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Olsson, Mikael
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Publications (10 of 36) Show all publications
Olsson, M. & Cinca, N. (2024). Mechanisms controlling friction and material transfer in sliding contacts between cemented carbide and aluminum during metal forming. International journal of refractory metals & hard materials, 118, Article ID 106481.
Open this publication in new window or tab >>Mechanisms controlling friction and material transfer in sliding contacts between cemented carbide and aluminum during metal forming
2024 (English)In: International journal of refractory metals & hard materials, ISSN 0263-4368, Vol. 118, article id 106481Article in journal (Refereed) Published
Abstract [en]

Cold forming of aluminum alloys is frequently associated with problems related to severe adhesion and material transfer onto the forming tools which results in high friction forces and negatively affects the surface quality of the formed parts, a phenomenon frequently named galling. In the present study, well controlled laboratory tests using a scratch testing equipment have been performed to evaluate the friction characteristics and investigate the mechanisms controlling the initial transfer of aluminum in dry sliding contact with five different cemented carbide grades. In the tests, an aluminum pin (representing the work material) with a conical tip slides against a flat, fine-polished, cemented carbide surface (representing the tool). During sliding, the mechanical contact results in plastic deformation and flattening of the work material against the tool surface, thus simulating a metal forming contact. The small scale and well-defined tribo contact in combination with post-test surface characterization using optical surface profilometry, high resolution SEM and EDS makes it possible to evaluate the influence of material transfer on the friction characteristics.The results show that sub-mu m surface irregularities in the cemented carbide surface trigger mechanical interaction with the softer aluminum surface which promotes aluminum transfer to the cemented carbide surface resulting in high friction. Common surface irregularities, promoting aluminum transfer, are sharp edges of slightly protruding carbide grains, surface steps in connection to binder phase pockets, surface steps in connection to surface pores, etc. It should be noted that even very small surface steps, < 20 nm in height, constitute efficient cutting edges able to effectively cut off the passing aluminum material and thus have a very strong impact on material transfer. In contrast, the effect of carbide composition, e.g. the presence of cubic carbides of different composition, seems to be of minor importance to reduce the adhesion and the tendency to material transfer.

Place, publisher, year, edition, pages
Elsevier, 2024
Keywords
Cemented carbide, Aluminum, Sliding contact, Material transfer, Friction
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
urn:nbn:se:du-47604 (URN)10.1016/j.ijrmhm.2023.106481 (DOI)001114627200001 ()2-s2.0-85181743565 (Scopus ID)
Available from: 2023-12-28 Created: 2023-12-28 Last updated: 2024-01-15Bibliographically approved
Jayamani, J., Elo, R., Surreddi, K. B. & Olsson, M. (2023). Electrochemical and passivation behavior of a corrosion-resistant WC-Ni(W) cemented carbide in synthetic mine water. International journal of refractory metals & hard materials, 114, Article ID 106227.
Open this publication in new window or tab >>Electrochemical and passivation behavior of a corrosion-resistant WC-Ni(W) cemented carbide in synthetic mine water
2023 (English)In: International journal of refractory metals & hard materials, ISSN 0263-4368, Vol. 114, article id 106227Article in journal (Refereed) Published
Abstract [en]

Two different grades, WC-20 vol.% Ni and WC-20 vol.% Co cemented carbides, respectively were systematically investigated concerning their microstructure, binder composition, and corrosion behavior. SEM-EBSD analysis verified that both grades have similar WC grain sizes (0.9–1.1 μm). AES analysis confirmed that the binder phase of the respective grade is an alloy of Ni-W and Co-W and that the concentration of W in the Ni- and Co-binder is 21 and 10 at. %, respectively. In synthetic mine water (SMW), the EIS behavior of WC-Ni(W) at the open circuit potential (OCP) conditions was studied for different exposure periods (up to 120 h). The EIS data fitting estimates low capacitance and high charge transfer resistance (Rct) values, which indicate that the passive film formed on WC-Ni(W) is thin and exhibits high corrosion resistance. At the OCP and potentiostatic-passive conditions, SEM investigations confirm the uncorroded microstructure of the WC-Ni(W). The AR-XPS studies confirmed the formation of an extremely thin (0.25 nm) WO3 passive film is responsible for the high corrosion resistance of WC-Ni(W), at OCP conditions. However, above the transpassive potential, the microstructure instability of WC-Ni(W) was observed, i.e., corroded morphology of both WC grains and Ni(W) binder. The electrochemical parameters, Rct, corrosion current density, and charge density values, confirmed that the WC-Ni(W) is a far better alternative than the WC-Co(W) for application in SMW.

