Search for dissertations about: "Michael Vynnycky"

Showing result 1 - 5 of 8 swedish dissertations containing the words Michael Vynnycky.

2. 1. Mathematical modelling and experimental studies of the electrolytic pickling of stainless steel

   Author : Nulifer Ipek; Michael Vynnycky; Olof Forsén; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electrolytic pickling; mass transfer; current distribution; electrolysis; two-phase flow; Fluid mechanics; Strömningsmekanik;

   Abstract : .... READ MORE

4. 2. Some aspects of convection as well as graphite and carbide formations during casting

   Author : Fareed Ashraf Khan; Michael Vynnycky; Pär Jönsson; Bo Rogberg; Hasse Fredriksson; Jessica Elfsberg; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; carbides; heat treatment; cast iron; ball bearing steel; casting; cooling rate; structure analysis; nodule distribution; melt stirring; nuclei; karbider; värmebehanding; gjutjärn; kullagerstål; gjutning; kylningshastighet; strukturanalys; nodulefördelning; smältrörelse; kärnor.; Metallurgical process science; Metallurgisk processvetenskap;

   Abstract : It is an established fact that segregation during casting affects the physical properties of carbon-based ferro alloys; this motivates the study of the segregation behaviour of carbon and carbide-forming solute elements. In this context, this thesis investigates two different situations: the effects of cooling rate and turbulence on the precipitation behaviour of the graphite nodules in nodular cast iron; the nature of carbide precipitation in a bearing steel grade and the effects of subsequent soaking on these carbides. READ MORE

5. 3. Validated Modelling of Electrochemical Energy Storage Devices

   Author : Niklas Mellgren; Anders Dahlkild; Michael Vynnycky; Jesper Oppelstrup; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lithium ion battery; polymer electrolyte fuel cell; modelling; model validation; parameter fitting; Fluid mechanics; Strömningsmekanik;

   Abstract : This thesis aims at formulating and validating models for electrochemical energy storage devices. More specifically, the devices under consideration are lithium ion batteries and polymer electrolyte fuel cells. A model is formulated to describe an experimental cell setup consisting of a LixNi0.8Co0. READ MORE

6. 4. On the Inoculation and Graphite Morphologies of Cast Iron

   Author : Haji Muhammad Muhmond; Michael Vynnycky; Hasse Fredriksson; Peter Schumacher; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials Science and Engineering; Teknisk materialvetenskap;

   Abstract : Research was conducted to understand the nucleation mechanism of graphite flakes and nodules and the effect of various elements on the growth morphology of graphite. Investigations were started on flake graphite cast iron. The effect of S on the graphite morphology and MnS was experimentally analysed. READ MORE

7. 5. Pores, inclusions and electromagnetic stirring : Topics from the continuous casting of steel

   Author : Arash Safavi Nick; Pär Jönsson; Michael Vynnycky; Jesper H. Hattel; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Teknisk materialvetenskap; Materials Science and Engineering;

   Abstract : This thesis deals with two topics of relevance to the continuous casting of steel,in view of their importance as regards the quality of the final solidified structure.The first concerns the precipitation of gas pores and inclusions in the interden-dritic region of the solidifying metal. READ MORE