Search for dissertations about: "entropy of melting"

Showing result 6 - 10 of 19 swedish dissertations containing the words entropy of melting.

2. 6. Enzyme Cold Adaptation through Evolution of Protein Flexibility

   Author : Jaka Sočan; Johan Åqvist; Hugo Gutiérrez-de-Terán; Janez Mavri; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; EVB; Empirical valence bond method; Pancreatic elastase; α-amylase; Enzyme catalysis; Enzyme evolution; Cold adaptation; Temperature dependence of catalytic rates; Psychrophilic enzyme; Molekylär biovetenskap; Molecular Life Sciences;

   Abstract : What lives, evolves. Macromolecular catalysis is a process, central to both evolutionary and metabolic aspect of life, as it provides a systematic bias favouring certain chemical processes. READ MORE

4. 7. Atomistic simulations of lattice defects

   Author : Mattias Forsblom; Grimvall Göran; Kai Nordlund; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Theoretical physics; Teoretisk fysik; Physics; Fysik;

   Abstract : Mechanical properties of solids are governed by crystal imperfections. Computational materials science is largely concerned with the modelling of such defects, e.g. their formation, migration, and interaction energies. READ MORE

5. 8. Microstructure engineering of additively manufactured materials by powder bed fusion-laser beam: Cases for ferritic stainless steels and medium entropy alloys

   Author : Bala Malladi; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ferritic stainless steels; recrystallization; interstitial solid solution strengthening; phase transformation; inoculation; medium entropy alloys; Laser-based powder bed fusion; microstructural characterization;

   Abstract : Powder bed fusion laser beam (PBF-LB) is a powder bed fusion additive manufacturing process that is one of the most established and widely used techniques for manufacturing near net shape components. The unique characteristics of PBF-LB, such as the high cooling rates and local directional heat transfer, lead to the formation of unique microstructures. READ MORE

6. 9. Entropy-stabilized transition metal diborides for high-temperature applications

   Author : Ana Carolina Feltrin; Farid Akhtar; Alberto Vomiero; Laura Silvestroni; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Materials; Materialteknik;

   Abstract : Ultra-high temperature ceramics (UHTCs) are on the cutting edge as structural or protective materials that can withstand extreme environments such as hypersonic vehicles, nuclear reactors, and advanced turbine engines. These materials stand out for their melting temperatures above 2500 °C, high chemical stability, and retained mechanical resistance at temperatures higher than 1650 °C. READ MORE

7. 10. Alloy Design for Refractory High Entropy Alloys with Better Balanced Mechanical Properties at Both Room Temperature and Elevated Temperatures

   Author : Xiaolong Li; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high temperature strength; temperature dependence of yield stress; room temperature ductility; substitutional solid solutions; oxidation resistance.; solid solution softening and hardening; Refractory high-entropy alloys RHEAs ;

   Abstract : Motivated by the desire to improve the energy efficiency of gas turbines by operating them at higher temperatures (HT), which will contribute to a more energy efficient and carbonless society, the quest for novel ultrahigh-temperature materials can never be overwhelming. High entropy alloys, the recently emerged multi-component alloys with equiatomic or close-to-equiatomic compositions, are considered highly promising as next-generation ultrahigh-temperature materials. READ MORE