Scientists have revolutionized the way metals are made by using lower and slower heating of alloys to control how atoms self-organize during material manufacturing. The discovery, published in Science by Monash University engineers in Australia, essentially rewrites what has been a century-old approach to alloy design.
The study reveals that lower temperatures and a slower heating process can produce an alloy double the strength of steel, three times stronger than aluminum, and around twice as strong as the same alloy produced using conventional methods.
Rather than fully melting metals at extremely high temperatures, researchers used a controlled heating process that allowed atoms to organize themselves into highly ordered, interconnected structures. This created what they call an atomic architecture, in which different structures form together and connect in a continuous way, without the microscopic defects found in conventional alloys.
They tested the method on an alloy of titanium, hafnium, tantalum, niobium and zirconium, which formed a tightly connected internal nanostructure made up of three distinct components. The material achieved a compressive yield strength of over two gigapascals while still retaining ductility, meaning it can bend without breaking.
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