Sökning: "Machined Surfaces"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden Machined Surfaces.

  1. 1. Electron beam melting: Impact of part surface properties on metal fatigue and bone ingrowth

    Författare :Rebecca Klingvall Ek; Lars-Erik Rännar; Mikael Bäckström; Jaan Hong; Ola Harrysson; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Additive Manufacturing AM ; Electron Beam Melting EBM ; As-built surfaces; Bone Ingrowth; Metall Fatigue; Machined Surfaces; Hirtisation; Hot Isostatic Pressing HIP ;

    Sammanfattning : AbstractThe aim of this thesis is to investigate aspects on how additive manufacturing (AM) contributes to functional bone implants with the use of the electron beam melting (EBM) technology. AM manufactures parts according to computer-aided design, and the EBM technology melts powder using an electron beam, which acts similar to a laser beam. LÄS MER

  3. 2. Adhesion to machined and laser ablated wood surfaces

    Författare :Micael Stehr; KTH; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; ablation; adhesion; checks; coating; cracks; excimer laser; gluing; IR laser; mechanical machining; mechanical weak boundary layer; microscopy; notched specimens; pine; planing; sample preparation; sawing; scanning electronmicroscopy; spruce; tip-cracks; UV laser; weak boundary layer; wood;

    Sammanfattning : This thesis is a contribution to the R&D-program ValueActivation at KTH,Division of Wood Technology and Processingand containsfive papers related to the evaluation and development ofmachining techniques (mechanical and irradiation treatments)whereby weak boundaries at the wood surfaces in the form of(mechanical) weak boundary layers and (micro) cracks due tomechanical treatment can be avoided.The first paper describes the development of a method–using a UV laser–to study the mechanically weakenedboundaries. LÄS MER

  4. 3. Methods for Characterisation of Pressing Die Surfaces

    Författare :Johan C Berglund; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; finish milling; scale-sensitive fractal analysis; surface characterisation; polishing; functional correlation; : pressing dies; functional filtration; surface roughness; functional surface;

    Sammanfattning : Design and manufacture of dies and moulds is a critical aspect of many production systems since the manufacturing and try-out of new dies and moulds often is essential in determining the lead-time and quality of a new production system. In the automotive industry, many new car models are introduced each year and for each of these models, a new set of pressing dies has to be designed and manufactured. LÄS MER

  5. 4. Cellular responses to titanium surfaces blasted with TiO2 particles

    Författare :Kamal Mustafa; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : A major determinant of successful osseointegration of endosseous implants is the surface topography of the implant, which influences the cellular response of the surrounding tissues. This series of experimental studies investigated cellular responses to surface modifications of titanium implant material. LÄS MER

  7. 5. The effect of tobacco exposure on bone healing and the osseointegrationof dental implants

    Författare :Shariel Sayardoust; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; crevicular fluid; dental implants; gene expression; human; implant surfaces; implant survival; marginal bone loss; osseointegration; pain; periodontitis; resonance frequently analysis; smoking; titanium;

    Sammanfattning : Background: The mechanisms behind the impact of smoking on osseointegration are not fully understood. Aim: To correlate the clinical and molecular aspects of osseointegration in smokers compared with non-smokers. LÄS MER