The microstructure of steel is decisive for its chemical, physical and mechanical properties. Depending on the parameters characterising liquid metal as well as the parameters of the steel casting influencing the crystallisation process, the macrostructure of casts and ingots consist of three, two or only one crystallisation zone. In steel ingots, its most frequent by consist of three zones: ch...

the effects of steel wire patenting process parameters on very fine interlamellar spacing in the pearlitic steel wire were investigated and the optimized condition of the process was achieved. in this work, the initial nanopearlitic structure was obtained in a 0.72 wt% carbon steel wire before the wire drawing process. the results were the minimum interlamellar spacing of 35 nm and maximum ulti...

The paper outlines a method for inclusion of the impact of eddy-currents in the model for dynamic prediction of current waveform and force of a switched reluctance machine. The method is based on the equivalent electric circuit model which accounts for the impacts of magnetic saturation and eddy currents in the magnetic core. A linear tubular switched reluctance machine, which includes solid st...

Transurethral resection is the most widely accepted treatment for obstruction of urinary outflow. The associated morbidity and mortality have led to a search for less invasive treatments. Expandable tubular stents of stainless steel mesh have been used successfully in patients with recurrent urethral strictures.' We assessed the safety and efficacy of these stents inserted into the prostatic ur...

Failure investigation was conducted on a bleed air connector of an aircraft engine that developed opening during service. The fabricated tubular structure wherein the flanges were circumferentially welded to bent pipe both ends. and made austenitic stainless steel AISI 321. Fractography study confirmed had failed by fatigue mechanism. Fatigue crack initiated at one weld joints. exact location i...

Nowadays, due to the escalation in construction of high-rise structures, the need for selecting a proper resistant structural system against earthquake and wind has increased significantly. These systems should show an optimized use of materials and should be presented as a hard and efficient structure. A good example of a high efficient system in high-rise buildings can be indicated is, the tu...

A 0.4C-2Si-1Cr-1Mo steel with an ultrafine elongated grain (UFEG) structure and an ultrafine equiaxed grain (UFG) structure was fabricated by multipass caliber rolling at 773 K and subsequent annealing at 973 K. A static three-point bending test was conducted at ambient temperature and at 77 K. The strength-toughness balance of the developed steels was markedly better than that of conventionall...

The aim of the article [1] was to discuss application steel-concrete composite structures in bridge engineering aspect structural design, analysis and execution. It pointed out that concept composition is far from exhausted new solutions interesting engineering, scientific aesthetic points view are constantly emerging. These latest trends presented against background executed Poland abroad. Par...