Keywords
Cemented carbides, Binder phases, EIS, Corrosion, Passivation, AR-XPS, AES
National Category
Materials Engineering
Identifiers
urn:nbn:se:du-45915 (URN)10.1016/j.ijrmhm.2023.106227 (DOI)001032173200001 ()2-s2.0-85153334592 (Scopus ID)
Available from: 2023-04-26 Created: 2023-04-26 Last updated: 2023-08-15Bibliographically approved
Cinca, N. & Olsson, M. (2022). Assessment of initial transfer of metal work material on cemented carbide tools - Influence of cemented carbide composition, microstructure and surface topography. In: Proceedings of 20th Plansee Seminar 2022: . Paper presented at 20th Plansee Seminar May 30 - June 3, 2022, Reutte, Austria.
Open this publication in new window or tab >>Assessment of initial transfer of metal work material on cemented carbide tools - Influence of cemented carbide composition, microstructure and surface topography
2022 (English)In: Proceedings of 20th Plansee Seminar 2022, 2022Conference paper, Published paper (Refereed)
Abstract [en]

In many applications such as metal cutting and metal forming, cemented carbide tools work in sliding friction wear mode resulting in transfer of the metal work material to the tool surface. In these applications, a surface showing good anti-galling properties needs to be balanced with other desired tool material properties. In the present study, the metal transfer and friction characteristics of aluminum in sliding contact with cemented carbide were evaluated by performing tests under dry and lubricated conditions, where an Al tip is put into sliding contact with the polished surface of the cemented carbide under well-defined contact conditions. Cemented carbide grades include a straight WC-Co grade and two grades containing cubic carbides (i.e. TiC, TaC and NbC), to gain fundamental knowledge into the relation between microstructure and composition and anti-galling properties. Post-test characterization using high resolution FEG-SEM and EDS has been used to show the influence of carbide composition (chemical affinity effects) and topography on the tendency to initial material transfer.

Keywords
Cemented carbides, wear, galling, metal transfer, sliding friction
National Category
Materials Engineering
Identifiers
urn:nbn:se:du-39790 (URN)
Conference
20th Plansee Seminar May 30 - June 3, 2022, Reutte, Austria
Available from: 2022-03-08 Created: 2022-03-08 Last updated: 2023-04-14Bibliographically approved
Cinca, N., Gordon, S., Llanes, L. M. & Olsson, M. (2022). Friction, Material Transfer And Wear Phenomena In Sliding Contacts Between Cemented Carbide And Aluminum During Metal Forming. In: World PM 2022 Congress Proceedings: . Paper presented at World PM 2022 Congress Proceedings, World PM 2022 Congress and Exhibition, Lyon, 9 October 2022 through 13 October 2022. European Powder Metallurgy Association (EPMA)
Open this publication in new window or tab >>Friction, Material Transfer And Wear Phenomena In Sliding Contacts Between Cemented Carbide And Aluminum During Metal Forming
2022 (English)In: World PM 2022 Congress Proceedings, European Powder Metallurgy Association (EPMA) , 2022Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

In many metal forming processes, certain texturization of the tool is necessary to have some friction that can make the operation possible. One example of that is the use of crosshatching methods on cemented carbide punches to manufacture beverage cans. The deep drawing and ironing process of the aluminum foil during can production involves different wear mechanisms being active on the punch surface, i.e. adhesive and abrasive wear. The present work examines the abrasive wear performance and friction characteristics of two cemented carbide grades by means of scratch and linear reciprocating sliding wear testing with Al2O3 counterparts under dry and lubricated conditions, with smooth polished and textured cemented carbide surfaces respectively. Additionally, well-controlled tests in which an aluminum pin is sliding over the cemented carbide surface were performed to evaluate the initial metal transfer. Post-test characterization shows the influence of carbide microstructure on the friction, material transfer and wear mechanisms. © European Powder Metallurgy Association (EPMA)

