Search for dissertations about: "Dynamic strain ageing"
Showing result 1 - 5 of 13 swedish dissertations containing the words Dynamic strain ageing.
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1. The Plastic Flow Behaviour of Aluminium Alloys Exhibiting Dynamic Strain Ageing
Abstract : The phenomenon known as dynamic strain ageing, abbreviated DSA, has been known since the beginning of last century. It was first discovered as serrations in the load-elongation curve obtained upon deforming specimens of certain alloys in tension. This phenomenon became known as the Portevin-Le Chatelier (PLC) effect. READ MORE
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2. Monotonic and Cyclic Plastic Deformation of High-Strength Aluminium Alloys
Abstract : Dynamic strain ageing (DSA) and dynamic precipitation (DP) are two, closely interrelated, phenomena arising from the dynamic interaction between mobile solute atoms and dislocations. The occurrence of DSA and DP is confined to specific ranges of strain rate and temperature, and aluminium alloys are generally prone to experience DSA and DP already at ambient temperatures and conventional strainrates. READ MORE
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3. Improved Material Models for High Strength Steel
Abstract : The mechanical behaviour of the three advanced high strength steel grades, Docol 600DP, Docol 1200M and HyTens 1000, has been experimentally investigated under various types of deformation, and material models have been developed, which account for the experimentally observed behaviour.Two extensive experimental programmes have been conducted in this work. READ MORE
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4. Volumetric Analysis in Mechanical Behaviour and Physical Ageing of Polymers
Abstract : Volumetric changes associated with the deformation of ideal elastic solids depends on elastic constants of the solid and applied strain. Their magnitude is easily determined from the corresponding Poisson's ratios. READ MORE
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5. Influence of waxes on bitumen and asphalt concrete mixture performance
Abstract : This doctoral thesis consists of a literature review, presented in two papers, and another six papers describing experimental studies of the influence of different kinds of wax and polyphosporic acid on bitumen and asphalt concrete mixture properties. The literature review should give an extensive description of the field of knowledge concerning wax in bitumen. READ MORE