Sökning: "Cold Cracking"

Visar resultat 11 - 15 av 19 avhandlingar innehållade orden Cold Cracking.

1. 11. Inhomogenity in microstructures

   Författare :Jacek Komeda; KTH; []
   Nyckelord :;

   Sammanfattning : The purpose of the present thesis is to quantitativelycharacterise structural features which contribute to thematerial anisotropy and to relate developed parameters to thematerial properties. Various forms of structural inhomogeneitywere quantified with the help of comuterised image analysisusing quantitative metallography and statistical analysismethods. LÄS MER

3. 12. Experimental and analytical study of thermal mixing at reactor conditions

   Författare :Mattia Bergagio; Henryk Anglart; Horst-Michael Prasser; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-cycle thermal fatigue; Hilbert-Huang transform; large eddy; WALE; rainflow; inverse heat conduction; adjoint conjugate gradient; Energy Technology; Energiteknik; Fysik; Physics;

   Sammanfattning : High-cycle thermal fatigue due to turbulent mixing of streams at distinct temperatures is an interdisciplinary issue affecting safety and life extension of existing reactors together with the design of new reactors. It is challenging to model damage and thermal loads arising from the above mixing. LÄS MER

4. 13. Control of weldability : Research leading to the development of two new quenched and tempered tool steels

   Författare :Per Hansson; Hannerz Nils Erik; Torsten Eriksson; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap;

   Sammanfattning : The understanding of the hardenability is important in steel development with respect to weldability of steels as well as to the design of quenched and tempered steels.The common way to judge if steel is suitability to welding is the use of a carbon equivalent, which reflects the alloy content to the hardenability of the heat affected zone (HAZ). LÄS MER

5. 14. The isostatic pressure processing of high Tc superconductors and their properties

   Författare :John Niska; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materialteknik; Engineering Materials;

   Sammanfattning : The high Tc superconductors are highly anisotropic, ceramic materials which makes it difficult to sinter them at atmospheric pressure to full density. High porosity is detrimental to their mechanical and electrical properties, so the use of isostatic pressures was used to give higher density materials with improved properties. LÄS MER

7. 15. Tar and Condensable Hydrocarbons in Indirect Gasification Systems

   Författare :Mikael Israelsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; UCS; Tar; condensable species; DFB; HTR.; CS; CLR; SPA;

   Sammanfattning : Biomass gasification, which is a primary process step in the production of biofuels, yields a combustible gas mixture (raw gas). This raw gas consists of a wide range of species, from permanent gases to condensable hydrocarbons, which are collectively known as tar. LÄS MER