Journal ArticleDOI
Comparison of percussion laser drilling quality with and without water-based ultrasonic assistance
TLDR
In this article, a millisecond-pulsed percussion laser drilling technique using water-based ultrasonic assistance was reported for drilling nickel super-alloy GH4037 sheets with 12mm-thickness.About:
This article is published in Journal of Manufacturing Processes.The article was published on 2018-12-01. It has received 10 citations till now. The article focuses on the topics: Laser drilling & Ultrasonic sensor.read more
Citations
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Journal ArticleDOI
Surface integrity in metal machining - Part I: Fundamentals of surface characteristics and formation mechanisms
Zhirong Liao,Andrea la Monaca,James W. Murray,Alistair Speidel,Dmitrii Ushmaev,Adam T. Clare,Adam T. Clare,Dragos Axinte,Dragos Axinte,Rachid M'Saoubi +9 more
TL;DR: In this article, the state-of-the-art of surface integrity research with an emphasis on their governing mechanisms and emerging evaluation approaches is explored, where removal mechanisms are grouped by their primary energy transfer mechanisms; mechanical, thermal and chemical based.
Journal ArticleDOI
Monitoring and analysis of millisecond laser drilling process and performance with and without longitudinal magnetic assistance and/or assist gas
TL;DR: In this article, a real-time monitoring system based on high-speed photography was developed to analyze the process and performance of millisecond laser drilling with and without magnetic assistance and/or assist gas.
Journal ArticleDOI
Effect of water-based ultrasonic vibration on the quality of laser trepanned microholes in nickel super-alloy workpieces
TL;DR: In this paper, an ultrasonic-assisted laser trepanning technique was used for blind and through holes in nickel super-alloy samples, and the influence of ultrasonic vibrations on hole geometry, morphology, microstructure, recast layer thickness and mechanical performance was investigated through comparing holes trepanned with and without ultrasonic assistance.
Journal ArticleDOI
Failure analysis of tapered roller bearing inner rings used in heavy truck
Xiao-lei Xu,Zhi-wei Yu +1 more
TL;DR: In this paper, a detailed metallurgical analysis was performed on several tapered roller bearing inner rings during assembling with the intermediate shaft, and it was shown that the crack origins were all located on the overlapping zone of the laser marking area and grinding burn area, and the presence of the near-surface micro-grooves as sharp notches on the laser-marked small head end was mainly responsible for the fracture failure of inner rings.
Journal ArticleDOI
Laser drilling in nickel super-alloy sheets with and without ultrasonic assistance characterized by transient in-process detection with indirect characterization after hole-drilling
TL;DR: In this article, the effects of camera shooting angle, laser pulse energy, assist gas pressure and ultrasonic vibrations on laser drilling processes were investigated and compared systematically, and the effect of water-based ultrasonic assistance on transient material removal for laser drilling was first reported using high-speed camera observation with indirect characterization after hole-drilling.
References
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Journal ArticleDOI
Ultrasonic vibration-assisted femtosecond laser machining of microholes
Hongyu Zheng,Han Huang +1 more
TL;DR: In this paper, the authors describe an approach to improving laser hole drilling quality by exciting the work material with a high frequency ultrasonic vibrator during a femtosecond laser drilling process.
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Ultrasonic-Aided Laser Drilling of Aluminium-Based Metal Matrix Composites
W. S. Lau,Tai Man Yue,M. Wang +2 more
TL;DR: In this article, a combined ultrasonic-laser machining technique has been developed to improve the overall quality of laser drilled holes, which not only increases the depth-of-drill, but also improves the quality of the hole.
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Laser-Beam Helical Drilling of High Quality Micro Holes
TL;DR: In this paper, the rotational movement is produced using a Dove prism, mounted in a high speed, hollow shaft motor, and different kinds of holes are drilled and investigated with respect to hole-quality and drilling time.
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Melt expulsion during ultrasonic vibration-assisted laser surface processing of austenitic stainless steel
TL;DR: The results indicate that the proposed ultrasonic vibration-assisted laser processing can be designed for efficient material removal (laser machining) and improved equiaxed microstructure (l laser surface modifications) during materials processing.
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Ultrasonic-assisted underwater laser micromachining of silicon
TL;DR: In this paper, an ultrasonic-assisted underwater laser ablation has been comprehensively examined to overcome the limitations of the existing process, which uses ultrasound to vibrate water while a workpiece is being ablated by a laser beam in water.