Iranian Scientists Produce High Entropy Alloys with Unique Properties
“The alloy developed by the researchers of the University of Tehran exhibits remarkable mechanical properties at ambient temperature, which include significant yield strength and ultimate tensile strength along with very good ductility,” said Mohammad Javad Sohrabi, a materials engineering researcher in the laboratory of advanced steels and thermomechanical processes of materials at the University of Tehran.
“Regarding the material development, increasing strength usually causes a decrease in ductility. However, the alloy developed in this research simultaneously shows very good strength and ductility, which is superior compared to many materials developed so far,” he added.
“High entropy alloys (HEA) are a group of alloys that are composed of a combination of several elements with close ratios to each other, and this particular combination introduces a different approach from traditional alloying,” Sohrabi said.
“This innovative structure has paved the way for the design of alloys with unique properties and provides many opportunities for materials science engineers,” he explained.
High entropy alloys are alloys that are formed by mixing equal or relatively large proportions of (usually) five or more elements.
Prior to the synthesis of these substances, typical metal alloys comprised one or two major components with smaller amounts of other elements. For example, additional elements can be added to iron to improve its properties, thereby creating an iron-based alloy, but typically in fairly low proportions, such as the proportions of carbon, manganese, and others in various steels. Hence, high entropy alloys are a novel class of materials.
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