Search for dissertations about: "surface relief"

Showing result 6 - 10 of 41 swedish dissertations containing the words surface relief.

  2. 6. A Comparative Investigation of Gear Performance BetweenWrought and Sintered Powder Metallurgical Steel : Utilizing In-situ Surface Profile Measurements to Investigate theInitiation and Evolution of Micropitting and Pitting Damage

    Author : Edwin Bergstedt; Ulf Olofsson; Bengt-Göran Rosén; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gear testing; Micropitting; Pitting; Efficiency; Surface transformation; Kugghjulstestning; Micropitting; Pitting; Effektivitetsmätning; Yttransformationer; Machine Design; Maskinkonstruktion;

    Abstract : Vehicle electrification is a strong trend that introduces new challenges, such as increased input speed of the transmission and increased power density. Alsothe noise emittance of the gearbox is of increasing importance, as the sound of the gearbox is no longer masked by the internal combustion engine. READ MORE

  4. 7. Process chain simulation of forming, welding and heat treatment of Alloy 718

    Author : Joachim Steffenburg-Nordenström; Lars-Erik Svensson; Lars-Erik Lindgren; Fredrik Niklasson; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Forming; Welding; Stress relieve annealing; Heat treatment; Finite Element Simulation; Manufacturing process chain; Alloy 718; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : Manufacturing of aero engine components requires attention to residual stress and final shape of the product in order to meet high quality product standards.This sets very high demands on involved manufacturing steps to meet design requirements. READ MORE

  5. 8. Laser powder bed fusion processing and heat treatment of Ni-base superalloys: microstructure and properties

    Author : Abdul Shaafi Shaikh; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microstructure.; Additive manufacturing; heat treatment; Inconel 939; Haynes 282; superalloys; powder bed fusion – laser beam;

    Abstract : Nickel-base superalloys are indispensable materials for the energy and aerospace industries. The additive manufacturing (AM) of these materials by powder bed fusion – laser beam (PBF-LB) presents a valuable opportunity to improve component performance and ease manufacturing and supply chain complexity in these industries. READ MORE

  6. 9. Surface Energy Exchange and Hydrology of a Poor Sphagnum Mire

    Author : Erik Kellner; Harald Grip; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Sphagnum; Geovetenskap; myr; energibudget; ytresistans; vitmossa; hydrologiska modeller; TDR; Earth sciences; Geovetenskap; Hydrology; hydrologi;

    Abstract : Mires surface energy and water budgets govern the conditions for climatic, hydrological, ecological and carbon balance processes. The components of the water and surface energy budgets were quantified over two growing seasons for an open boreal mire. READ MORE

  7. 10. Controlling the Optical Properties of Vertical-Cavity Surface-Emitting Lasers

    Author : Josip Vukusic; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The insatiable demand for higher bandwidth in communication systems has led to the optical fiber trickling its way down to the consumer, gradually replacing the conventional copper cable. This trend is expected to continue, rendering these systems highly cost sensitive and therefore spurring the development of new breeds of semiconductor lasers, such as the vertical-cavity surface-emitting laser(VCSEL). READ MORE