Sökning: "polycrystal"

Visar resultat 6 - 8 av 8 avhandlingar innehållade ordet polycrystal.

1. 6. Zirconia as a biomaterial for odontological applications : effects of composition and manufacturing processes on fracture resistance

   Författare :Anders Sundh; Göran Sjögren; Krister Nilner; Umeå universitet; []
   Nyckelord :CAD CAM; ceramics; HIPing; Mg-PSZ; veneering; Y-TZP; zirconia;

   Sammanfattning : Background: Ceramics have long been amongst the most biocompatible materials known but their mechanical properties have limited their use. During the past few decades zirconia has aroused particular interest as a biomaterial because of its greater flexural strength, fracture resistance and toughness compared to other bioceramics. LÄS MER

3. 7. Multiscale modeling of dynamic recrystallization

   Författare :Ylva Mellbin; Hållfasthetslära; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dynamic recrystallization; Crystal plasticity; Texture; Grain size strengthening; Vertex model; Nucleation; Particle pinning; Large deformations; Multiscale modeling; GPGPU;

   Sammanfattning : During thermomechanical processing of metals, changes occur in the microstructure of the material which affect its macroscopic properties. By understanding these transformations in the microstructure, it becomes possible to design the processes in a way which yields the desired properties in the finished product. LÄS MER

4. 8. Ab initio atomistic simulation of metals and multicomponent alloys

   Författare :Fuyang Tian; Levente Vitos; Kalevi Kokko; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; high entropy alloys; ab inito;

   Sammanfattning : Ab initio theory provides a powerful tool to understand and predict the behavior of materials. This thesis contains both of these aspects. First we use ab initio alloy theory to investigate a new kind of complex alloy (high-entropy alloy). LÄS MER