SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "swepub ;lar1:(du);pers:(Olsson Mikael);conttype:(refereed)"

Sökning: swepub > Högskolan Dalarna > Olsson Mikael > Refereegranskat

  • Resultat 11-20 av 105
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
11.
  • Fallqvist, Mikael, et al. (författare)
  • Nucleation and growth of CVD alpha-Al2O3 on TixOy template
  • 2012
  • Ingår i: Surface & Coatings Technology. - : Elsevier BV. - 0257-8972 .- 1879-3347. ; 207, s. 254-261
  • Tidskriftsartikel (refereegranskat)abstract
    • The microstructure, phase and chemical composition of TixOy, templates used to nucleate alpha-Al2O3 on Ti(C,N) coated cemented carbide have been elucidated using scanning electron microscopy, X-ray diffraction, Auger electron spectroscopy and Time-of-Flight Secondary Ion Mass Spectrometry. Further, the adhesive strength of the alpha-Al2O3-TixOy-Ti(C,N) interfaces was investigated using scratch adhesion testing. The present study confirmed that the as-deposited template consisted of a Ti4O7 phase which during subsequent deposition of the Al2O3 layer transformed to a Ti3O5 phase and that the grown Al2O3 layer consisted of 100% alpha-Al2O3. Furthermore, the results showed that the lowest interfacial strength within the multilayer structure was exhibited by the Ti(C,N)-TixOy interface and that the transformation of Ti4O7 to Ti3O5 in the template resulted in formation of pores in the Ti(C,N)-template interface lowering the interfacial strength even more. The use of surface analysis techniques such as Auger electron spectroscopy and especially Time-of-Flight Secondary Ion Mass Spectrometry enabled trace element analyses using depth profiling to characterise the thin interfacial layers in detail. (c) 2012 Elsevier B.V. All rights reserved.
  •  
12.
  • Fallqvist, Mikael, 1982-, et al. (författare)
  • The influence of surface defects on the mechanical and tribological properties of VN-based arc-evaporated coatings
  • 2013
  • Ingår i: Wear. - : Elsevier BV. - 0043-1648 .- 1873-2577. ; 297:1-2, s. 1111-1119
  • Tidskriftsartikel (refereegranskat)abstract
    • The influence of surface defects, i.e. droplets and craters, on the mechanical and tribological properties of arc-evaporated VxN coatings deposited on cemented carbide has been investigated in a scratching contact using a diamond stylus and a sliding contact using a stainless steel pin. Post-test characterisation using 3D optical surface profilometry and scanning electron microscopy was performed in order to investigate the mechanical and tribological response of the coatings. The results show that scratch induced coating cracking mainly is restricted to larger droplets showing a low interfacial bonding to the adjacent coating matrix. The influence of coating defects on the cohesive strength, i.e. the tendency to chipping of small coating fragments, was found to be relatively small. In contrast, the presence of defects may have a significant impact on the interfacial adhesive strength, increasing the tendency to spalling. In sliding contact, surface defects such as droplets and craters have a strong impact on the tribological behaviour of the coatings causing abrasive wear of the less hard counter material surface and material transfer to the coating, both mechanisms affecting the friction characteristics of sliding contact tribo system.
  •  
13.
  • Heinrichs, Jannica, et al. (författare)
  • Influence of binder metal on wear initiation of cemented carbides in sliding contact with granite
  • 2021
  • Ingår i: Wear. - : Elsevier. - 0043-1648 .- 1873-2577. ; 470-471
  • Tidskriftsartikel (refereegranskat)abstract
    • Drill bits equipped with WC-Co cemented carbide buttons offer great performance in many rock drilling applications. Generally, the wear of these buttons against the rock is gradual and moderate, or even slow depending on the rock conditions. However, the Co binder has recently been found to cause health issues and an alternative binder, which does not compromise the performance of the cemented carbide, is needed. In the present work, the performance of WC-Fe and WC-Ni is investigated and compared to the common WC-Co in a sliding test against granite.The results show immediate scrape-off of granite against protruding WC grain edges. Some WC grains crack and fragments are subsequently removed, adding up to loss of entire WC grains. A nanoscale pattern gradually evolves on other WC grains, implying also nanoscale wear. Both WC-Fe and WC-Ni show significantly faster wear initiation and early propagation compared to WC-Co, although the wear characteristics are similar.
  •  
14.
  •  
15.
  •  
16.
  • Heinrichs, Jannica, 1982-, et al. (författare)
  • Initial deformation and wear of cemented carbides in rock drilling as examined by a sliding wear test
  • 2017
  • Ingår i: International journal of refractory metals & hard materials. - : Elsevier BV. - 0263-4368. ; 64, s. 7-13
  • Tidskriftsartikel (refereegranskat)abstract
