Continuous development of the technological processes led to the necessity of using industrial equipment/installations made of high temperature resisting materials that provide the ability to work in heavily corrosive environments. The paper analyses two fusion welding options of dissimilar welded joints between two alloys, a cobalt based and a nickel based alloy. Here in are presented the results obtained after welding the two different materials using Tungsten inert gas (TIG) and Electron beam (EBW). Based on the results obtained after micrographic and macrographic examinations, it has been concluded that the two welding processes can be successfully used at dissimilar welded joints between the two types of material.

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The paper presents general description of an ultrasonic air filter used in industrial air filtration system and the experimental results obtained. The method can be used in air purification system from the highly polluting processing technology of an industrial shop (paint shops, foundries, welding constructions, forging, etc.). The ultrasonic system construction and the advantages of using ultrasounds in the pollutant air filtration and purification process and an ultrasonic filter designed are here presented. In this case, the transducer which is the most important element consist in two asymmetrical passive elements (reflector and radiant element). For the ultrasonic system design there are presented the principal theoretical elements and in the final the finite element analyze of the whole ultrasonic system. To start a different filtering system some considerations like the following are important: the construction should be as simple and easy to install in the working zone, do not require dismantling to clean the filter element, cleaning periodically when the pressure drop reaches a limit value by commanding the operation of the ultrasonic transducer, allow restraint of the finest particles leading to the final consumer (in some technological processes) pure air, have a much longer operating life than conventional filters, in the sense that the ultrasonic activated filter elements have a higher reliability, to achieve a pressure drop in a range of restricted values, practically to be kept constant or with very small variations, creating stationary waves to allow not only very fine particle retention but also air drying, allow easy maintenance, the operating costs of which do not exceed the costs of the classic ones.

The automotive industry continues to be one of the most dynamic and innovative. A revolution in propulsion systems that are becoming increasingly complex and must meet a number of extremely stringent environmental pollution requirements is currently witnessed. On the other hand, one of the systems that remains unchanged is the braking system that has been proving its efficiency for a very long time but with gradual continuous improvements. The presented work is based on tests and experiments performed in collaboration with the manufacturer Fermit S.A. which is one of the most experienced and long-standing actors in the automotive industry in Romania. They produce a wide range of brake pads for the automotive, heavy duty, and railway industries. Starting from the experiments that offer the input data in the modeling and simulation activity, the paper presents the analysis of the behavior of a braking plate produced by Fermit S.A. Based on the geometry provided by the manufacturer, the properties of the composite material that forms the basis of the braking element and the experimental data that are presented, an analysis is made with finite elements in which to study, analyze, and interpret data such as displacements and stress states that occur in the structure formed by the composite material and the metal support plate on which it is deposited.