The usage of advanced high strength steels (AHSS) in structural automotive components has been broadened in the past few years to satisfy the strict specifications of the automotive industry. Besides showing excellent strength to weight rations, AHSS have several limitations due to the high loads required in cold forming and cutting tools, which decrease considerably the tooling performances. T...

Obtaining high levels of mechanical properties in steels is directly linked to the use special forming processes and addition alloying elements during their manufacture. This work presents a study hot-rolled steel strip produced achieve yield strength above 600 MPa, using niobium microalloyed HSLA with non-stoichiometric titanium (titanium/nitrogen ratio 3.42), rolled on Steckel mill. A major c...

Fine-grained steels, which belong to the HSLA (High-Strength Low-Alloy) group of are increasingly used for parts statically and dynamically loaded constructions. Due thermal effect welding, combined with inherent stiffness clamping part, residual stresses generated in HAZ (heat-affected zone) affect fatigue life sub-weld entire construction. In this article, a specific temperature cycle measure...

In this study, the effects of Mo and Nb on microstructure Charpy impact properties coarse-grain heat affected zone (CGHAZ) in high-strength low-alloy (HSLA) steels were investigated. The high-Mo steel had a lower volume fraction acicular ferrite (AF) higher granular bainite (GB) than those low steel. CGHAZ specimen AF GB compared to low-Mo specimen. This is because, an increase lowers transform...

One of the most critical problems related to welding is occurrence Hydrogen-Induced Cracking (HIC), and despite all efforts made mitigate this defect, it remains present in modern industry. Although Gapped Bead-on-Plate (G-BOP) test one practical methods for assessing susceptibility HIC, use a thick plate as base metal (BM) restricts its application. Considering that many materials, such High-S...

Themechanical performanceofTRIP-120, a novel transformation induced plasticity steel alloy, is evaluated for different loading cases and strain rates. The performance is compared with HSLA-100, a lowalloy steel developed by the United States Navy and currently used in naval hulls. The response of these materials under uniaxial tension and shear was investigated to the point of fracture at isoth...