About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
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Presentation Title |
Recreate New Life of the Periodic Table: High-entropy Alloys |
Author(s) |
Jien-Wei Yeh |
On-Site Speaker (Planned) |
Jien-Wei Yeh |
Abstract Scope |
Since ancient times, there has been an unbreakable myth in the manufacture of materials: it is believed that the more kinds of alloying elements are added in high proportions, the more difficult and brittle it is to alloy them together. To break the myth, “high-entropy alloys” was proposed in 2004 and defined as having at least five major elements. The name emphasized the high entropy effect which enhances multi-principal elements in a composition to form solid solutions. Severe lattice distortion, sluggish diffusion and cocktail effects also accompany high-entropy alloys in affecting microstructure and properties. Now, the high-entropy papers are growing exponentially and 5,900 in number till the end of 2020. The elemental periodic table has a new life under this composition concept providing unlimited compositions and properties. This talk briefly summarizes the four core effects and describes the current technology of high-entropy materials in the industries. |