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Researchers announce the discovery of a new alloy with the property of increasing hardness against temperature

محققان از کشف آلیاژ جدید با خاصیت افزایش سختی در برابر دما خبر می‌دهند

Researchers at City University of Hong Kong have accidentally discovered an alloy that not only does not soften with increasing temperature, but also retains its hardness more than before.

All metals that have been identified so far lose their toughness against heat. The higher the temperature, the softer the metal. But this metal works against the usual state. As the temperature increases, the hardness of this metal intensifies. Experiments have shown As the temperature rises to 727 ° C, the metal hardens. Hardening of the metal is accompanied by an increase in its spring property, which increases its efficiency in the industry. Until now, no other metal with similar behavior was known in the industry.

Alloy with different behavior

Different committees are involved in determining the behavior of metals under different conditions. For example, the elasticity of a material determines its resistance to elastic deformation – non-permanent – under stress. The higher the elasticity of a material, the greater the stiffness of the material. So it can be concluded that it is more difficult to deform. Scientists have previously thought that all metals soften with increasing temperature, and that expansion by heat is a common process between them, but the newly discovered metal does not follow this rule.

The chemical structure of this metal is very complex and unique. Unlike other metals, the elasticity of this metal increases with increasing temperature, turning it into a metal that is harder to deform at high temperatures. The scientific name of this alloy is “Co25Ni25 (HfTiZr) 50” or “Alinwar” alloy.

“When the alloy heats up to about 726 degrees Celsius, its hardness does not change at room temperature,” said Professor Yang Yong, of the Department of Mechanical Engineering at City University. The metal also experiences expansion at that temperature, which is strange behavior. “We have already seen metals expand at high temperatures when the metal has completely softened.”

Other special properties of this metal include resistance to deformation. The amount of energy required to deform this metal is about twice that of other metals. The high elasticity of this metal increases its springy properties and makes it difficult to deform.

“The elasticity of alloys allows them to retain more energy,” says Professor Young. So they do not generate heat and reduce the failure rate of the devices. Thus, the use of such alloys is very useful in making high-precision devices such as watches and timers. On the other hand, we know that the temperature on the surface of our sphere varies from -122 to -232 degrees Celsius. “So this metal can be considered as one of the best candidates for making parts in sending to the moon.”

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