Place, publisher, year, edition, pages
European Powder Metallurgy Association (EPMA), 2022
Keywords
Abrasion, Adhesives, Alumina, Aluminum oxide, Carbides, Friction, Powder metallurgy, Textures, Carbide surfaces, Cemented carbides, Material transfers, Material wear, Metal-forming process, Sliding contacts, Texturization, Transfer phenomenon, Wear mechanisms, Wear phenomena, Aluminum
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:du-46166 (URN)2-s2.0-85160764105 (Scopus ID)9781899072552 (ISBN)
Conference
World PM 2022 Congress Proceedings, World PM 2022 Congress and Exhibition, Lyon, 9 October 2022 through 13 October 2022
Available from: 2023-06-12 Created: 2023-06-12 Last updated: 2023-06-12Bibliographically approved
Olsson, M., Lundin, P., Samuelsson, J.-E., Tjerngren, P., Åhlberg, R., Börjesson, M. & Balazs, E. (2022). Färre ytfel på varmvalsade produkter.
Open this publication in new window or tab >>Färre ytfel på varmvalsade produkter
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2022 (Swedish)Report (Other academic)
Series
Jernkontorets forskning ; TO32-94
National Category
Materials Engineering
Identifiers
urn:nbn:se:du-44718 (URN)
Available from: 2022-12-28 Created: 2022-12-28 Last updated: 2023-03-17Bibliographically approved
Olsson, M., Lundin, P., Samuelsson, J.-E., Tjerngren, P., Åhlberg, R., Börjesson, M. & Balazs, E. (2022). YTFEL Deelrapport - Verksförsök.
Open this publication in new window or tab >>YTFEL Deelrapport - Verksförsök
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2022 (Swedish)Report (Other academic)
Series
Jernkontorets forskning ; TO32-91
National Category
Materials Engineering
Identifiers
urn:nbn:se:du-44721 (URN)
Available from: 2022-12-28 Created: 2022-12-28 Last updated: 2023-03-17Bibliographically approved
Olsson, M. & Åhlberg, R. (2022). YTFEL Delrapport - Ytfelsatlas.
Open this publication in new window or tab >>YTFEL Delrapport - Ytfelsatlas
2022 (Swedish)Report (Other academic)
Series
Jernkontorets forskning ; TO32-92
National Category
Materials Engineering
Identifiers
urn:nbn:se:du-44722 (URN)
Available from: 2022-12-28 Created: 2022-12-28 Last updated: 2023-03-17Bibliographically approved
Bejjani, R., Salame, C. & Olsson, M. (2021). An Experimental and Finite Element Approach for a Better Understanding of Ti-6Al-4V Behavior When Machining under Cryogenic Environment. Materials, 14(11), Article ID 2796.
Open this publication in new window or tab >>An Experimental and Finite Element Approach for a Better Understanding of Ti-6Al-4V Behavior When Machining under Cryogenic Environment
2021 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 14, no 11, article id 2796Article in journal (Refereed) Published
Abstract [en]

Due to increasing demand in manufacturing industries, process optimization has become a major area of focus for researchers. This research optimizes the cryogenic machining of aerospace titanium alloy Ti-6Al-4V for industrial applications by studying the effect of varying the nozzle position using two parameters: the nozzle's separation distance from the tool-chip interface and its inclination angle with respect to the tool rake face. A finite element model (FEM) and computational fluid dynamics (CFD) model are used to simulate the cryogenic impingement of cryogenic carbon dioxide on the tool-workpiece geometry. Experiments are conducted to evaluate cutting forces, tool wear, and surface roughness of the workpiece, and the results are related to the CFD and FEM analyses. The nozzle location is shown to have a significant impact on the cutting temperatures and forces, reducing them by up to 45% and 46%, respectively, while the dominant parameter affecting the results is shown to be the separation distance. Cryogenic machining is shown to decrease adhesion-diffusion wear as well as macroscopic brittle chipping of the cutting insert compared to dry turning, while the workpiece surface roughness is found to decrease by 44% in the case of cryogenic machining.

