Measurement Assurance of Additive Manufacturing on the Example of Laser Surface Polishing Products by Remelting

2021 ◽  
Vol 1037 ◽  
pp. 32-40
Author(s):  
Anastasia A. Kransutskaya ◽  
Vladislav A. Funtikov ◽  
Anthony B. Syritskii ◽  
Alexander S. Komshin
Keyword(s):  
Laser Surface ◽  
Fibre Laser ◽  
Contactless Method ◽  
Laser Remelting ◽  
Additive Technology ◽  
Laser Polishing ◽  
Measurement Assurance ◽  
Surface Polishing ◽  
Technological Complex ◽  
Ytterbium Fibre Laser

The article presents the results of studies of the surfaces of parts processed by the contactless method of laser polishing. The results of technological surface treatment using a laser technological complex based on an ytterbium fibre laser with a power of 5 kW are presented. The results of studies of the surface roughness of the samples after laser treatment, including the non-uniform character due to the redistribution of the liquid metal melt over the surface, are shown. Requirements for metrological support of additive technology have been developed using the example of the process of laser remelting in order to improve quality and further automation.

scholarly journals Laser surface texturing of tool steel: textured surfaces quality evaluation

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Peter Šugár ◽  
Jana Šugárová ◽  
Martin Frnčík
Keyword(s):  
Laser Beam ◽  
Tool Steel ◽  
Surface Texturing ◽  
Scanning Speed ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Fibre Laser ◽  
Textured Surfaces ◽  
Machined Surface ◽  
Ytterbium Fibre Laser

Abstract In this experimental investigation the laser surface texturing of tool steel of type 90MnCrV8 has been conducted. The 5-axis highly dynamic laser precision machining centre Lasertec 80 Shape equipped with the nano-second pulsed ytterbium fibre laser and CNC system Siemens 840 D was used. The planar and spherical surfaces first prepared by turning have been textured. The regular array of spherical and ellipsoidal dimples with a different dimensions and different surface density has been created. Laser surface texturing has been realized under different combinations of process parameters: pulse frequency, pulse energy and laser beam scanning speed. The morphological characterization of ablated surfaces has been performed using scanning electron microscopy (SEM) technique. The results show limited possibility of ns pulse fibre laser application to generate different surface structures for tribological modification of metallic materials. These structures were obtained by varying the processing conditions between surface ablation, to surface remelting. In all cases the areas of molten material and re-cast layers were observed on the bottom and walls of the dimples. Beside the influence of laser beam parameters on the machined surface quality during laser machining of regular hemispherical and elipsoidal dimple texture on parabolic and hemispherical surfaces has been studied.

scholarly journals Laser Polishing of Additive Manufactured 316L Stainless Steel Synthesized by Selective Laser Melting

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 991 ◽  
Author(s):  
Muhannad Obeidi ◽  
Eanna McCarthy ◽  
Barry O’Connell ◽  
Inam Ul Ahad ◽  
Dermot Brabazon
Keyword(s):  
Stainless Steel ◽  
Laser Beam ◽  
316L Stainless Steel ◽  
Processing Parameters ◽  
Laser Surface ◽  
Beam Irradiation ◽  
Laser Melting ◽  
Laser Polishing ◽  
Surface Polishing ◽  
Laser Beam Irradiation

One of the established limitations of metal additive manufacturing (AM) methods, such as selective laser melting (SLM), is the resulting rough surface finish. Laser polishing is one method that can be used to achieve an improved surface finish on AM printed parts. This study is focused on the laser surface polishing of AM parts using CO2 laser beam irradiation. Despite the fact that several researchers have investigated the traditional abrasive polishing method, there is still a lack of information reporting on the laser surface polishing of metal parts. In this study, AM 316L stainless steel cylindrical samples were polished using CO2 laser beam irradiation in continuous wave (CW) working mode. Two design of experiment models were developed for the optimization of the input processing parameters by statistical analysis of their effect on the resulting roughness. The processing parameters investigated were the laser beam power, the rotational speed of the sample, the number of laser scan passes, the laser beam focal position, and the percentage overlap of the laser tracks between consecutive passes. The characterization of the measured roughness and the modified layer microstructure was carried out using 3D optical and scanning electron microscopy (SEM). A maximum reduction of the roughness from 10.4 to 2.7 µm was achieved and no significant change in the microstructure phase type and micro-hardness was observed.

Optimization of erbium-ytterbium fibre laser with simple double-clad structure

2006 ◽  
Author(s):  
Pavel Peterka ◽  
Ivan Kašík ◽  
Václav Kubeček ◽  
Vlastimil Matějec ◽  
Miloš Hayer ◽  
...  
Keyword(s):  
Fibre Laser ◽  
Ytterbium Fibre Laser

Laser plume evolution in the process of nanopowder preparation using an ytterbium fibre laser

2016 ◽  
Vol 46 (9) ◽  
pp. 821-828 ◽  
Author(s):  
V V Osipov ◽  
G S Evtushenko ◽  
V V Lisenkov ◽  
V V Platonov ◽  
A V Podkin ◽  
...  
Keyword(s):  
Fibre Laser ◽  
Laser Plume ◽  
Ytterbium Fibre Laser

Study on Corrosion Resistance and Mechanical Property of Welding HAZ Treated by Laser Surface Remelting

2013 ◽  
Vol 734-737 ◽  
pp. 2346-2350 ◽  
Author(s):  
Yan Li Li ◽  
Jia Rui Qi ◽  
Dan Feng Zhang ◽  
Ji Liu ◽  
Chao Li
Keyword(s):  
Mechanical Property ◽  
Corrosion Resistance ◽  
Corrosion Current ◽  
Processing Parameters ◽  
Electrochemical Analysis ◽  
Constructional Steel ◽  
Orthogonal Test ◽  
Laser Surface ◽  
Laser Remelting ◽  
Laser Surface Remelting

Welding is a main joint way of the alloy constructional steel. However, the welding HAZ is very sensitive to corrosion. In order to increase the corrosion resistance of the welding HAZ without reducing mechanical property of the parts simultaneously, the laser surface remelting was used to treat the welding HAZ in this study. According to the results of the orthogonal test, the optimized processing parameters were obtained. Based on the electrochemical analysis, the corrosion current of 30CrMnSi welding HAZ can be decreased by laser remelting technology. The corrosion resistance of the HAZ can be improved effectively. At the same time, the mechanical property of the treated welding HAZ was better compared with the untreated.

Sign in / Sign up

Export Citation Format

Share Document