, ultimate tensile strength and percentage elongation of the material. Hardness was tested by the Vickers Micro Hardness Tester. The result shows that the surface hardness obtained at room temperature by implanting nitrogen ions initially decreases and then systematically increases due to subsequent damage. Graph representing yield stress, ultimate tensile strength and hardness are strongly agreed with each other. The micro structure indicates the fractured surface after Tensile Test.