Keywords
CFD, FEM, cryogenic machining, cutting forces, titanium, tool wear
National Category
Manufacturing, Surface and Joining Technology
Identifiers
urn:nbn:se:du-37335 (URN)10.3390/ma14112796 (DOI)000660268600001 ()34073958 (PubMedID)2-s2.0-85107379879 (Scopus ID)
Available from: 2021-06-08 Created: 2021-06-08 Last updated: 2023-04-14Bibliographically approved
Olsson, M. (2021). Characterization of hot-rolled and annealed oxides on 2507 stainless steel – Microstructure, chemical composition, mechanical properties and pickling characteristics.
Open this publication in new window or tab >>Characterization of hot-rolled and annealed oxides on 2507 stainless steel – Microstructure, chemical composition, mechanical properties and pickling characteristics
2021 (English)Report (Other academic)
Abstract [en]

The surface characteristics of samples of the 2507 super duplex stainless steel with three different surface conditions, i.e. after hot rolling, annealing and blasting plus pickling, respectively, have been investigated. High resolution scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and scratch testing have been used to characterize the oxide scales with respect microstructure, chemical composition, and mechanical properties.

SEM and EDS-analysis of the oxide scales formed on hot rolled and hot rolled plus annealed samples, show an outer Fe-rich oxide layer and an inner Cr-rich oxide layer close to the interface. While the hot rolled oxide scale displays a relatively porous oxide composed of oxide particles, the hot rolled plus annealed oxide scale displays a more dense, “sintered”, microstructure, i.e. the high temperature during the annealing step promotes a densification of the oxide scale microstructure.

The outer porous Fe-rich layer shows poor cohesive strength and poor adhesion to the underlying Cr-rich layer. In contrast, the inner more dense Cr-rich layer shows strong adhesion towards the 2507 duplex stainless steel. The dense microstructure and strong adhesion of the inner Cr-rich layer is believed to significantly influence the blasting and pickling characteristics.

Publisher
p. 18
Series
Jernkontoret forskning
Keywords
Hot rolling, Stainless steel, Oxide layers, Microstructure, Mechanical properties
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:du-39059 (URN)
Funder
Vinnova
Available from: 2021-12-15 Created: 2021-12-15 Last updated: 2023-04-14Bibliographically approved
Olsson, M. (2021). Characterization of oxide layers formed on pilot plant Steckel rolled 304 stainless steel samples.
Open this publication in new window or tab >>Characterization of oxide layers formed on pilot plant Steckel rolled 304 stainless steel samples
2021 (English)Report (Other academic)
Abstract [en]

The evolution of oxide scales on 304 austentic stainless steel during Steckel mill rolling has been investigated by performing pilot trials at Swerim Luleå. The influence of Steckel furnace conditions, i.e. temperature, time and excess oxygen, at reheating between subsequent roll passes have been evaluated and the resulting surface structures have been characterized.

High resolution scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were used to characterize the oxide scales with respect microstructure and chemical composition. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was used to analyze the chemical composition at the stainless steel / oxide interface region.

In common for all Steckell rolled samples investigated was a pronounced rough surface morphology and the surface roughness was found to increase with more iterations of rolling. Also, the amount of oxides in the rolled surface tends to increase with longer heating times and more iterations of rolling. 

Surface areas, less distorted by the rolling contact, displayed an oxide scale with an outer rather well-defined oxide layer with relatively large grains and an inner, less well defined, oxide layer. EDS-analysis show that the outer oxide mainly consists of Fe2O3, whereas the inner oxide layer corresponds to a chromium rich (Cr,Fe)2O3 oxide combined with areas of partly oxidized stainless steel. ToF-SIMS analysis of the stainless steel / oxide interface region show the presence of B, Ca and Cu in connection to the oxides.

Publisher
p. 22
Series
Jernkontoret forskning ; TO31-49
Keywords
Rolling, Stainless steel, Oxide layer
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:du-39057 (URN)
Funder
Vinnova
Available from: 2021-12-15 Created: 2021-12-15 Last updated: 2023-04-14Bibliographically approved
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