Sökning: "lump formation"

Hittade 5 uppsatser innehållade orden lump formation.

  1. 1. Concrete in vertical slipforms : A process for determining a suitable concrete composition

    Master-uppsats, KTH/Betongbyggnad

    Författare :Ellen Gegerfelt; Alva Hasselqvist; [2021]
    Nyckelord :Slipforming; fresh concrete; workability; consistency; alternative binders; slipform rate; lifting cracks; delamination; lump formation; Glidformsgjutning; färsk betong; arbetbarhet; konsistens; alternativa bindemedel; glidformshastighet; lyftsprickor; delaminering; klumpbildning;

    Sammanfattning : In the construction industry of today, many projects are getting bigger, higher and more complicated than ever before. The most important material in these projects is concrete and the process of casting has developed a lot during the last century. LÄS MER

  3. 2. High Temperature Tribology in Hot Stamping

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Evan Kurnia; [2019]
    Nyckelord :high temperature tribology; hot stamping; acoustic emission; condition monitoring; hardfacing;

    Sammanfattning : Many automotive components are made of Al-Si coated ultra-high strength boron steel (UHSS) and are produced by hot stamping process. In this process, the workpiece is heated to an austenitizing temperature and is then formed and quenched simultaneously between the tools to achieve the desired shape and high strength. LÄS MER

  4. 3. Genomgång och analys av alternativ utrustning till utmatningsskruvar i stål

    Kandidat-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Markus Isaksson; [2017]
    Nyckelord :;

    Sammanfattning : Denna rapport återger det arbete som syftat till att gå igenom och analysera alternativ utrustning till utmatningsskruvar i stål med det primära målet att eliminera risken för metallspånskontaminering. Projektet har utförts som ett examensarbete för högskoleingenjörsprogrammet i maskinteknik vid fakulteten för hälsa, natur- och teknikvetenskap på Karlstads universitet. LÄS MER

  5. 4. Influence of tool steel carbide orientation on sliding wear

    Master-uppsats, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Johanna Meseret Berhe Larsson; [2013]
    Nyckelord :;

    Sammanfattning : For SMF industry, galling of tool in SMF operation during forming of stainless steel is a major concern, this increase the interest to study influence of tool microstructure on galling. In the present work, ingot cast AISI D2 were evaluated concerning wear mechanisms and critical sliding distance against austenitic stainless steel sheet in lubricated sliding condition at different contact pressures using a slider-on-flat-surface (SOFS) tribometer for carbide phases oriented in three different directions. LÄS MER

  7. 5. Studies of root formation of micropropagated shoots in vitro and cuttings from light treated mother plants ex vitro

    L3-uppsats, SLU/Dept. of Crop Science

    Författare :Yvonne Hedman; [2005]
    Nyckelord :Aristolochia manshuriensis; micropropagating; rooting; etiolation; callus formation; auxins; activated charcoal; riboflavin; dipping solution;

    Sammanfattning : The ornamental plant Aristolochia manshuriensis is difficult to propagate by cuttings and therefore a propagation method in vitro has been developed. However the published method has several limitations due to unpredictable and low rooting percentage as well as low survival rate. LÄS MER