Sökning: "dynamic strain aging"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden dynamic strain aging.

  1. 1. Modelling Aspects in Forming and Welding of Nickel-Base Superalloys

    Författare :Lluís Pérez Caro; Mats Oldenburg; Eva-Lis Odenberger; Juan Carlos Cante Teran; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; alloy 718; Haynes 282; cold forming; hot forming; material characterization; GISSMO; welding; heat treatment; manufacturing chain; springback; shape distortions; dynamic strain aging; DSA; microstructure; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : The reduction of fuel consumption and carbon dioxide emissions are currently a key factor for the aviation industry because of major concerns about climate change and more restrictive environmental laws. One way to reduce both fuel consumption and CO2 emissions is by significantly decreasing the weight of vehicles while increasing the efficiency of the engine. LÄS MER

  3. 2. Modelling of high strain rate plasticity and metal cutting

    Författare :Dan Wedberg; Jesper Hattel; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik;

    Sammanfattning : Metal cutting is one of the most frequently used forming processes in the manufacturing industry. Extensive effort is made to improve its process and simulation has become an integrated part, not only in the product development process but also in the customer relations. LÄS MER

  4. 3. Atrial function and loading conditions in athletes

    Författare :Flavio D'Ascenzi; Michael Henein; Sergio Mondillo; Roxy Senior; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; athlete s heart; training; exercise; speckle-tracking echocardiography; atrial strain; atrial deformation; Cardiology; kardiologi;

    Sammanfattning : Intensive training is associated with hemodynamic changes that typically induce an enlargement of cardiac chamber. Despite LA dilatation in athletes has been interpreted as a benign adaptation, little evidence is available. LÄS MER

  5. 4. Improved finite element modelingfor chip morphology prediction inmachining of C45E steel

    Författare :Ashwin Moris Devotta; Tomas Beno; Mahdi Eynian; Ronnie Löf; Erik Tyldhed; Leonardo De Chiffre; Högskolan Väst; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chip curl; Chip flow; Chip segmentation; Computed Tomography; Damage modeling; Flow stress modeling; Machining; Spånkrökning; Spånflöde; Spånsegmentering; Datortomografi; Skademodelleringen; Modellering av Flytspänning; Bearbetning; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Sammanfattning : Within the manufacturing of metallic components, machining plays an important role and is of vital significance to ensure process reliability. From a cutting tool design perspective, physics-based numerical modeling that can predict chip morphology is highly necessary to design tool macro geometry. LÄS MER

  7. 5. Defects in Austenitic Steels and Hard Metals - A DFT-based Study

    Författare :Ruiwen Xie; Levente Vitos; Ilja Turek; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; defects; austenitic steels; cemented carbides; ab-initio; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : Materials are never 100% pure due to the limitation of purification method or manufacturing process. Nor are they perfect, especially under deformation. The present work aims to explore different roles played by the defects in austenitic steels and hard metals. LÄS MER