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Abstract
Aluminium alloy target samples were irradiated with different number of shots of Nd-YAG laser ranging from 100 to 500 with incremental steps of 100 shots under vacuum (10-6 torr). The optical, structural and tensile properties of Al (Alloy) irradiated by Nd-YAG laser were investigated by optical microscope, X-ray diffractometer (XRD) and tensile testing machine. Laser ablation of the specimen resulted in boiling, splashing and crater formation on its surface. The crater size increases initially and then decrease gradually by increasing number of laser shots. The crater depth of laser irradiated Al (Alloy) increased by enhancing the laser shots. An anomalous trend of crystallite size, peak intensity, and dislocation line density of the irradiated specimen with different number of shots was observed by XRD comparison analysis. Mechanical properties of both irradiated and un-irradiated specimens were investigated using tensile testing machine. The average value of surface hardness 28.4 MPa of un-irradiated specimens was found. Increasing the number of laser shots, ultimate tensile strength and fracture strength were also varying.
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