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

• Main Authors: Pawel Pawlus, Rafal Reizer, Michal Wieczorowski
• Format: Article
• Language: English
• Published: MDPI AG 2020-09-01
• Series: Materials
• Subjects: two-process surface; bimodal distribution; material ratio; parameters
• Online Access: https://www.mdpi.com/1996-1944/13/18/4037

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.