Seznam abstraktů 2019: PLENÁRNÍ SEKCE

Because of their brilliant strength-weight ratio, nicely recyclability, outstanding noise and vibration damping properties as well as excellent dent resistance, magnesium materials offer a spread of uses in modern-day lightweight structures. As a result, a comeback of magnesium alloys is to be visible in a couple of industrial applications, especially in the automotive industry, as the potential for lightweight, cost-effective lightweight industrial construction associated with the lightest metallic engineering material helps to meet even stricter energy and environmental efficiency recommendations.
Commonly, casting processes have been the dominant magnesium manufacturing processes, but in the last decade, an increasing number of lightweight structural applications have been implemented with magnesium wrought alloys. In the presentation, the current state of developments focusing the twin-roll casting (TRC) of semi-finished products of magnesium alloys will be presented. By reducing the number of process steps in combination with a unique microstructure, the near-net-shape TRC process offers new options to provide semi-finished products, constructions and moldings, which meet the current and future requirements in terms of type, quantity and quality.

Hydrogen is a well-known chemical element for centuries however its use was highly limited as mainly industrial gas applied in metallurgy, chemical industry, glass industry and others. Within last two decades, hydrogen became significantly more popular thank to its use also as an alternative fuel and source of an energy. Beside hydrogen storage e.g. in hydrides and/or hydrocarbons hydrogen can be also compressed up to 1100 bar and then stored at the same pressure level thanks to the development of compression units and storage units. Regarding the on-board car storage, hydrogen is stored at 700 or 350 bar in composite pressure vessels and is being filled from mentioned 1100 or 1000 storage unit made of steel. The storage in full steel pressure vessel (Type I) is highly demanding task to fulfill all mechanical properties, pressure, SSC, cycle and hydrogen embrittlement requirements etc. Presented paper describes the background, advantages, disadvantages and issues related to the hydrogen storage and transport. Also, a comparison of hydrogen mobility and electro mobility is briefly submitted.