| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Lenrick, Filip
Lund University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (37/37 displayed)
- 2024Spatially resolved structural and chemical properties of the white layer in machined Inconel 718 super alloycitations
- 2024Diffusion Bonding 321-Grade Stainless Steel : Failure and Multimodal Characterization
- 2024Diffusion Bonding 321-Grade Stainless Steel
- 2024Effect of ageing on machining performance of grey cast iron and its compensation by cutting speed managementcitations
- 2024Machinability improvement by in-operando Tool Protection Layers through designed steel alloying : The case of manganese steelcitations
- 2024On wear of TiAlN coated tools with and without NbN overlayer in machining titanium alloyscitations
- 2023Predicting wear mechanisms of ultra-hard tooling in machining Ti6Al4V by diffusion couples and simulationcitations
- 2023High-Temperature Oxidation of Titanium Aluminium Nitride Coatings Visualized by Environmental Transmission Electron Microscopy
- 2022Performance and wear mechanisms of different PcBN tools when machining superalloy AD730citations
- 2022Influence of sub-surface deformation induced by machining on stress corrosion cracking in lead-free brasscitations
- 2022Understanding wear and interaction between CVD α-Al2O3 coated tools, steel, and non-metallic inclusions in machiningcitations
- 2022Multicomponent binders for PcBN performance enhancement in cutting tool applicationscitations
- 2021Performance and wear mechanisms of uncoated cemented carbide cutting tools in Ti6Al4V machiningcitations
- 2021Onset of the degradation of CVD α-Al2O3 coating during turning of Ca-treated steelscitations
- 2021Characterisation of worn WC tool using STEM-EDS aided by principal component analysiscitations
- 2021Evaluation of tool wear mechanisms and tool performance in machining single-phase tungstencitations
- 2021Wear mechanisms of PcBN tools when machining AISI 316Lcitations
- 2021Surface chemistry and diffusion of trace and alloying elements during in vacuum thermal deoxidation of stainless steelcitations
- 2020Performance and wear mechanisms of PCD and pcBN cutting tools during machining titanium alloy Ti6Al4Vcitations
- 2020On twinning in ultrahard nanocrystalline cubic boron nitride
- 2020Study of wear mechanisms of cemented carbide tools during machining of single-phase niobiumcitations
- 2019GaN nanowires as probes for high resolution atomic force and scanning tunneling microscopycitations
- 2019Scanning 3DXRD measurement of grain growth, stress, and formation of Cu6Sn5 around a tin whisker during heat treatmentcitations
- 2018Self-assembled InN quantum dots on side facets of GaN nanowirescitations
- 2018Tool Wear Mechanisms of pcBN tooling during High-Speed Machining of Gray Cast Ironcitations
- 2017Wear mechanisms of uncoated and coated cemented carbide tools in machining lead-free silicon brasscitations
- 2017Performance and wear mechanisms of novel superhard diamond and boron nitride based tools in machining Al-SiCp metal matrix compositecitations
- 2016Focused Ion Beam Preparation and Transmission Electron Microscopy of Materials for Energy Applications
- 2015Phase Transformation in Radially Merged Wurtzite GaAs Nanowires.citations
- 2015Growth parameter design for homogeneous material composition in ternary GaxIn1-xP nanowires.citations
- 2014Chemical solution deposition of thin films for protonic ceramic fuel cellscitations
- 2013Synthesis by spark plasma sintering of a novel protonic/electronic conductor composite: BaCe0.2Zr0.7Y0.1O3-delta /Sr0.95Ti0.9Nb0.1O3-delta (BCZY27/STN95)citations
- 2013Synthesis by spark plasma sintering of a novel protonic/electronic conductor composite: BaCe 0.2 Zr 0.7 Y 0.1 O 3−δ /Sr 0.95 Ti 0.9 Nb 0.1 O 3−δ (BCZY27/STN95)citations
- 2012Electron microscopy study of single crystal BaZr0.9Y0.1O3-x films prepared by chemical solution depositioncitations
- 2012High-Frequency Performance of Self-Aligned Gate-Last Surface Channel In0.53Ga0.47As MOSFETcitations
- 2011High Transconductance Self-Aligned Gate-Last Surface Channel In0.53Ga0.47As MOSFET
- 2011Characterization of White Layer Generated when Turning Aged Inconel 718citations
Places of action
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article
Onset of the degradation of CVD α-Al2O3 coating during turning of Ca-treated steels
Abstract
The ability to control the shape, distribution and composition of non-metallic inclusions has had an important impact on many aspects of steel making. One such impact is on the machinability. Ca-treatments have shown to be able to reduce the abrasiveness of oxide inclusions, improve chip-breaking and lead to formation of deposits that reduce tool wear. However, machining Ca-treated steels with Al2O3 coated cemented carbide tools has not been as advantageous as expected. This study investigates the mechanisms behind the anomalous wear of Al2O3 coatings when turning soft Ca-treated steels. Longitudinal turning tests at a range of speeds (vc = 100–600 m/min) show rapid localized degradation of the Al2O3 coating limited to the sliding zone. Detailed analysis of the degradation mechanisms was performed using scanning and transmission electron microscopy. The results demonstrate a presence of chemical interactions between the alumina coating and non-metallic inclusions. The interaction resulted in the formation of mainly calcium aluminates and partly alumina-magnesia spinel. In-operando infrared thermography measurements indicate cutting temperatures of 850–1000 °C. Thermodynamic calculations give that CaO and MgO readily reacts with Al2O3, while the reaction with CaS requires presence of additional oxygen at these cutting conditions. Additional turning experiments investigate the influence of oxygen by controlling the cutting environment by adding oxygen (compressed air) or removing oxygen (supply argon). These additional tests show that the presence of additional oxygen has a limited impact on the possible Ca–Al2O3 interaction. This demonstrat a potential for further machinability improvements by controlling the chemical interaction between Ca and Mg based non-metallic inclusions and alumina coatings.