Effect of Heat Treatment on the Surfaces Topography Tested at the Cavitation Erosion from Steel 16MnCr5

This paper analyzes, by comparison, the changes appeared in surface topography, for 16MnCr5 steel tested at cavitation erosion, subjected to different type of the heat treatments. The purpose of research, aimed at establishing a correlation between resistance to cavitation erosions and the surface roughness parameters, for various types of heat treatment (annealing, carburizing, Duplex treatment of carburizing, followed by the surface hardening by induction). Cavitation tests were conducted on a vibrator device with piezoceramic crystals, which fully complies with the requirements imposed by the ASTM G32 - 2010. Roughness parameters were measured using a Mitutoyo apparatus.

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Modeling of Surface Topography for Reduced Friction

Volume 3: Design; Tribology; Education ◽

10.1115/esda2008-59369 ◽

2008 ◽

Cited By ~ 2

Author(s):

Marko Sedlacˇek ◽

Bojan Podgornik ◽

Jozˇe Vizˇintin

Keyword(s):

Surface Roughness ◽

Surface Topography ◽

Surface Texturing ◽

Test Results ◽

Textured Surfaces ◽

Roughness Parameters ◽

Contact Conditions ◽

Surface Roughness Parameters ◽

Pin On Disc ◽

Texture Size

The aim of the present research was to investigate surface topography in terms of different surface roughness parameters and to correlate surface topography change to friction of contact surfaces. For this purpose, different 100Cr6 plate samples with different surface topography were prepared. Using different grades and combinations of grinding and polishing samples with similar Ra values, but different Rku and Rsk values were obtained. To evaluate influence of roughness parameters on friction and wear, dry and lubricated pin-on-disc tests were carried out under different contact conditions. Test results indicate that high Rku and negative Rsk values lead to decrease in friction. To investigate the effect of surface texturing on surface roughness parameters, real roughness profiles were virtually altered to achieve virtually textured surfaces. Using NIST SMATS softgauge for calculation of surface roughness parameters, virtually altered roughness profiles were investigated in terms of texture size, shape and spacing, and their influence on surface roughness parameters, especially on skewness and kurtosis. Lower diameter, higher spacing and wedge-shaped dimples reflect in higher Rku and more negative Rsk parameters.

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Research on the Surface Roughness Parameters of Micro-EDM

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.572.281 ◽

2013 ◽

Vol 572 ◽

pp. 281-286 ◽

Cited By ~ 1

Author(s):

Zhi Jie Chen ◽

Ji Hong Shen ◽

Yun Tao Dai

Keyword(s):

Surface Roughness ◽

Surface Morphology ◽

Surface Topography ◽

Evaluation Method ◽

Micro Edm ◽

Roughness Parameters ◽

Surface Roughness Parameters ◽

Evaluation Problem ◽

Lubrication Characteristics ◽

Morphology Characteristics

The surface topography errors of micro-EDM are mainly composed of surface roughness, surface waveness and so on. Research shows that the surface morphology provides a lot of useful information, which has serious influence on the friction and lubrication characteristics of the surface. However, for the micro-EDM surface topography evaluation problem, researchers have been using surface roughness parameters and evaluation method of mechanical process, which restrict the micro-EDM technology further development. On this account, the surface roughness parameters of micro-EDM have been deeply studied in this paper according to its technology characteristics and the surface morphology characteristics, therefore, the main researches and creative points are obtained, which the influence that the surface roughness of micro-EDM parts impact on their using performance is analyzed, and based on the surface morphology characteristics, some roughness evaluation parameters are given respectively according to peaks and valley, moreover, their numerical calculation are also gained.

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Influence of Steel Structure on Machinability by Abrasive Water Jet

Materials ◽

10.3390/ma13194424 ◽

2020 ◽

Vol 13 (19) ◽

pp. 4424 ◽

Cited By ~ 1

Author(s):

Irena M. Hlaváčová ◽

Marek Sadílek ◽

Petra Váňová ◽

Štefan Szumilo ◽

Martin Tyč

Keyword(s):

Heat Treatment ◽

Surface Roughness ◽

Mechanical Characteristics ◽

Water Jet ◽

Abrasive Waterjet ◽

Abrasive Water Jet ◽

Roughness Parameters ◽

Steel Microstructure ◽

Surface Roughness Parameters ◽

Awj Cutting

Although the abrasive waterjet (AWJ) has been widely used for steel cutting for decades and there are hundreds of research papers or even books dealing with this technology, relatively little is known about the relation between the steel microstructure and the AWJ cutting efficiency. The steel microstructure can be significantly affected by heat treatment. Three different steel grades, carbon steel C45, micro-alloyed steel 37MnSi5 and low-alloy steel 30CrV9, were subjected to four different types of heat treatment: normalization annealing, soft annealing, quenching and quenching followed by tempering. Then, they were cut by an abrasive water jet, while identical cutting parameters were applied. The relations between the mechanical characteristics of heat-treated steels and the surface roughness parameters Ra, Rz and RSm were studied. A comparison of changes in the surface roughness parameters and Young modulus variation led to the conclusion that the modulus was not significantly responsible for the surface roughness. The changes of RSm did not prove any correlation to either the mechanical characteristics or the visible microstructure dimensions. The homogeneity of the steel microstructure appeared to be the most important factor for the cutting quality; the higher the difference in the hardness of the structural components in the inhomogeneous microstructure was, the higher were the roughness values. A more complex measurement and critical evaluation of the declination angle measurement compared to the surface roughness measurement are planned in future research.

