FINITE ELEMENT MODELLING OF DEFORMATION AND STRESS IN THE COATING-SUBSTRATE SYSTEMS DURING SCRATCH TESTS
Journal Title: Tribologia - Year 2015, Vol 262, Issue 4
Abstract
The paper presents the influence of external loads carried in contact load conditions caused by a diamond indenter during scratch testing on stress distribution in a coating-substrate. The maximum tensile stress concentrations that lead to coating fracture and the stresses that cause substrate yield were analysed. Analyses were based on numerical experiments using the finite element method. The analyses were carried out for systems with different material properties of coatings and substrates and with different geometries of contacting elements. The studies allowed the determination of the significant impact of substrate yield strength and coating thickness on stress distribution and deformations of the whole system. The results of numerical analysis were compared with the results of experimental tests for uncoated substrates – X5CrNi18-10 austenitic and X20Cr13 ferritic steels and with 1 and 2 μm thick ZrN coatings. As a result of this complex analysis, the level of stress that leads to coating fracture was determined.
Authors and Affiliations
Kinga CHRONOWSKA-PRZYWARA, Marcin KOT
Keywords
Related Articles
- EP ID EP257254
- DOI -
- Views 65
- Downloads 0
CHARACTERIZATION OF NANO-GROOVED SUPERFICIAL LAYER OF COMPUTER MICROBEARINGS
This paper presents the measurement of superficial layer properties for a new undamaged journal and sleeve microbearing surfaces occurring in computer ventilator Kama Flow SP0825FDB12H 80 mm, in computer ventilator Xilen...
THE ROLE OF MOTION MONITORING IN EXPERIMENTS ON SLIDING FRICTION IN FLAT-ON-FLAT METALLIC CONTACTS
The paper describes an example of an experiment on sliding friction of metallic materials in which vibration measurement methods were used to identify friction induced vibrations occurring in sliding. The determination o...
THE INFLUENCE OF THE ADDITIVES OF PTFE OR Cu IN GREASE ON ITS LUBRICATION EFFICIENCY
The article presents the results of experimental studies on the effects of additives in grease on the lubrication efficiency (steel sliding nodes) of its compositions using one filler – powder PTFE (polytetrafluoroethyle...
INVESTIGATIONS OF FRICTION PROPERTIES OF SELECTED POLYURETHANE MATERIALS USED IN DRIVE WHEELS OF RAILWAYS
Suspended monorails and floor railways with friction drives play essential role in supply of machines, installations and menriding to faces. Their transport possibilities are limited by friction between the wheels and ra...
IDENTIFICATION OF FATIGUE DAMAGE OF METAL SHEETS MADE OF MATERIAL DD11 FROM AN ANALYSIS OF VIBRATION SIGNALS
This paper presents a method of identifying fatigue cracking of specimens made of material DD11 based on selected characteristics of the vibration signal. Acceleration of vibrations of the free end of a specimen was take...