Sökning: "grain boundaries"

Visar resultat 1 - 5 av 64 uppsatser innehållade orden grain boundaries.

1. 1. Impact of Residual Stress on the Warm Pre-Stressing Effect

   Master-uppsats, KTH/Hållfasthetslära

   Författare :Emil Danielsson; [2023]
   Nyckelord :Warm Pre-Stressing effect; Residual stress; Cleavage fracture; Ferritic Steel; Fracture mechanics; Varm förspänning; Restspänningar; Klyvbrott; Brottmekanik; Ferritiskt stål;

   Sammanfattning : Irradiation of a reactor pressure vessel (RPV) causes a shift of the ductile to brittle transition region towards higher temperature regions. In the event of a pressurized thermal shock (PTS), where the temperature drops drastically, the ductile to brittle transition region might be entered for irradiated ferritic steel. LÄS MER

3. 2. Effect of Heat Treatment on the Microstructure and Hardness Property of Additively Manufactured Ti6Al-4V and Ti-6Al-4V-4.5wt.%316L Componentsfor Biomedical Applications.

   Master-uppsats, Uppsala universitet/Institutionen för materialvetenskap

   Författare :Moyosore Babatomide Fakoya; [2023]
   Nyckelord :;

   Sammanfattning : AbstractThe continuous advancement of medical implants technology presents exciting possibilities.Laser Powder Bed Fusion (L-PBF) additive manufactured Ti-6Al-4V alloy implants showtremendous promise as they offer the potential for highly personalized implants, improved implantfunctionality and enhanced long-term outcomes. LÄS MER

4. 3. Investigation of high temperature stability of additive manufactured austenitic stainless steels for space applications

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Materialvetenskap

   Författare :Belén Alonso Rancurel; [2023]
   Nyckelord :austenitic stainless steel; additive manufacturing; high temperature corrosion; high temperature stability;

   Sammanfattning : Additive manufacturing (AM) techniques are being studied for their application in the aerospace industry. Numerous benefits come from the already in shape final piece, which needs reduced amount of prime material for its production and can have its shape numerically optimized for weight reduction. LÄS MER

5. 4. Comparative investigation of micromechanisms of plastic deformation by in-situ tensile tests of highly textured 316L steel

   Master-uppsats, Uppsala universitet/Institutionen för materialvetenskap

   Författare :Subhani Kumarasinghe; [2022]
   Nyckelord :Additive manufacturing; texture control; plastic deformation;

   Sammanfattning : Additive manufacturing (AM) is identified as one of the best techniques in manufacturing components addressing most of the current challenges including material scarcity, design complexity, material compatibility, etc. Stainless steel 316L is one of the promising material candidates in AM due to its extraordinary properties that are useful in a wide variety of industries. LÄS MER

7. 5. Precipitation behavior of the super austenitic stainless steel SANICRO® 35 and the effect on impact toughness and pitting corrosion resistance

   Master-uppsats, KTH/Materialvetenskap

   Författare :Shunyi Li; [2022]
   Nyckelord :Super austenitic stainless steel; solid phase transformation; TTT diagram; impact toughness; critical pitting temperature; TC PRISMA simulation; Superaustenitiskt rostfritt stål; fastfasomvandling; TTT-diagram; slaghållfasthet; kritisk punktfrätningstemperatur; TC PRISMA simulering;

   Sammanfattning : This research extended the knowledge of the solid phase transformation and the resulting influence on impact toughness and pitting corrosion resistance in super austenitic stainless steel (SASS) SANICRO® 35. A time-temperature-transformation diagram (TTT diagram) was assembled by performing isothermal heat treatments in the temperature range of 650-1050 °C for different periods of time, ranging from 5 min to 500 min. LÄS MER