Eric Rosset

University of Applied Sciences and Arts Western Switzerland · Systemic Tribology

Tube drawing with a fixed plug is investigated experimentally and numerically in order to optimise an industrial pass sequence. Tube drawings are performed on a laboratory drawing bench equipped with force, displacement and temperature sensors. The drawing limit of 316 LVM stainless steel (SS) tubes is determined by varying the plug position and th...

Si3N4–TiN based multi-layer laminates exhibit differences in residual stress between individual layers due to a variation of the thermal expansion coefficient between the layers. The residual stress distribution in these multi-layer laminates is known to improve the apparent macroscopic fracture toughness. In this work, the tribological behaviour o...

Laser cladding of AlSn alloy onto a mild steel have been carried out. The laser source was a continuous Nd-YAG. Due to similar boiling temperatures of feeding materials, cladded layers are free from porosity. Microstructural analyses show that aluminum and tin do not mix, except at the eutectic composition of 97% of tin. Eutectic compounds are show...

Tungsten CMP involves a synergistic interaction of electrochemical and tribological (wear) phenomena. So far, numerous studies have been conducted using static electrochemical measurements as well as some polishing experiments. In this study, we present some results obtained from carrying out potentiodynamic measurements and tribological experiment...

The tribocorrosion behaviour under sliding conditions of a 316L grade stainless steel in 0.5 M H2SO4 has been studied at two applied potentials in the passive range and in the cathodic range. It was found that the wear and frictional behaviour depends critically ion the applied potentials. The observed results can be interpretated by using the thir...

Oil/water emulsion are used as lubricant and coolant in the body-making operations during DWI (Drawn and Wall Ironed) beverage can manufacturing. The presence of water during forming operation may potentially lead to corrosion of the tools, which are usually made out of high speed steel (HSS) or carbide alloys such as WC-Co. The aim of the present...

Electroless and galvanic deposition are inexpensive and flexible methods for the fabrication of functional metal films on a wide range of substrates. These techniques are also suitable to produce metal matrix composite coatings such as self-lubricating coatings containing PTFE spheres in a metallic matrix. In the present work the tribological behav...

The corrosive wear behavior under sliding condition of a Fe25Cr alloy -a model material for stainless steel -in IM H 2SO 4 has been studied by using electrochemical techniques. An attempt is made to correlate quantitatively corrosion parameters with material loss under corrosive wear conditions. Surface characterisation has been done by Auger Elect...

The sliding wear and frictional behavior of Ni metal matrix composite coatings have been studied by using a reciprocating motion wear test rig. The effect of the heat treatment on structure and wear behavior is investigated. An attempt is made to elucidate the role of the interface between the particles and the matrix. Atomic Force Microscopy (AFM)...

Corrosion and tribocorrosion tests of iron in sulphuric acid at different concentrations were performed in order to elucidate the relationship between corrosion and wear and the role of surface films. Coefficient of friction, material loss rates and surface morphology of iron rubbing against alumina were monitored in sulphuric acid solutions of con...

High rate anodic dissolution of Fe, Fe13Cr, Fe24Cr, Cr and AISI type 304 stainless steel is studied in NaCl and NaNO3 using a flow channel cell with well-defined hydrodynamic conditions. The apparent valence for dissolution and the surface finish are investigated as a function of current density. Electrochemical etching experiments through photores...

Electrochemical micromachining (EMM) through photoresist masks of SS304 and Phynox using a jet cell and a neutral NaNO3 electrolyte is investigated. Results show that EMM is suitable for the shaping of highly corrosion-resistant alloys which are not readily machined chemically. The main difficulty of EMM results from the uneven attack of differentl...

The use of pulsating current to polish die steels in neutral solutions was investigated. Experiments were performed in a flow channel cell by studying the influence of experimental parameters on surface roughness. Results indicate that the proper selection of pulse parameters can lead to a high smoothing rate and a good surface finish using nitrate...

A single-pulse heating method for studying chemical surface reactions of extreme pressure additives is described. The method uses a single high intensity pulse of short duration in conjunction with highly sensitive surface analytical tools such as Auger electron spectroscopy and X-ray photoelectron spectroscopy for monitoring reaction products. The...