The welded metals characteristics produced by TIG welding or laser beam welding depend on heat input as a function of laser power and welding speed. High laser power and high welding speed have produced welded joint with a remarkable decrease in fusion zone size and an acceptable weld profile with high weld depth/width ratio. At duplex stainless steels the microstructure of welded metal, and heat affected zone is strongly influenced by cooling rate, which is depend on heat input as a function of laser power and/or welding speed. It was found that increasing welding speed the corrosion rate of welded joints decreased. In austenitic stainless steels appeared pitting corrosion in the base material as well as in the welding zone. In case of 2304 duplex stainless steel pitting corrosion appeared in welded metal and heat affected zone in case of autogenously welding, but at 2404 duplex stainless steel pitting appear more in the heat affected zone.
Unworthily we forget many great Hungarian engineers, who could be great role models for today's young engineers. In some respects, Tódor Kármán belongs to these forgotten engineers. That's why I present in my dissertation the life and work of Tódor Kármán. I deal specifically with his contemporary education system, because this was also due to his scientific work. During my scientific work, I reveal the most important works, studies of the great scientist, I am focusing on his space exploration activities before his age. In this respect, I will also talk about one of his followers, Dr. Antal Bejczy.
1908 októberében gördült ki a szerelőcsarnokból Galamb József és társai által tervezett Ford T-modell, amely máig tartó világsikert aratott. Az autó egyszerű kezelhetősége és megbízható konstrukciója, illetve a kedvező ára miatt annyira megnyerte a vevők tetszését, hogy a típust 1927-ig gyártották. A Ford Művek főkonstruktőre, az egyre sikeresebb Galamb József nem feledte el, hogy honnan származik. Amikor hazalátogatott, támogatta testvéreit egy makói Ford telephely és szerelőüzem kialakításában, működtetésében, valamint ösztöndíjat alapított, előadásokat tartott a szakmai közösségek tagjainak, és támogatta a makói református egyházat.
The innovation of the education methodology is important on base on the student feedback, because the student number is rising in the Hungarian higher education. I show my research results on base of 7 years works in material science subject what I built in the Óbuda University Faculty of Bánki Donát Mechanical and Safety Engineering. It can declare on base of the experiences that this innovation of the education gives results.
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