Sökning: "precipitation on grain boundaries"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden precipitation on grain boundaries.

1. 1. 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

3. 2. Aluminium Nitride-containing Steels for High-Temperature Low-Pressure Carburizing Processes

   Master-uppsats, KTH/Materialvetenskap

   Författare :Elias Nybacka Reiland; [2022]
   Nyckelord :;

   Sammanfattning : By increasing the temperature at which low-pressure carburizing is performed, the process time for production of case-hardened steels decrease but run a risk of abnormal grain growth occurring during carburizing. Particles present in the steel pin the grain boundaries and can prevent this growth depending on their size and volume fraction. LÄS MER

4. 3. Thermal Stability of Titanium and Niobium Stabilized Stainless Steel

   Master-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

   Författare :Oskar Darselius Berg; [2020]
   Nyckelord :Technology and Engineering;

   Sammanfattning : This master thesis examined the microstructure after heat treatments in stainless steel, two conventional stainless steel (304 and 316) and two novel high temperature stainless steel. These stainless steels are for the use in high temperature heat exchangers for extended temperature range. LÄS MER

5. 4. Varmduktilitet vid stränggjutning av duplexa rostfria stål

   Master-uppsats, KTH/Materialvetenskap

   Författare :Sandeep Singh; [2017]
   Nyckelord :;

   Sammanfattning : Abstract Hot ductility during continuous casting of duplex stainless steels In the continuous casting of the duplex stainless steel, longitudinal corner cracks in the first casted bloom of SAF 2507 have been discovered by Sandvik. SAF 2205 contains the same alloying substances as SAF 2507, but with some difference in the concentration of the elements. LÄS MER

7. 5. Degradation mechanisms of UN and UN–10U3Si2 pellets of varying microstructure by comparative steam oxidation experiments

   Master-uppsats, KTH/Reaktorfysik

   Författare :Selim Uygur; [2016]
   Nyckelord :Uranium Mononitride; Uranium Silicide; Composite; Steam degradation; corrosion mechanism;

   Sammanfattning : During an extended LOCA in a LWR, the current UO2 fuel reaches very high temperatures and eventually melts, while the current Zircaloy fuel cladding oxidizes releasing hydrogen. These two consequences can lead to an unacceptable amount of radioactive release by presenting accident routes for containment failure. LÄS MER