Abstract
The purpose of the study conducted was an analysis of the influence of pulse density per area unit of LSP on (7277AL Alloy) regarding the surface characterization, roughness achieved and microhardness. The samples, which were used in this investigation, are 7277Al Alloy. Specify the laser parameter used in this study effect on sample surface properties were studied. Such as laser energy, and laser pulses number the results reveal that the microhardness enhancement by 80%, while the surface roughness increased by 69% when laser energy of 360mj and the number of laser pulses of 100 pulse were applied. X-ray fluorescence analyses and optical microscope were carried out for all samples.
Highlights
The operated aluminum alloys in aircraft, automotive, marine and construction industries, in the past four decades, due to their inexpensive, good avoirdupois force ratio and high corrosion resistance [1,2,3]
Among the broad mixture of surface treatment explored for enhancing the properties of materials, laser surface medications were created around 35 years back in the USA with specific application to improve some mechanical properties [4]
Two processes need in laser surface treatment, which only needs filler material as alloying and cladding, and processes, which need produced heat such as melting and hardening [5]
Summary
The operated aluminum alloys in aircraft, automotive, marine and construction industries, in the past four decades, due to their inexpensive, good avoirdupois force ratio and high corrosion resistance [1,2,3]. Pulse pressure intensity against the base metal, different parameters of LSP can evolution of Microhardness, roughness, microstructure, wear resistance and friction coefficient. Their effect shows that increases of roughness after LSP; no ablation was observed; the microstructure has no remarkable variation; hardness and increases on the wear resistance as the pulse density increases. Hussein et al [14] were studied the effect the mechanical properties of laser treatment on, Vickers hardness and roughness of aluminum alloy. They treated a sample by employing Nd: YAG laser of energy 780mj, duration time eight ns, and wavelength 512 nm. No 10, 2019 of pulse density per area unit of LSP on
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