Search for dissertations about: "MnS inclusions in steel"

Showing result 1 - 5 of 7 swedish dissertations containing the words MnS inclusions in steel.

2. 1. Fatigue Anisotropy in Forged Components

   Author : Cornelius Temmel; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Inclusion Cluster; Low Sulfur; Machinability; Inclusion; Manganese Sulfide; Quenching Crack; Forging; Isotropic Quality; Steel; Anisotropy;

   Abstract : Ever-growing requirements on combustion engine efficiency of motor vehicles demand increasing service loads in powertrain components. Optimization of component material is therefore inevitable. A major detriment with many forged transmission components is their anisotropic mechanical behavior, not least during cyclic loading. READ MORE

4. 2. Characterization of Impurities in Different Ferroalloys and Their Effects on the Inclusion Characteristics of Steels

   Author : Yong Wang; Pär Jönsson; Andrey Karasev; Bart Blanpain; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ferroalloys; electrolytic extraction; metal surface; non-metallic inclusions; steel cleanliness; computational thermodynamics; ferrolegering; elektrolytisk extraktion; metallyta; icke-metalliska inneslutningar; stålrenhet; beräkningstermodynamik; Materials Science and Engineering; Teknisk materialvetenskap;

   Abstract :      Ferroalloys have become increasingly important due to their indispensable role in steelmaking. As the performance requirements of steel materials increase, it is necessary to have a better understanding of the impact of impurities in ferroalloys on the steel cleanliness. READ MORE

5. 3. Influence of Segregants on Creep Fracture in Powder Metallurgical Martensitic Stainless Steel

   Author : Mats Norell; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; AES; creep; segregants; powder metallurgy; prior particle boundaries; atomisation; SIMS; martensitic stainless steel; ESCA; cavities; powder surfaces;

   Abstract : This thesis deals with the behaviour of segregants in Powder Metallurgical (PM) 10%Cr steel and their impact on creep fracture. Particular interest is taken in determining the reaction products involved in creep cavitation and how these are connected to the powder surface reactions during the gas atomisation and consolidation (hot isostatic pressing). READ MORE

6. 4. Fracture behaviour and related microstructures of tool steels parted-off at high rates of strain

   Author : Kristina Ryttberg; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high-velocity parting-off; adiabatic cutting; high strain-rate deformation; TEM; steel; adiabatic shear band;

   Abstract : Increasing steel prices and environmental aspects have put forward the demand to reduce material consumption in manufacturing industry and near-net-shape manufacturing techniques have thus become increasingly important. High-velocity parting-off, or adiabatic cutting, has shown to result in very low material waste as well as narrow dimensional tolerances of parted-off samples. READ MORE

7. 5. Evaluations of Non-metallic Inclusionsin Ca-treated Steels and Their Effect on the Machinability

   Author : Hongying Du; Andrey Karasev; Pär Jönsson; Lauri Holappa; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; non-metallic inclusions; Ca treatment; stainless steel; machinability.; icke-metalliska inneslutningar; kalciumbehandling; rostfritt stål; skärbarhet.; Teknisk materialvetenskap; Materials Science and Engineering;

   Abstract : In recent decades, a considerable development of steel with respect to the performance of steel has taken place, which also has resulted in large challenges to process these steel grades. Therefore, it is essential to make suitable modifications of non-metallic inclusions (NMI) in the steelmaking process and to have a good control of its characteristics to meet the target mechanical properties and to obtain a good machinability. READ MORE