Sökning: "dictra"
Visar resultat 11 - 15 av 16 avhandlingar innehållade ordet dictra.
11. Some applications of CALPHAD techniques to diffusion reactions in gradient materials
Sammanfattning : In gradient materials, i.e. materials that have varyingproperties due to an inhomogeneous chemical composition, thereis usually a strong driving force for diffusion reactions inthe gradient zone. Such reactions may have a strong influenceon the properties of the material. LÄS MER
12. Precipitation Reactions at High Temperatures in 9-12% Chromium Steels
Sammanfattning : This thesis reports on quantitative investigations of microstructural changes, mainly precipitation reactions, occurring during heat treatment, ageing and creep of 9-12% chromium steels. Several alloys with varying composition have been investigated. LÄS MER
13. Thermal and Mechanical Behaviors of High Temperature Coatings
Sammanfattning : With superior oxidation and corrosion resistance, metallic coatings (i.e. diffusion coatings and MCrAlX coatings) are widely used to protect hot components made of superalloys in turbine engines. LÄS MER
14. Failure mechanisms in APS and SPS thermal barrier coatings during cyclic oxidation and hot corrosion
Sammanfattning : Thermal Barrier Coatings (TBCs) are advanced material systems that are being used in the hot sections of gas turbines such as combustor, turbine blades, and vanes. The top ceramic coating in TBCs provides insulation against the hot gases and the intermediate metallic bond coat provides oxidation and corrosion resistance to the underlying turbine components. LÄS MER
15. White Layer Formation during Hard Turning of Through-Hardened Martensitic and Bainitic AISI 52100 Steel
Sammanfattning : Increased demands for flexible manufacturing lines, shorter cycle times and reduced impact on the environment drives the need for optimization of today’s manufacturing. For machining of hardened steel parts (>45 HRC), grinding has been the obvious choice for many decades. However, hard turning has often been considered as a replacement due to e. LÄS MER