Houxiao Wang
Jiangsu University, China
Title: Experimental characterization and numerical simulation for ultrasonic-enhanced laser drilling/trepanning
Biography
Biography: Houxiao Wang
Abstract
Pulsed laser drilling/trepanning is widely used for high-precision high-efficiency microhole fabrication. However, a laser (e.g., a millisecond pulsed laser) itself usually cannot drill high quality holes due to recast layer formation. In this talk, a water-based ultrasonic-enhanced pulsed laser drilling/trepanning technique is accordingly reported to improve laser drilling performance. This cutting-edge technique is experimentally characterized and numerically analyzed, including experimental analysis for the influence of ultrasonic assistance on hole geometry, hole dimensions, recast layer formation, heat affected zone, microstructure and mechanical performance, also covering numerical analysis for the fields of temperature and residual stress resulting from laser drilling/trepanning. Effects of ultrasonic-laser parameters on laser drilling/trepanning efficiency and quality are also reported by comparing the drilled/trepanned holes without and using ultrasonic assistance.