Conditions of the Presence of Bimodal Amplitude Distribution of Two-Process Surfaces

Pawel Pawlus,Rafal Reizer,Michal Wieczorowski

doi:10.3390/ma13184037

Pawel Pawlus, Rafal Reizer + Show 1 more

Open Access

https://doi.org/10.3390/ma13184037

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Abstract

Two-process surfaces are functionally important. They contain plateau and valley parts. They are created by superimpositions of two one-process textures of Gaussian probability height distributions. It is expected that the resulting two-process surface would have bimodal height probability distribution. However, typically two-process textures have unimodal ordinate distribution. The present authors developed limiting conditions of presence of bimodal ordinate distribution. These conditions depend on the material ratio at the plateau-to-valley transition (the Smq parameter), and on the ratio of heights of the plateau and valley surface parts (Spq/Svq). Generated stratified textures and measured two-process surfaces of cylinder liners were taken into consideration.

Highlights

Surface topography is the fingerprint of a manufacturing process
Smq parameter further increased to 25%, onlydistance one peak was visible in the ordinate distribution—unimodal distribution took place
The amplitudes of both modes are similar for the Smq parameter of 10% (Figure 5c); the bimodal ratio increased compared to Figure 4c

Summary

Introduction

Surface topography is the fingerprint of a manufacturing process It affects functional properties of machine elements, such as contact, sealing, friction, and wear [1]. The obtained transitional surface topography consists of the machined surface and of created during the wear a fine surface with a Gaussian height probability ordinate distribution. Smq parameter, which is the material ratio at the transition point between plateau and valley. Smq parameter, which is the material ratio at the transition point between plateau and valley parts—. Sinceparameters these parameters are statistical, values can be obtained for 2D and profile. Because this method is based on theoretical presumptions, it can be applied in multiin multi-process surface modeling This ratio material ratio curve is to tribological of process surface modeling.

Theoretical Considerations

The Analysis of Generated

The Analysis of Measured Surfaces

Findings

Conclusions