An effect of tempforming on the microstructure, carbide precipitation, and strengthening mechanisms high-strength low-alloyed steel has been analyzed. The quenched was subjected to 1 h tempering at a temperature 873 K, 923 or 973 K followed by plate rolling same temperature. Tempforming resulted in formation an ultrafine grained lamellar-type microstructure with finely dispersed carbides (Nb,V)...

generaly pressure vessels should withstand internal and external pressures in the form of static or periodic stresses. if the application of such a vessel requires the lowest possible weight, the fracture mechanics approach may be considened in design procedure in order to obtain the minimum wall thickness. in this work the thickness of the vessel wall was determined using k values and smallest...

Modern vehicle bodies make intensive use of high strength steel grades to meet the contradicting demand of lighter weight and simultaneously better mechanical performance. For many steel grades microalloying by niobium is the key to achieve their characteristic property profile. In HSLA steels niobium enhances the strength primarily by grain refinement. In interstitial free high strength steels...