Sökning: "Stefan Roos"

Hittade 3 avhandlingar innehållade orden Stefan Roos.

  1. 1. Electron beam powder bed fusion processing of stainless steels

    Författare :Stefan Roos; Lars-Erik Rännar; Andrei Koptioug; Carlos Alberto Botero Vega; Iain Todd; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Additive manufacturing; Electron beam powder bed fusion; PBF-EB; Stainless steel; Mechanical properties; Micro-structure; Nanoindentation;

    Sammanfattning : Additive manufacturing (AM) is still a relatively new technology. In contrast to traditional machining where material is removed from a blank, AM is used to fuse a feedstock material into complex shapes, layer by layer, starting from an empty workspace. LÄS MER

  3. 2. Process Development for Electron Beam Melting of 316LN Stainless Steel

    Författare :Stefan Roos; Lars-Erik Rännar; Andrei Koptioug; Jonas Danvind; Lars Pejryd; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; additive manufacturing; beam deflection rate; electron beam melting; energy input; material properties; microstructure; powder bed fusion; process parameters; 316LN stainless steel;

    Sammanfattning : Additive manufacturing (AM) is a technology that inverts the procedure of traditional machining. Instead of starting with a billet of material and removing unwanted parts, the AM manufacturing process starts with an empty workspace and proceeds to fill this workspace with material where it is desired, often in a layer-by-layer fashion. LÄS MER

  4. 3. "God Wants It!" : The Ideology of Martyrdom of the Hebrew Crusade Chronicles and Its Jewish and Christian Background

    Författare :Lena Roos; Anders Hultgård; Katrin Almbladh; Stefan Schreiner; Uppsala universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; History of religions; Martyrdom; First Crusade; Judaism; religious change; inter-religious relations; persecutions of Jews; suicide; infanticide; forced conversion; Religionshistoria; History of religion; Religionshistoria; History Of Religions; religionshistoria;

    Sammanfattning : This dissertation deals with the ideology of martyrdom of the Hebrew Chronicles which were written in response to the persecutions of the Rhineland Jews during the First Crusade in 1096. The Chronicles describe how thousands of Jews died, some of whom were killed by the crusaders, others killed each other or committed suicide rather than being forcibly bap­tized or killed by the crusaders. LÄS MER