Surface Structuring by Laser Remelting (WaveShape): Microstructuring of Ti6Al4V for a Small Laser Beam Diameter and High Scan Speeds

Temmler, André; Qi, Shihua

doi:10.3390/mi12060660

Cited by 4 publications

(5 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For scan speeds from 10 mm/s to 100 mm/s, we achieved a well-defined groove pattern with a max channel depth (Rz) of about 80 µm; on the other hand, for scan speeds higher than 500 mm/s, the groove depth was almost null, apart from a point at the edge region (also textured vertically in the passage from one line spacing to another; see Figure 1). This behavior could be ascribed to laser remelting effects, which mainly depend on material composition, hardness, and friction degree [28][29][30]. Overall, as expected, the Rz value decreases upon increasing the scan speed for all the investigated samples.…”

Section: Profilometric Data and Sem Characterizationsupporting

confidence: 70%

Wetting Behavior Driven by Surface Morphology Changes Induced by Picosecond Laser Texturing

Corsaro,

Orlando,

Costa

et al. 2024

Materials

View full text Add to dashboard Cite

The laser surface texturing (LST) technique has recently been used to enhance adhesion bond strength in various coating applications and to create structures with controlled hydrophobic or superhydrophobic surfaces. The texturing processing parameters can be adjusted to tune the surface’s polarity, thereby controlling the ratio between the polar and dispersed components of the surface free energy and determining its hydrophobic character. The aim of this work is to systematically select appropriate laser and scan head parameters for high-quality surface topography of metal-based materials. A correlation between texturing parameters and wetting properties was made in view of several technological applications, i.e., for the proper growth of conformal layers onto laser-textured metal surfaces. Surface analyses, carried out by scanning electron microscopy and profilometry, reveal the presence of periodic microchannels decorated with laser-induced periodic surface structures (LIPSS) in the direction parallel to the microchannels. The water contact angle varies widely from about 20° to 100°, depending on the treated material (titanium, nickel, etc.). Nowadays, reducing the wettability transition time from hydrophilicity to hydrophobicity, while also changing environmental conditions, remains a challenge. Therefore, the characteristics of environmental dust and its influence on the properties of the picosecond laser-textured surface (e.g., chemical bonding of samples) have been studied while monitoring ambient conditions.

show abstract

Section: Profilometric Data and Sem Characterizationsupporting

confidence: 70%

Wetting Behavior Driven by Surface Morphology Changes Induced by Picosecond Laser Texturing

Corsaro,

Orlando,

Costa

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…According to several research studies, the result of femtosecond laser machining is influenced by several factors [ 4 , 17 , 21 , 22 , 23 ]. Prominent surface quality can be achieved on thin (>0.5 mm) materials.…”

Section: Methodsmentioning

confidence: 99%

“…However, for thicker materials, it is much more difficult to achieve a similar result. As far as the parameters are concerned, there is no consensus among researchers: different pulse widths, frequencies, and power values effect various results [ 4 , 7 , 10 , 21 , 22 , 24 ]. By using a femtosecond laser, controlled material removal processing can be expected with a quality, uniform surface, where burr formation is minimal.…”

Section: Methodsmentioning

confidence: 99%

“…Zuev et al investigated the morphology of the multi-layered structures [ 1 ]. Due to the pseudoplastic behavior, next to the cavity wall, highly oriented layers developed where the shear rate is higher thanks to the fountain flow, while inside the melt front, the layers were less oriented [ 2 , 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

“…The replication quality of molded parts or even their mechanical properties can be improved by optimizing process parameters and controlling material flow. Therefore, an optimization approach has been used to improve the mechanical properties of the molded part made by polypropylene (PP) [ 4 , 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Femtosecond-Laser-Structured Injection Molding Tool on Mechanical Properties of the Manufactured Product

Kun

Weltsch

2021

Polymers

View full text Add to dashboard Cite

During the injection molding process, the melt travels with a flow due to friction. As the velocity of the layers next to the wall is less than that of those flowing in the middle of the channel, a fountain flow is formed at the melt front. The temperature of the polymer surface decreases from the melt temperature to the contact temperature after contacting the mold surface. Based on all this, a complex shell–core structure is formed in injection-molded products, which can be influenced by the processing parameters and the surface of the tool insert. This paper focuses on investigating the effect of the microstructures replicated from the insert to the polymer product on its mechanical properties. During the research, two microstructured surfaces were created, with different effects on the melt flow formed by the femtosecond laser. These were compared with a ground insert to analyze the effects. For examining the effect of technological variables on the mechanical properties, an experimental design was used. The structure created by the femtosecond laser on the surface of the tool influenced the mechanical properties of the polymer products. Recognizing the effect of microstructures on the melt front and, through this, the change in mechanical properties, a predefined polymer product property can be achieved.

show abstract

Surface Roughness Improvement by Sliding Friction Burnishing of Parts Produced by Selective Laser Melting of Ti6Al4V Titanium Alloy

2022

View full text Add to dashboard Cite

Selective laser melting is a frequently used, powder bed fusion additive manufacturing technology for producing metallic parts. However, appropriate surface quality cannot be achieved, so post-processing is often necessary. Subsequent machining of surfaces serves multiple objectives such as improvement of dimensional accuracy, changing surface roughness and modification of the residual stress state for higher surface hardness. Beyond its several advantageous properties, Ti6Al4V material has, as its weaknesses, low tribological behavior and wear resistance. Sliding friction burnishing is a conventional chipless and coolant-free environmentally conscious technology for surface modification that is appropriate for simultaneously decreasing surface roughness and increasing surface hardness. Until now, there has been a research gap regarding the diamond burnishing of selective laser melted Ti6Al4V parts. In this study, we investigated how the surface roughness of selective laser melted parts can be modified via sliding friction burnishing. 2D and 3D characteristics of surface roughness were measured by a chromatic roughness measuring device. Indices of surface roughness improvement were defined and studied as a function of selective laser melting parameters. Optimal manufacturing parameters of laser power—P = 280 W and scanning speed u = 1200 mm/s—for effective surface improvement via burnishing are proposed.

show abstract

Surface Structuring by Laser Remelting (WaveShape): Microstructuring of Ti6Al4V for a Small Laser Beam Diameter and High Scan Speeds

Cited by 4 publications

References 38 publications

Wetting Behavior Driven by Surface Morphology Changes Induced by Picosecond Laser Texturing

Wetting Behavior Driven by Surface Morphology Changes Induced by Picosecond Laser Texturing

Effect of Femtosecond-Laser-Structured Injection Molding Tool on Mechanical Properties of the Manufactured Product

Surface Roughness Improvement by Sliding Friction Burnishing of Parts Produced by Selective Laser Melting of Ti6Al4V Titanium Alloy

Contact Info

Product

Resources

About