Experimental investigation of fiber laser engraving operation on Al 6063, aluminium alloy

Abstract

Due to demands of high strength and light-weight materials such as Al 6063 aluminum alloy in industrial and aerospace application, it is necessary to choose machining operations by which the materials should be less affected. The present work shows how effectively the responses (HAZ, MRR and circularity) of fiber laser engraving (which is a non-traditional machining operation) varied with the input process parameters (power, scan speed, frequency and fill spacing). On the basis of Taguchi’s L16 orthogonal matrix and S/N ratio analysis, the optimum input parameter combinations were found out for each response individually. Finally, the improvement S/N ratio for closeness coefficient index (CCi) of the above responses was determined to be 3.83 dB by using TOPSIS.