Materiais Avançados

Abstract: This study investigates the correlation among cooling rates, boron addition, and their subsequent effects on the microstructure and mechanical properties of niobium microalloyed steels, specifically with an intent to develop new fire-resistant steels. Slower cooling rates enhanced the ferrite transformation and (Nb,Ti)C precipitation, promoting a shift toward an equilibrium-phase Leia mais…

Abstract: Fire-Resistant Steels (FRS) are widely used to ensure building stability during fire incidents, enabling safe evacuation. In this study, a FRS alloyed with Nb, Mo, B, and Ti was cast, thermomechanically processed, and aircooled to achieve the “as received” condition. The yield strength (YS) was evaluated through tensile tests Leia mais…

Resumo: O tema aglomeração é pouco pesquisado de forma aberta em universidades ou instituições de pesquisa, ocasionando uma relativa dificuldade de se encontrar dados gerais sobre os processos existentes. Desta forma, buscando contribuir com o avanço desta área do conhecimento, foram levantados dados e aspectos gerais para a seleção de Leia mais…

Abstract: Nd-Fe-B magnets are a critical material for the green energy transition. However, price volatility makes the supply chain fragile, which makes the recycling process an alternative to reduce dependence on raw materials. Unfortunately, the recycling process introduces oxygen into the magnet, getting worse magnetic properties. Thus, this article studies Leia mais…

Abstract: Monitoring concrete structures is crucial for assessing the corrosion risk of steel reinforcement and optimizing maintenance strategies. This study evaluated the MnO₂/NaOH, Ag/AgCl, and Ti/MMO permanent, embeddable reference electrodes, which are rarely known or used in Brazil for corrosion monitoring. The electrodes underwent assessment tests, immersion tests in solutions Leia mais…