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Surface Roughness after Milling of the Al/CFRP Stacks with a Diamond Tool

Materials ◽

10.3390/ma14226835 ◽

2021 ◽

Vol 14 (22) ◽

pp. 6835

Author(s):

Elżbieta Doluk ◽

Anna Rudawska ◽

Józef Kuczmaszewski ◽

Izabela Miturska-Barańska

Keyword(s):

Surface Roughness ◽

Aluminium Alloy ◽

Surface Topography ◽

Feed Rate ◽

Metal Layer ◽

Composite Layer ◽

Periodic Pattern ◽

Roughness Parameters ◽

Surface Roughness Parameters ◽

Carbon Fibre Reinforced Polymer

This study presents the results of research on the surface quality of hybrid sandwich structures after milling with a diamond blade tool. It identifies the effects of feed and machining strategy on the roughness and topography of the surface. It provides an analysis of Ra and Rz surface roughness parameters as well as Sp, Sz, and Sv surface topography parameters. The processed object was a two-layer sandwich structure consisting of aluminium alloy 2024 and CFRP (carbon fibre-reinforced polymer) composite. The minimum values of the Ra and Rz surface roughness parameters were obtained on the aluminium alloy surface, whereas the maximum values were obtained on the CFRP surface. The same was true for the 3D surface roughness parameters—the lowest values of Sp, Sz, and Sv parameters were obtained on the surface of the metal layer, while the highest values were obtained on the surface of the composite layer (the maximum value of the Sp parameter was an exception). A surface topography analysis has revealed a targeted and periodic pattern of micro-irregularities for the vast majority of the samples considered. The statistical analysis shows that the surface roughness of the aluminium alloy was only affected by the feed rate. For the CFRP, the feed rate and the interaction of milling strategy and feed rate (Sfz) had a statistically significant effect. The obtained results provide a basis for designing such sandwich element processing technology, for which differences in roughness and topography parameters for the component materials are lowest.

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Control of nanogeometry of parts by the method of surface hardening

Science intensive technologies in mechanical engineering ◽

10.30987/2223-4608-2021-11-38-41 ◽

2021 ◽

Vol 2021 (11) ◽

pp. 38-41

Author(s):

Anatoliy Suslov ◽

Mikhail Shalygin

Keyword(s):

Surface Roughness ◽

Surface Hardening ◽

Roughness Parameters ◽

Surface Roughness Parameters ◽

Technological Methods

The problem of controlling the nanogeometry (sub-roughness) of the surface by technological methods of surface hardening is considered. The possibility of changing the sub-roughness by technological methods is shown. It is established that the surface roughness parameters decrease when using diffusion silicification.

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Influence of surface functional parameters on friction behavior and elastic–plastic deformation of grinding surface in mixed lubrication state

Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology ◽

10.1177/1350650118806375 ◽

2018 ◽

Vol 233 (6) ◽

pp. 870-883 ◽

Cited By ~ 1

Author(s):

Bin Zhao ◽

Song Zhang ◽

Jianfeng Li

Keyword(s):

Surface Roughness ◽

Surface Topography ◽

Mixed Lubrication ◽

Surface Model ◽

Roughness Parameters ◽

Solid Contact ◽

Friction Behavior ◽

Surface Roughness Parameters ◽

Simulation And Experiment ◽

Friction Performance

Mixed lubrication is a common lubrication regime in sliding contact and has received much attention in recent research. The influences of surface topography on friction performance in this lubrication state are significant owing to the coexistence of fluid–solid contact and solid–solid contact conditions. First, an accuracy surface model is built based on wavelet transform results. Then, the average Reynolds equation is revised for a grinding surface to be used in simulation. Third, four surface roughness parameters ( Sa, Sbi, S ci, and Svi) are selected to characterize surface topography. Additionally, the impacts on the solid–solid contact area, friction coefficient, and surface flattening are investigated. Finally, optimizations of surface roughness parameters directed toward energy saving and sliding stability are conducted and verified. Simulation and experiment methods are jointly applied to guarantee the accuracy of this research. The result of this study can provide theoretical support for machining contact surfaces.

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