    • Due to a combination of high hardness and toughness, resulting in excellent wear resistance, cemented carbides are commonly used as the rock crushing component in rock drilling. The present paper presents a unique study where the very initial stages of deformation and wear of cemented carbide in sliding contact with rock are followed in small incremental steps. After each step, a pre-determined area within the wear mark is characterized using high resolution SEM and EDS. This facilitates analysis of the gradual deformation, material transfer, degradation and wear. The deterioration mechanisms found in this sliding test are similar to those observed in actual rock drilling. Cemented carbide grades with different microstructures show significant differences, where a higher amount of Co and a larger WC grain size both are associated to more wear. 
  •  
17.
  • Heinrichs, Jannica, 1982-, et al. (författare)
  • Initial surface failure and wear of cemented carbides in sliding contact with different rock types
  • 2018
  • Ingår i: Wear. - : Elsevier BV. - 0043-1648 .- 1873-2577. ; 408-409, s. 43-55
  • Tidskriftsartikel (refereegranskat)abstract
    • The initial wear, deformation and degradation of cemented carbide in contact with different rock types are studied using a crossed cylinder sliding test. The sliding distance is limited to centimetres at a time, interrupted by successive SEM analysis. This allows for careful studies of the gradually changing microstructure of the cemented carbide during the test. Five different rock types are included; granite, metal sulphide ore, mica schist, quartzite and marble. All rock types are very different in microstructure, composition and properties. The cemented carbide grade used for the evaluation contains 6 wt% Co and fine (~ 1 µm) WC grains, a grade commonly used in rock drilling. The results show that the cemented carbide microstructure becomes altered already during the very first contact with rock. The initial wear rate and wear character is highly influenced by the rock type. The initial wear of the cemented carbide is highest against quartzite and lowest against marble.
  •  
18.
  •  
19.
  • Heinrichs, Jannica, et al. (författare)
  • Initiation of Galling in Metal Forming : Differences Between Aluminium and Austenitic Stainless Steel Studied In Situ in the SEM
  • 2013
  • Ingår i: Tribology letters. - : Springer Science and Business Media LLC. - 1023-8883 .- 1573-2711. ; 50:3, s. 431-438
  • Tidskriftsartikel (refereegranskat)abstract
    • High friction and transfer of work material to tool surfaces constitute important industrial problems in forming of many metals and alloys. However, it is very hard to gain a deeper understanding of these phenomena by studying real forming operations. In this paper, we have tried to gain fundamental understanding by avoiding as much as possible of the complexity of real forming. This has been realised by studying the friction and material transfer between well-defined tool material surfaces; uncoated and DLC-coated tool steel, and a needle shaped austenitic stainless steel tip, in situ in the SEM. The tool materials were tested in two conditions; well polished and well polished with local intentional scratches. It was found that work material was immediately transferred to the tool steel surface. When passing an intentional scratch, the local transfer was on a much larger scale, and the friction was higher, but the effect was mostly local. For the polished DLC-coated surface, almost no work material was transferred and the friction was low. An intentional scratch in the polished DLC surface barely influenced the galling behaviour. The present results are discussed in the light of previously published results from an analogous study with aluminium as work material.
  •  
20.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 11-20 av 105
Typ av publikation
tidskriftsartikel (76)
konferensbidrag (29)
Typ av innehåll
Författare/redaktör
Jacobson, Staffan (14)
Carlsson, Per (9)
Nilsson, Maria (4)
Surreddi, Kumar Babu ... (3)
Johansson, M (2)
Ståhl, J. E. (2)
visa fler...
Johansson, Lars-Gunn ... (2)
Jacobson, Staffan, 1 ... (2)
Karlsson, Patrik, 19 ... (2)
Svensson, Jan-Erik, ... (2)
Nyborg, Lars, 1958 (2)
Pejryd, Lars, 1955- (2)
Norgren, Susanne (2)
Canovic, Sead, 1979 (2)
M'Saoubi, R. (1)
Gordon, S (1)
Jacobson, S (1)
Bengtsson, M (1)
Wiklund, Urban (1)
Samuelsson, J (1)
Andersson, J (1)
Thierry, Dominique (1)
Lindgren, Lars-Erik (1)
Liu, Fang (1)
Karlsson, E (1)
Karlsson, Erik (1)
Joshi, Shrikant V., ... (1)
Björklund, Stefan, 1 ... (1)
Johansson, Mats (1)
M’Saoubi, Rachid (1)
Lundberg, M (1)
Götlind, Helena, 197 ... (1)
Berglund, T (1)
Hogmark, Sture (1)
Gelius, Ulrik (1)
Almqvist, Bjarne (1)
Pejryd, Lars (1)
Surreddi, Kumar Babu (1)
Andersson, J. M. (1)
Hatami, Sepehr, 1981 (1)
Liu, Fang, 1975 (1)
Hellström, Kristina (1)
Johansson, Mats K. G ... (1)
Berger, R (1)
Nilsson, Malin (1)
Gunnarsson, S. (1)
Halvarsson, Mats, 19 ... (1)
Oikonomou, Christos (1)
Mahade, Satyapal, 19 ... (1)
Bengtsson, Maria (1)
visa färre...
Lärosäte
Uppsala universitet (34)
Chalmers tekniska högskola (4)
Örebro universitet (3)
Kungliga Tekniska Högskolan (2)
Linköpings universitet (2)
visa fler...
Luleå tekniska universitet (1)
Stockholms universitet (1)
Högskolan Väst (1)
RISE (1)
visa färre...
Språk
Engelska (104)
Odefinierat språk (1)
Forskningsämne (UKÄ/SCB)
Teknik (86)
Naturvetenskap (3)

År

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy