Multi-response Optimization of Process Parameters in Laser Drilling of AA6061-TiB2/ZrB2 In Situ Composite Produced by K2TiF6-KBF4-K2ZrF6 Reaction System
The major involvement of this experimental work is to drill the holes of microsize on AA6061-TiB2/ZrB2 composite using fiber laser marking machine setup with input parameters as speed of the laser, laser power and standoff distance. The input parameters are optimized by Grey relational analysis method to identify the parameters to minimize the entry diameter, exit diameter and taper. The outcome of the Grey relational analysis indicates that higher laser speed, lower laser power and higher standoff distance are favorable range of parameters to attain minimum entry diameter, exit diameter and taper within the selected level of parameters. Laser power has significant influence on the multi-performance characteristics than the standoff distance and laser speed. The result of confirmation experiment illustrates that the response values obtained from the experiments and grey relational grade equation are with good correlation. Outcome of this experimental work helps to prefer the optimum laser drilling parameters in machining of AA6061-5% TiB2/ZrB2 composite.
KeywordsIn situ composites Laser drilling Entry diameter Exit diameter Taper Grey relational analysis
The authors acknowledge the financial support from Department of Science and Technology—Science and Engineering Research Board, New Delhi, India, under Fast Track Young Scientist scheme SB/FTP/ETA-0190/2014 dated 17.07.2015.
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