The aim of this study is to assess the levels of airborne ultrafine particles emitted in welding processes (tungsten inert gas [TIG], metal active gas [MAG] of carbon steel, and friction stir welding [FSW] of aluminum) in terms of deposited area in pulmonary alveolar tract using a nanoparticle surface area monitor (NSAM) analyzer. The obtained results showed the dependence of process parameters...

The formation of ZnSe via a mechanically-induced self-sustaining reaction (MSR) from a Zn/Se mixture showed that only size reduction and mixing of the reactants without product formation occurred during the induction period prior to ignition. Therefore, all mechanical energy supplied by the planetary mill during this time, called the ignition time (tig), was used exclusively in the activation o...

Applying non-uniform heat in welding causes residual stress and distortion, which affects the life of components. In present study, distortion Duplex 2205 stainless steel A-TIG were investigated numerically experimentally. The optimal parameters for highest penetration depth welded samples obtained Uncoupled thermal-mechanical analysis using ABAQUS 2017 software has been done. Goldak's measured...

In the quest for energy efficient circuits, considerable focus has been given to steep slope and polarity-controllable devices, targeting low supply voltages and reduction of transistor count. The recently proposed concept of the three-independent gated (TIG) Si-FinFETs with Schottkybarrier (SB) has proven to bring both functionalities even in a single device. However, the

The study focused on the standalone TIG and MIG welding combined effect, emphasizing microstructural properties strength of welded joint, especially heat-affected zone. literature revealed that both techniques their combination have full penetration in terms weld, HAZ for TIG-MIG has a larger width comparison with MIG. joints usually demonstrate ductile fracture compared or joints. However, it ...

We define a bidireccional bottom-up parser for Tree Adjoining Grammars (TAG). This parser is a mixture of a defined bidireccional bottom-up parser for TAG and a new parser for Tree Insertion Grammars (TIG) that we present here. We show that the new mixed parser for TAG presents a significative reduction of the theoretical complexity.

Anais do Congresso Internacional de Engenharia Mecânica e Industrial (2764-4294) - Estudo Da Diluição E Aporte Térmico Na Soldagem Tig, Aplicada No Material Vc131 Sob Diferentes Tipos De Corrente Polaridade

Abstract The influence of keyhole TIG (K-TIG) welding parameters on the weld geometry and defects a new nickel-based superalloy VDM Alloy 780 alloy were investigated using statistical design experiment, microstructures heat-affected zone (HAZ) fusion (FZ) K-TIG-welded characterized. No cracks are found in FZ HAZ. Travel speed significantly influences minimum width (Wm), face root excess metal, ...

The beneficial effect of the friction stir processing (FSP) technique for improving properties fabricated additive parts through microstructural refinement and repairing metallurgical defects has shown its ability to be integrated into a hybrid manufacturing system. In present work, conventional GMAW TIG-based processes were further post-processed with process (FSP). case + processed beads, imp...