Study on the variation of recast layer in laser trepan drilling by millisecond Nd:YAG laser
Ferroelectrics, 2020Recast layer (RL) is a major defect in laser drilling of micro holes. In this study, some methods to reduce RL in micro-hole drilling were carried out by using a pulsed Nd:YAG laser (λ = 1.06 µm) o...
Wenqiang Duan, Zhengjie Fan, Yifei Zhang
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Dynamic change process of a recast layer in Nd:YAG millisecond laser trepan drilling
Journal of the Optical Society of America B, 2020Laser drilling has extensive applications in modern industry. To improve the quality of microholes drilled by a high-power millisecond pulsed laser, the laser trepan drilling technique was studied in depth in this paper. Processing parameters, such as trepanning speed (TS) and rotation number (RN), were experimentally studied for their influence on a ...
Wenqiang Duan +4 more
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Surface repairing and strengthening of TC4 ally with recast layer by ultrasonic shot peening
Materials Letters, 2020Abstract In this paper, ultrasonic shot peening (USP) is used as a surface repairing and strengthening method for TC4 ally with recast layer produced by electrical discharge machining (EDM), and the influence of USP on the surface roughness, microstructure, and corrosion behavior of recast layer was studied.
Chaorun Si, Bingbing Duan, Jin Cai
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Electrochemical corrosion assisted laser drilling of micro-hole without recast layer
Optik, 2020Abstract High-power pulsed laser is an efficient tool for drilling micro-holes on metal, but due to the melt ejection dominated material removal mechanism, recast layer can hardly be avoided. This paper proposes to use electrochemical corrosion as a kind of postprocessing technique to remove the laser induced recast layer.
Wenqiang Duan +5 more
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Effect of interpulse voltage on recast layer machined by HSWEDM
Materials and Manufacturing Processes, 2023Ming Zhang, Mingbo Qiu, Zhidong Liu
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Fabrication of hole without recast layer on coated alloy by using laser and electrochemistry
Optik, 2019Abstract Fabrication of hole by using laser and electrochemistry (FH-LE) is presented in this study. First, under electrolyte, a coating hole is milled by the photochemical effect of ultraviolet laser. Second, an alloy hole is machined by electrochemical machining (ECM) based on the coating hole.
Aixi Sun, Yubo Chang, Hongjun Liu
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Research on removal characteristics of recast layer of laser-electrolytic machining on small holes
The International Journal of Advanced Manufacturing Technology, 2018To address defects in the recast layer and microcracks in laser drilling, this study adopted laser-electrolytic composite machining technology to conduct a boring test on nickel-based superalloy In718 through flushing outside the ring electrode and hydrostatic machining.
Xuezhi Li, Jianping Zhou, Kedian Wang
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Study of removing the recast layer by electrochemical dissolution with wire low feedrate in WEDM
The International Journal of Advanced Manufacturing Technology, 2019One characteristic of WEDM surface is that it is covered with numerous craters and re-solidified materials, forming the recast layer which deteriorates the surface quality and other properties such as fatigue strength. In this research, a method combining WEDM and electrochemical dissolution together in a simple process is proposed and studied.
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Elimination of recast layer and microcracking in laser machining with femtosecond pulses
CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics, 2005X. Liu, X. Chen, W.T. Lotshaw, A.C. Tien
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Effects of recast layer on fatigue performance of laser-drilled holes in nickel-based superalloy
Journal of Materials Processing Technology, 2023Huang Yuan, Tinglian Zhang
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