Sökning: "Grain coarsening"
Visar resultat 1 - 5 av 9 uppsatser innehållade orden Grain coarsening.
1. Reconstructing Mid-Late Holocene Arctic Climate Using Loess Deposits From Kangerlussuaq, Greenland
Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaperSammanfattning : The current geological epoch, the Holocene, began 11,700 years ago. During this time, a thermal maximum in temperature was reached somewhere during the early-middle stage at 8-5 kyrs ago which was followed by a period of neoglacial cooling, culminating in the little ice age (LIA). LÄS MER
2. Marine Geology and Holocene Paleoceanographyof the Southern Quark, Baltic Sea
Master-uppsats, Stockholms universitet/Institutionen för geologiska vetenskaperSammanfattning : The Understen-Märket trench is located in the Southern Quark and is the only deep-water connection between the Baltic Propper and the Gulf of Bothnia. Bathymetric mapping reveals a number of eroded channels and drift deposits exists on the seafloor, indicating that the area is heavily affected by current activity. LÄS MER
3. Aluminium Nitride-containing Steels for High-Temperature Low-Pressure Carburizing Processes
Master-uppsats, KTH/MaterialvetenskapSammanfattning : 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. Understanding the effect of temperature and time on Gamma prime coarsening for Nickel-base superalloy Haynes 282
Master-uppsats, KTH/MaterialvetenskapSammanfattning : Haynes 282 is a gamma prime (𝛾′)-strengthened nickel base superalloy developed in 2005, exhibiting a good combination of high temperature properties and fabricability. Microstructural features such as 𝛾′ and carbides play an important role in deriving the mechanical properties of the alloy during heat treatment. LÄS MER
5. Effect of carbon activity on microstructure evolution in WC-Ni cemented carbides
Master-uppsats, KTH/MaterialvetenskapSammanfattning : The aim of this work was to systematically study how the microstructure evolution is affected by the carbon activity in WC-Ni cemented carbides. Seven WC-9.59at%Ni alloys with different carbon activity were sintered at 1500 °C. LÄS MER