Search for dissertations about: "dislocations"
Showing result 1 - 5 of 137 swedish dissertations containing the word dislocations.
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1. Dislocations in silicon
Abstract : The topic of this thesis is theoretical studies of the electrical and structural properties in the elemental semiconductor silicon. Because of the numerous and powerful applications of semiconductors, e.g., rectifiers, transistors, solar cells and lasers, they have been the focus of huge amounts of research. READ MORE
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2. Numerical Modeling of Plasticity in FCC Crystalline Materials Using Discrete Dislocation Dynamics
Abstract : Plasticity in crystalline solids is controlled by the microscopic line defects known as “dislocations”. Decisive role of dislocations in crystal plasticity in addition to fundamentals of plastic deformation are presented in the current thesis work. READ MORE
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3. Modelling and simulation of short fatigue cracks
Abstract : The growth of short fatigue cracks deviates from the behaviour of long fatigue cracks even if subjected to the same nominal driving force. The influence from the microstructure is pronounced, while crack closure effects may not be that important as for longer cracks. READ MORE
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4. Microstructural Decay in High-Strength Bearing Steels under Rolling Contact Fatigue
Abstract : The work presented in this thesis aims to enhance our understanding of material decay in high-strength steels used for bearing applications. The primary objective is to investigate the microstructural changes in two high-strength steels: 52100 steels, a popular bearing steel, and Hybrid 60, a relatively new bearing steel designed for long fatigue life and use at elevated temperatures. READ MORE
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5. Creep Behaviour of Titanium Aluminides and its Relation to Phase Distributions and Dislocation Structures
Abstract : The need for more efficient gas turbines with lowered fuel consumption and thereby lowered emission has recently lead to increased interest in low-density, .gamma.-based TiAl intermetallic alloys as a replacement of e.g. READ MORE