A collision between a regional train and a light vehicle in the parish of Quelfes, Olhão, resulted in one fatality and three injuries. The incident occurred at the level crossing near the Olhão Campsite as the train was traveling from Faro to Vila Real de Santo António. The deceased was 44 years old. Emergency services, including the Olhão Sapadores Firefighters, INEM, and GNR, were present at the scene with 17 operatives.

The article discusses the effects of various alloying elements on the mechanical properties and microstructure of aluminum-silicon (Al-Si) alloys, which are widely used in the automotive and aerospace industries. The addition of copper (Cu) to Al-Si-Mg alloys can lead to strength improvement and microstructural refinement. However, excessive Cu can increase porosity and reduce ductility. Magnesium (Mg) is responsible for precipitation hardening in cast Al alloys, but high amounts can promote embrittlement. Silicon (Si) content affects porosity distribution and mechanical properties, with higher Si content refining Fe-rich intermetallics and improving ductility. The article also covers the use of modifiers like strontium (Sr) and sodium (Na) to alter eutectic morphology and improve mechanical properties. Grain refiners such as titanium (Ti) and boron (B) are discussed for their role in grain size reduction. The article further explores the impact of iron (Fe) and elements like manganese (Mn), chromium (Cr), and beryllium (Be) on the modification of Fe-rich intermetallic phases, which can negatively affect the alloy's properties. The article is highly technical, focusing on the metallurgical aspects of Al-Si alloys and their optimization for industrial applications.