The local approach to fracture (LAF) is a methodology aimed to calculate macroscopic fracture properties of a body, from the knowledge of the local stress strain field at the fracture site, and the modeling of the acting fracture mechanisms. In the present work, this method was applied to a CF8M steel, aged 30000 h at 325 °C, in order to elucidate if LAF could be able to describe the measured f...

The characterization and measurement of grain structures is of great importance to materials scientists because not only does grain size strongly affect the mechanical properties, but it also has an influence on physical properties, surface properties and phase transformations [1]. The ability to locate the grain boundaries in materials is critical for a wide number of applications, e.g. proces...

Laser beam welding is used in many areas of industry and research. There are strategies approaches to further improve the weld seam properties laser welding. Metallography often needed evaluate welded seams. Typically, images examined evaluated by experts. The evaluation process qualitatively provides welds. Particularly times when artificial intelligence being more processes, quantization that...

Vertical oscillation arc welding for narrow gap gas metal (NG-GMAW) has a relatively simple structure, and it is widely used in all-position pipeline field welding. However, some shortcomings, such as incomplete fusion defects on the sidewall interlayer. Aiming at resolving these mathematical model proposed to obtain appropriate parameters different positions. In this model, response surface me...

Abstract A36 and A53 steels are low carbon steel with relatively similar percentage, respectively 0,25-0,30% 0,25-0,29%. Both often used within the marine industry. The objective of this research is to figure out effect variation groove angle heat input process welding two different plates towards a metallography, tensile, bending test E71T electrode, as well figuring weld 18 mm thick plates. 5...

U-7.5Nb-2.5Zr cladded in Zircaloy-4 is one of the most studied fuel prototypes. The Nb and Zr are added to U stabilize body-centered cubic (BCC) gamma phase grant mechanical swelling resistance. undergoes α′′ transformation, generating compressive stresses due volume reduction. also can transform a combination α + γ2 (equilibrium phases), which known be hard brittle. This work had objective tes...

4340 steel powders were processed with an additive manufacturing process using the FFF (Fused Filament Fabrication) technique. A composite filament was developed to print samples and study effect of bed nozzle temperatures on its physical microstructural properties. The printed debinded sintered by: Solid State (SS) at 1300 °C or SLPS (Supersolidus Liquid Phase Sintering) 1420 °C. Metallography...

Abstract Regarding porosity formation and gas content, choosing the appropriate shielding for laser welding is essential achieving high-quality joints. Keyhole-induced tendency nitrogen content in SS 304 stainless steel welds were investigated based on gases during fiber welding. Beads-on-plate autogenous made at 5 kW continuous wave (CW) N 2 Ar mixtures. Optical metallography, micro-focused X-...