A new technique to characterize and predict laser cut striations

Pietro, P. Di; Yao, Y. Lawrence

doi:10.1016/0890-6955(94)00063-p

Cited by 34 publications

(15 citation statements)

References 9 publications

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“…9 The reasons for striation origination has become an object for numerous research papers. [10][11][12] Striations are inherent to both oxygen and inert gas cutting. There are many models proposed and reasons enumerated that may cause striations: fluctuations of laser power, unstable kinetics of the oxidation reaction, instability in melt film flow, instability in fusion front movement, etc.…”

Section: Introductionmentioning

confidence: 99%

Visualization of events inside kerfs during laser cutting of fusible metal

Yudin

Ковалев

2009

Journal of Laser Applications

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The subject of the research is mechanism of melt removal and striated roughness generation. Being the main obstacle limiting laser cutting process performance, these phenomena are widely discussed. Available theoretical descriptions are not conclusive, as they have nothing to be verified with. High temperatures and narrowness of the kerf severely limit visual access at a real facility. Observation will become possible if one wall of the kerf is made of glass. This possibility is utilized in present experiments, which reproduce the process at low temperatures. Rose’s alloy (melting at 96 °C) is cut by reduced power laser beam (below 300 W) and high-speed photographic recordings are done. The experiments are carried out for thick materials (10 and 20 mm) under cut. Examination of the video data brought out innovative views on the melt removal. The cutting front was noted to be upright. The striation structure was observed to be generated at a certain distance from the cutting front and without direct assistance of laser radiation. Adequacy of the model experiment to the real case was confirmed by direct comparison of surfaces and by analysis of similarity relations.

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Section: Introductionmentioning

confidence: 99%

Visualization of events inside kerfs during laser cutting of fusible metal

Yudin

Ковалев

2009

Journal of Laser Applications

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“…Considerable research studies were carried out to investigate the laser heating process [1][2][3][4][5][6][7][8]. The analysis of acoustic sensing for laser grooving and cutting was carried out by Sheng and Chryssolouris [9].…”

Section: Introductionmentioning

confidence: 99%

Laser cutting quality assessment and thermal efficiency analysis

Yilbaş

2004

Journal of Materials Processing Technology

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“…Here 3-D geometry of the cutting front, and temperature fields of the melt film have been evaluated. Pietro et al [122] have developed a theoretical model for the determination of surface roughness over a mild steel workpiece. Man et al [123] have theoretically analysed the effect of shape and dimensions of nozzle tip on dynamic characteristics of gas jets that finally affect the cut quality of high-pressure gas laser cutting process.…”

Section: Article In Pressmentioning

confidence: 99%