All articles tagged with #alloys
Scientists analyzing fallout droplets from Hiroshima Bay uncovered a new multicomponent iron-based alloy with an atomic structure not seen in conventional materials. The alloy formed under extreme, rapid cooling during the 1945 blast, and researchers say anthropogenic events can create previously unknown materials. The finding could inspire lighter, more heat-resistant materials and enhance understanding of nuclear fallout chemistry.
Researchers have developed a new cobalt-nickel-vanadium alloy with atom-by-atom engineering that remains strong and tough at extremely low temperatures, potentially revolutionizing materials used in space and cryogenic applications.
Caltech scientists have developed a novel 3D printing method called HIAM that allows precise control over the shape and composition of metal alloys, enabling the creation of materials with enhanced mechanical properties and microstructures, such as stronger copper-nickel alloys with potential applications in biocompatible devices and space components.
Caltech scientists have developed a novel 3D printing technique called hydrogel-infusion additive manufacturing (HIAM) that allows precise control over the shape and composition of metallic alloys, enabling the creation of stronger, more resilient materials with customizable properties, such as copper-nickel alloys, by fine-tuning their microstructure and composition.
Researchers at UCLA have used an advanced imaging technique to map the three-dimensional atomic coordinates of medium- and high-entropy alloys for the first time. By correlating the mixture of elements with structural defects, the team discovered a new way to boost the toughness and flexibility of these alloys. The study provides insights into the design of durable alloys and has the potential to unlock new properties in conventional alloys like steel. The researchers are also developing new imaging methods to further understand the structures and properties of these alloys.
Scientists have finally discovered why certain alloys, such as Invar, do not expand when heated. These alloys, which contain specific ratios of iron and other metals like nickel, exhibit an exception to the general rule that materials expand when heated. The researchers found that magnetism plays a crucial role in balancing out the entropy caused by heat, preventing the atoms in the alloy from moving further apart. This understanding could have applications in precise instrument manufacturing and infrastructure building, where heat-sensitive metals can cause problems. The study improves our understanding of thermal expansion in other magnetizable materials.
Researchers from the California Institute of Technology have discovered the secret behind the unusual behavior of Invar alloys, which do not change in size and density over a wide range of temperatures. By measuring the vibrational spectra and magnetism of Invar samples, the researchers found a delicate balance between thermal expansion caused by atom vibrations and magnetism. The interaction between vibrations and magnetism, such as altered frequencies of atom vibrations, helps maintain this balance. This finding could aid in understanding thermal expansion in other magnetic materials and developing materials for magnetic refrigeration.