Essays about: "coarsening"

Showing result 6 - 10 of 18 essays containing the word coarsening.

  1. 6. Understanding the effect of temperature and time on Gamma prime coarsening for Nickel-base superalloy Haynes 282

    University essay from KTH/Materialvetenskap

    Author : Kevin Vattappara; [2019]
    Keywords : Haynes 282; gamma prime 𝛾′ ; Arc-heat treatment; COMSOL modelling; isothermal transformation; coarsening; Thermo-Calc simulations;

    Abstract : Haynes 282 is a gamma prime (𝛾′)-strengthened nickel base superalloy developed in 2005, exhibiting a good combination of high temperature properties and fabricability. Microstructural features such as 𝛾′ and carbides play an important role in deriving the mechanical properties of the alloy during heat treatment. READ MORE

  3. 7. Optimization of annealing parameters for SANDVIK 13C26 and 20C strip steels : By MODDE analysis and modified JMAK method

    University essay from KTH/Materialvetenskap

    Author : Ahamed Ameen; [2019]
    Keywords : Recrystallization; EBSD; Optimization; MODDE; JMAK analysis; strip steels;

    Abstract : The process optimization of continuous annealing furnace, RHF 125, for recrystallization annealing of two steel grades, Sandvik 13C26 and Sandvik 20C has been carried out. To recreate the continuous annealing process carried out in the roller hearth furnace in the industry, samples with different cold reduction rates were chosen from ongoing production lines. READ MORE

  4. 8. The Neoproterozoic Visingsö Group of southern Sweden : lithology, sequence stratigraphy and provenance of the Middle Formation

    University essay from Lunds universitet/Geologiska institutionen

    Author : Viktor Ahrenstedt; [2018]
    Keywords : Neoproterozoic; Visingsö Group; sequence stratigraphy; provenance; lithology; Earth and Environmental Sciences;

    Abstract : The depositional setting of the Neoproterozoic Visingsö Group has long been a subject of discussion. This study aims to provide additional insights into the lithological composition and provenance of the sediments and to provide a sequence stratigraphic framework in order to define the depositional setting. READ MORE

  5. 9. Machine Learning as a Data Driven Approach to Automate Multivariate Matching Methods

    University essay from Lunds universitet/Nationalekonomiska institutionen

    Author : Sebastian Schmidt; [2018]
    Keywords : Matching; Machine learning; Coarsened exact matching; Causal inference; Business and Economics;

    Abstract : This paper introduces machine learning to automate the coarsening choices in coarsened exact matching (CEM) as a monotonic imbalance bounding matching class. I suggest to replace the otherwise arbitrary multivariate stratification process with a binary classification tree. This way, I can minimise potential bias caused by subjective preferences. READ MORE

  6. 10. Effect of carbon activity on microstructure evolution in WC-Ni cemented carbides

    University essay from KTH/Materialvetenskap

    Author : Olivia Danielsson; [2018]
    Keywords : Cemented carbides; Hard metal; WC-Ni; Tungsten carbide; Nickel binder; Grain coarsening; Grain growth; Carbon activity; Size distribution; EBSD; Electron backscattered diffraction;

    Abstract : The aim of this work was to systematically study how the microstructure evolution is affected by the carbon activity in WC-Ni cemented carbides. Seven WC-9.59at%Ni alloys with different carbon activity were sintered at 1500 °C. READ MORE