Search for dissertations about: "neutrondiffraktion"

Found 5 swedish dissertations containing the word neutrondiffraktion.

  2. 1. Pressure-Induced Amorphization and Distinct Amorphous States of Clathrate Hydrates

    Author : Paulo H. B. Brant Carvalho; Ulrich Häussermann; Ove Andersson; John Stephen Loveday; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Clathrate Hydrates; Pressure-Induced Amorphization; Amorphous States; Glassy States; Ice; Neutron Diffraction; Klatrathydrater; Tryckinducerad Amorfisering; Amorfa tillstånd; Glasartade tillstånd; Is; Neutrondiffraktion; Physical Chemistry; fysikalisk kemi;

    Abstract : This thesis summarizes a study on the pressure-induced amorphization (PIA) and structures of amorphous states of clathrate hydrates (CHs).PIA involves the transition of a crystalline material into an amorphous solid in response of mechanical compression at temperatures well below the melting point. READ MORE

  4. 2. Microstructure and mechanical properties of low-temperature hot isostatic pressed Ti-6Al-4V manufactured by electron beam melting

    Author : Karthikeyan Thalavai Pandian; Robert Pederson; Thomas Hansson; Magnus Neikter; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Additive manufacturing; high-temperature tensile properties; low cycle fatigue; neutron diffraction; fatigue crack growth; Additiv tillverkning; dragprovning vid hög temperatur; låg cykelutmattning; neutrondiffraktion; tillväxt av utmattningssprickor; Production Technology; Produktionsteknik;

    Abstract : Ti-6Al-4V manufactured by electron beam melting Keywords: Additive manufacturing, high-temperature tensile properties, low cycle fatigue, neutron diffraction, fatigue crack growth ISBN: 978-91-89325-27-2 (Printed) 978-91-89325-26-5 (Electronic) Ti-6Al-4V is the most widely used α+β titanium alloy in aerospace engine applications due to its high specific strength. Typically, the alloy is manufactured as castings or forgings and then machined to final geometry. READ MORE

  5. 3. Simulation of robot paths and heat effects in welding

    Author : Mikael Ericsson; Institutionen för elektro- och informationsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Produktionsteknik; Welding; Automation; robotics; Off-line programming; Robotics; Automatiska system; Production technology; control engineering; Finite Element Analysis; reglerteknik; robotteknik;

    Abstract : The objective of this thesis is to develop a simulation tool and a method by which robot trajectories, temperature histories, residual stresses and distortion can be analysed and optimized off-line. This was performed by integrating robot simulation software with finite element analysis software. READ MORE

  6. 4. Neutron scattering studies of hard metals

    Author : Ahmet Bahadir Yildiz; Peter Hedström; Annika Borgenstam; Joakim Odqvist; Daniele Mari; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hard metals; cemented carbides; small angle neutron scattering; neutron diffraction; in-situ characterization; grain coarsening; phase separation; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : Since their discovery about 100 years ago, tools made of hard metals have been the enablers of development in various areas: from drilling subway lines for more sustainable cities to the machining of complex next-generation airplane engine parts for reduced CO2 emissions. An increase in properties of hard metals thus leads to efficient operations with shorter lead-time, less environmental footprint, and reduced cost. READ MORE

  7. 5. Anisotropic mechanical behaviors and microstructural evolution of thin-walled additively manufactured metals

    Author : Cheng-Han Yu; Johan Moverare; Ru Lin Peng; Joe Kelleher; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hot tensile testing; slow strain rate tensile testing; creep; anisotropy; crystallographic texture evolution; deformation twinning; Varmdragprov; Dragprov med låg töjningshastighet; kryp; anisotropi; kristallografisk textur; deformationstvillingar;

    Abstract : Additive manufacturing (AM), also known as 3D printing, is a concept and method of a manufacturing process that builds a three-dimensional object layer-by-layer. Opposite to the conventional subtractive manufacturing, it conquers various limitations on component design freedom and raises interest in various fields, including aerospace, automotive and medical applications. READ MORE