Influence of the microstructure on the subsurface and surface damage during lubricated rolling–sliding wear of sintered and sinterhardened 1.5%Mo–2%Cu–0.6%C steel: theoretical analysis and experimental investigation

Mekonone, Samuel Tesfaye; Pahl, W.; Molinari, A.

doi:10.1080/00325899.2018.1446706

Cited by 4 publications

(3 citation statements)

References 11 publications

(16 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accelerated wear tests can generally be motivated as long as the deformation and wear mechanisms are reproduced. In this study, the applied load is larger than in practice, and although cracks are found to initiate and propagate at a different rate, they propagate in the same manner as in materials tested for high cycle rolling contact fatigue, with and without slip [22,[25][26][27].…”

Section: Methodsmentioning

confidence: 99%

Crack initiation and early propagation in case hardened sintered PM steels under cyclic load

et al. 2022

View full text Add to dashboard Cite

In the present study, crack propagation through the case hardened region of two different PM steels manufactured with different powder size distributions and sintered at different temperatures has been investigated. EBSD was used to study the microstructure before and after case hardening, revealing the relationship between powder particle grains after sintering and prior austenite grains after case hardening. A novel approach was used to achieve short cracks (10-20 µm) with high repeatability. The cracks were then analysed using EBSD and SEM, revealing detailed and novel information about the crack propagation route in the materials. Both tested materials show the same crack propagation behaviour. If a prior grain/prior austenite boundary is present within an angle from the crack initiation site, the cracks will follow the boundary and thus propagate intergranular, suggesting that the preferred route of crack propagation in case hardened sintered steel is along these boundaries.

show abstract

Section: Methodsmentioning

confidence: 99%

Crack initiation and early propagation in case hardened sintered PM steels under cyclic load

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The material properties for the steel twin disc system (counter-face disc that is used to apply a compressive contact load and slave disk that is subjected to a contact load) are obtained for the analyses of Hertzian contact pressures and stress. The research was made using the dimensions and properties of two contacting materials where the geometry and material properties are obtained from the literature [19,20] as reported in Table 1. Radius of curvature R, mm 20 20…”

Section: Materials Property and Studied Geometrymentioning

confidence: 99%

“…The mean Hertzian pressure p o applied to the cylindrical contact surface is determined using the relation given by [19,26], as follows:…”

Section: Theoretical Hertzian Stress Analysismentioning

confidence: 99%

Numeric simulation of steel twin disc system under rolling-sliding contact

Gebretsadkan Brhane,

Tesfaye Mekonone

2023

tribomat

View full text Add to dashboard Cite

Various mechanical parts come into high-load rolling and sliding contact at the contact surface. Even with technological advancements, mechanical failures still occur. Rolling-sliding mechanical contact issues are the primary cause of over 90 % of surface and subsurface metallic failures and they are only becoming worse. Using discretised continuum 2D finite element methods (FEM), this research investigates the parametric contact effect of a steel twin disc system subjected to rolling-sliding contact at varied surface friction and comprehensive load condition. The equivalent von Mises stress distribution, contact pressure distribution and shift position of maximum subsurface stress on the contour region are all influenced by changes in compressive load and coefficient of friction, according to a numerical surface-to-surface contact simulation performed with Abaqus at mean Hertzian pressure. The maximal equivalent stress, for a given load, reaches a peak in the subsurface and moves farther away from the surface when the coefficient of friction decreases and comes close to the contact surface when the coefficient of friction increases. Consistency is shown by the analytical and numerical results.

show abstract

Modeling of Pore Parameters and Experimental Validation Using the Microstructure of 0.85Mo and 1.5Mo Prealloyed Sintered Steels

Mekonone

Molinari

Demlie

2021

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

View full text Add to dashboard Cite

Influence of the microstructure on the subsurface and surface damage during lubricated rolling–sliding wear of sintered and sinterhardened 1.5%Mo–2%Cu–0.6%C steel: theoretical analysis and experimental investigation

Cited by 4 publications

References 11 publications

Crack initiation and early propagation in case hardened sintered PM steels under cyclic load

Crack initiation and early propagation in case hardened sintered PM steels under cyclic load

Numeric simulation of steel twin disc system under rolling-sliding contact

Modeling of Pore Parameters and Experimental Validation Using the Microstructure of 0.85Mo and 1.5Mo Prealloyed Sintered Steels

Contact Info

Product

Resources

About