Application of Correlation Function for Analysis of Surface Structure Shaping by Hybrid Manufacturing Technology

Dudzińska, Sara; Szydłowski, Michał; Grochała, Daniel; Bachtiak-Radka, Emilia

doi:10.1007/978-3-319-68619-6_62

Cited by 8 publications

(15 citation statements)

References 6 publications

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“…It has also been observed that surface defects and some porosity of samples after SLM-that are exposed during cutting-are also partly rolled (Figure 7a). A very similar relation can be observed in surface topographies obtained during the roller burnishing process, as reported in [26][27][28]. During machining with high feed rates, a high value of the tangential force to the surface is generated, which results in exceeding the critical tangential stresses of the material, and in turn leads to chunking (tearing by the cutting edge) its large fragments (Figure 7b).…”

Section: Measurements Of Gps Parameterssupporting

confidence: 82%

“…The results of the phase composition tests by the XRD method, conducted for the CoCr alloys fabricated using casting and SLM indicated the presence of γ (fcc) and ε (hcp) cobalt phases in both tested samples [3]. According to [7,27] in case of proper alloying, the microstructure of the CoCr alloys is composed mainly of γ-phase and carbides of the M 23 C 6 type. However, in numerous works concerning the cobalt-base alloys, their microstructure consists of a mixture of γ-Co and ε-Co phases [3,5,9,13].…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of Surface Topography after Face Turning of CoCr Alloys Fabricated by Casting and Selective Laser Melting

et al. 2020

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The machinability of hard-to-cut CoCr alloys manufactured by Selective Laser Melting (SLM) technology is not yet sufficiently studied. Therefore, this work focuses on evaluation of surface texture formation during face turning of CoCr alloy. As part of the research, two specimen types were subject to comparison: made with the application of conventional casting and manufactured by additive manufacturing—SLM. A number of analytical and experimental methods were employed to describe the specimen composition and morphology, as: X-Ray Diffraction Analysis (XRD), optical metallurgical microscopy, confocal optical microscopy, and Vickers hardness HV0.1 measurements. In the next stage, the measurements of surface topographies formed during turning in a range of variable cutting speeds and feeds were carried out. Ultimately the multi-factor MANOVA (Multivariate Analysis of Variance) illustrating the influence of manufacturing technology, cutting speed, and feed ratio on selected surface parameters of samples was made. It has been demonstrated that during face turning with feeds up to 0.15 mm/rev, the similar values of surface roughness height and material ratio curve parameters were reached for both tested CoCr alloys. However, in a range of higher feed values, the surface quality of CoCr samples fabricated by SLM was lower than that reached for CoCr after casting process.

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Section: Measurements Of Gps Parameterssupporting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Evaluation of Surface Topography after Face Turning of CoCr Alloys Fabricated by Casting and Selective Laser Melting

et al. 2020

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“…When burnishing axially symmetrical parts, the burnishing tool runs parallel or perpendicular to the marks left by the machining tool (a drill, a boring bar, or a turning tool) [ 1 , 5 , 6 ]. Recently, ball burnishing has also been successfully performed in a single operation in combination with milling on multi-axis CNC machining centres, using commercially available tools [ 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…In another experiment, burnishing of 41Cr4 steel caused a (maximum) 20-fold decrease in the Spk parameter [ 5 ], which may be indicative of an increase in abrasive wear resistance. The values of surface roughness parameters depend on the pressing force [ 8 , 10 ], burnishing speed [ 5 , 15 ], type of pre-machining operation [ 1 , 5 ], burnishing feed [ 8 , 9 , 15 ], and burnishing strategy [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Selected Properties of the Surface Layer of C45 Steel Parts Subjected to Laser Cutting and Ball Burnishing

Skoczylas

Zaleski

2020

Materials

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In this article, we report the results of experimental studies on the impact of ball burnishing parameters on the roughness, microstructure and microhardness of the surface layer of laser-cut C45 steel parts. We also analysed the distribution of residual stresses generated in the surface layer of these parts. Laser-cut parts often require finishing to improve the quality of their surface. The tests performed in this study were aimed at assessing whether ball burnishing could be used as a finishing operation for parts of this type. Ball burnishing tests were performed on an FV-580a vertical machining centre using a mechanically controlled burnishing tool. The following parameters were varied during the ball burnishing tests: burnishing force Fn, path interval fw and the diameter of the burnishing ball dn. Ball burnishing of laser-cut C45 steel parts reduced the surface roughness parameters Sa and Sz by up to 60% in relation to the values obtained after laser cutting. Finish machining also led to the reorganization of the geometric structure of the surface, resulting in an increase in the absolute value of skewness Ssk. This was accompanied by an increment in microhardness (maximum microhardness increment was ΔHV = 95 HV0.05, and the thickness of the hardened layer was gh = 40 µm) and formation of compressive residual stresses in the surface layer.

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“…It should also enable simple classification of digital measuring instruments. The current state of knowledge about surface characteristics, the accuracy and quality of measurements and above all their reproducibility, not only in the laboratory environment but also in the industry puts a lot of challenges [15,16]. The aim of this study was to identify the method for processing the point cloud using the digital data processing according to a prepared experiment plan of measurements on the AltiSurf A520 optical measuring instrument in the Surface Topography Laboratory at the West Pomeranian University of Technology in Szczecin.…”

Section: Introductionmentioning

confidence: 99%

Susceptibility of surface texture parameters to acquisition point clouds with digital data processing of data from optical measuring systems

et al. 2019

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Digital processing of the recorded point clouds on innovative surfaces could facilitate the operator’s planning of the metrological process and give more freedom in the assessment of the surface texture. The current state of knowledge about surface characteristics, precision and quality of measurements and especially the repeatability of measurements – not only in the laboratory environment but also in the industry pose a big challenge. The paper presents research works related to the identification of the impact of the method of acquisition point clouds using digital data processing on surface texture. The main assumption of the paper was to carry out, according to the prepared plan of the experiment, the series of sample measurements with the use of the optical measuring systems AltiSurf A520 in the Laboratory of Surface Topography at the West Pomeranian University of Technology in Szczecin. The next task was to determine the impact of the digital data processing strategy in order to identify the significance of the impact (conditions and methods of filtration), which in practice largely determines the repeatability and reproducibility of the parameter values of the geometry surface structure.

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Application of Correlation Function for Analysis of Surface Structure Shaping by Hybrid Manufacturing Technology

Cited by 8 publications

References 6 publications

Evaluation of Surface Topography after Face Turning of CoCr Alloys Fabricated by Casting and Selective Laser Melting

Evaluation of Surface Topography after Face Turning of CoCr Alloys Fabricated by Casting and Selective Laser Melting

Selected Properties of the Surface Layer of C45 Steel Parts Subjected to Laser Cutting and Ball Burnishing

Susceptibility of surface texture parameters to acquisition point clouds with digital data processing of data from optical measuring systems

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