Laser micro-polishing for metallic surface using UV nano-second pulse laser and CW laser

Jang, Pong-Ryol; Jang, Tae-Sok; Kim, Nam-Chol; Fu, Xing; kum-Hyok, Ji

doi:10.1007/s00170-015-7992-3

Cited by 28 publications

(8 citation statements)

References 14 publications

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“…They found that the surface roughness of Ti-based alloys could be diminished to 1 μm. Pong-Ryol et al [8] conducted laser micro-polishing experiments on two different surface forms of 316L stainless steel with a continuous wave laser beam. It was found that the surface roughness of the inclined plane and curved surface decreased by 56.4% and 57.3%, respectively.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on surface topography and microhardness of laser polished-hardened AISI D2 tool steel

Liu

Zhou

Wang

et al. 2022

Int J Adv Manuf Technol

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In this work, a laser polishing-hardening (LPH) method with integration and high efficiency for the treatment of AISI D2 tool steel was proposed, and the effects of laser hardening (LH), laser polishing (LP) and LPH treatments on the surface topography and microhardness were examined. The results show that LH method had a negligible effect on the surface roughness of the treated sample, while the surface roughness Ra of LP and LPH specimens was reduced by 74.6% and 80.9% respectively, indicating that the milled surface topography had been significantly improved, especially LPH was more effective in reducing the roughness. Besides, the polishing efficiency of LPH was 10 times that of LP approach. In terms of hardness improvement, the near-surface microhardness of LH and LPH samples increased by 1.5 times and 1.3 times respectively, and the effective hardened zone (EHZ) depth was 0.42 mm and 0.24 mm respectively, demonstrating that these two laser processing methods had a beneficial effect on the cross-section microhardness of D2 tool steel, while the increase of LP on the microhardness was insignificant. The comprehensive analysis of the surface morphology and microhardness of LPH specimen indicates that LPH was a feasible laser surface treatment method for D2 tool steel. On the premise of ensuring a high surface finish, the polishing efficiency can be remarkably improved, the subsurface microhardness and EHZ depth of processed specimen can be also significantly enhanced, which provided a feasible idea for the application of laser surface treatment technology in industrial mold production.

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Section: Introductionmentioning

confidence: 99%

A comparative study on surface topography and microhardness of laser polished-hardened AISI D2 tool steel

Liu

Zhou

Wang

et al. 2022

Int J Adv Manuf Technol

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“…Various zones are observed on the surface of a laser polished sample: heat-affected zone (HAZ), remelted layer, and liquid, as depicted in Figure 6 a [ 85 ]. A laser-polished surface is characterized by the amount of material removed; the polishing that removes 10–80 μm of material by continuous remelting is referred to as macro-laser polishing [ 86 , 87 , 88 ], while remelting depths in the range of 0.5–5 μm are referred to as micro-laser polishing [ 88 , 89 ].…”

Section: Alternative Micro-feature Fabrication Processesmentioning

confidence: 99%

Electropolishing and Shaping of Micro-Scale Metallic Features

2022

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Electropolishing (EP) is most widely used as a metal finishing process. It is a non-contact electrochemical process that can clean, passivate, deburr, brighten, and improve the biocompatibility of surfaces. However, there is clear potential for it to be used to shape and form the topology of micro-scale surface features, such as those found on the micro-applications of additively manufactured (AM) parts, transmission electron microscopy (TEM) samples, micro-electromechanical systems (MEMs), biomedical stents, and artificial implants. This review focuses on the fundamental principles of electrochemical polishing, the associated process parameters (voltage, current density, electrolytes, electrode gap, and time), and the increasing demand for using environmentally sustainable electrolytes and micro-scale applications. A summary of other micro-fabrication processes, including micro-milling, micro-electric discharge machining (EDM), laser polishing/ablation, lithography (LIGA), electrochemical etching (MacEtch), and reactive ion etching (RIE), are discussed and compared with EP. However, those processes have tool size, stress, wear, and structural integrity limitations for micro-structures. Hence, electropolishing offers two-fold benefits of material removal from the metal, resulting in a smooth and bright surface, along with the ability to shape/form micro-scale features, which makes the process particularly attractive for precision engineering applications.zx3

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“…Fibre-coupled lasers having laser power ranging from 100 to 300 W are usually adopted, and CW laser radiation is capable of processing from 10 to 80 mm from the top of the surface. The processing time typically ranges from 10 to 200 s cm −2 according to the starting surface roughness and the final desired roughness [24][25][26][27][28][29][30]. The roughness is influenced by different material characteristics i.e.…”

Section: Classification Of Laser Polishingmentioning

confidence: 99%

“…For micro polishing Nd:Yag lasers are generally involved. The energy density and the laser spot size are the main differences between micro-LP and other LP processes [29]. Shallow surface melting (SSM) and surface over melt (SOM) are the main mechanisms that allow improving the surface finishing.…”

Section: Classification Of Laser Polishingmentioning

confidence: 99%

Laser polishing of additively manufactured metal parts: a review

Manco

Cozzolino

Astarita

2022

Surface Engineering

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This paper provides a reliable state of the art of laser polishing process (LP), used to reduce surface roughness and to improve surface properties of additively manufactured metal parts. The motivation of this review and the introduction to the research topic are discussed in detail in the first part of the paper, then the fundamentals and the working principles of LP are exposed. A quantitative literature survey is also included, the main research streams are discussed, the most used laser sources and the most investigated materials are highlighted. The manuscript core is divided into five subchapters depending on the material to be polished: aluminium alloys, titanium alloys, steels, CoCr alloys and nickel alloys. Each of these discusses the laser adopted, the results obtained, the role of the process parameters and the physical phenomena ruling the process. The final section includes applications, advantages, direction of future work and main conclusions drawn.

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Laser micro-polishing for metallic surface using UV nano-second pulse laser and CW laser

Cited by 28 publications

References 14 publications

A comparative study on surface topography and microhardness of laser polished-hardened AISI D2 tool steel

A comparative study on surface topography and microhardness of laser polished-hardened AISI D2 tool steel

Electropolishing and Shaping of Micro-Scale Metallic Features

Laser polishing of additively manufactured metal parts: a review

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