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Jien-Wei Yeh-The Father of High-Entropy Alloys
When Professor Jien-Wei Yeh of the Department of Materials Science and Engineering published his research findings on high-entropy alloys he garnered considerable interest and succeeded in dispelling one of the longest-standing myths in the field of materials science. That was ten years ago, and since then high-entropy alloys has become an established field within materials science, and Yeh has come to be regarded as "the father of high-entropy alloys." In recent years Yeh has co-authored a book on the same topic together with noted figures is the field, B.S. Murty and S. Ranganathan. Titled High-Entropy Alloys, the book was published by Elsevier this year and is destined to become a standard textbook and reference work.
 
Yeh explains that in the field of materials science it was previously believed that alloys could only be produced with one or two main elements (aluminum, copper, etc.). By contrast, high-entropy alloys consist of at least five main elements, none of which has an atomicity exceeding 35%, making it rather like a fruit cocktail. Moreover, the elements included in an alloy and their proportion can be modified during the manufacturing process to meet various requirements. For example, an alloy's composition can be adjusted so that it will have a high resistance to heat, warping, or scratches.
 
For a long time it was widely believed that an alloy consisting of a multitude of elements would be excessively brittle. But one day while Yeh was driving, it suddenly occurred to him that this may in fact not be the case. He quickly assembled a number of his students into a research team and they began to conduct research on high-entropy alloys. However, it turned out to be a long and difficult process, and it was only after eight years of meticulously gathering data that Yeh was finally ready to publish the results. In his own words, "This sort of research is lonely and toilsome. It requires a lot of perseverance and innovative thinking."
 
However, during the lengthy research process an interesting interlude occurred when they happened to discover a new wear-resistant copper alloy which is now being commercially produced for use in CNC modules. For Yeh this demonstrates the wide applicability of his research in high-entropy alloys.
 
In Yeh's view, research in high-entropy alloys is still in its infancy, and is destined to become a key area in material sciences in the next century. Yeh also points out that this groundbreaking research was entirely conducted in Taiwan with support from the Ministry of Science and Technology, the Ministry of Economic Affairs, and a host of local researchers, thereby earning Taiwan a prominent position in the field of material sciences.
 
Co-authored with B.S. Murty and S. Ranganathan, two leading researchers in materials science, High-Entropy Alloys consists of 10 chapters and 120 pages. In addition to presenting the most recent research in the field, they also envision some of the directions in which future research is likely to move. This book is the first comprehensive introduction to high-entropy alloys, and is sure to become a standard textbook and reference work in materials science.
 
Jien-Wei Yeh’s research in high-entropy alloys constitutes a major breakthrough in materials science.

Jien-Wei Yeh's research in high-entropy alloys constitutes a major breakthrough in materials science.

Co-authored with B.S. Murty and S. Ranganathan, two leading researchers in materials science, High-Entropy Alloys is the first comprehensive introduction to high-entropy alloys, and is sure to become a standard textbook and reference work in the field.

Co-authored with B.S. Murty and S. Ranganathan, two leading researchers in materials science, High-Entropy Alloys is the first comprehensive introduction to high-entropy alloys, and is sure to become a standard textbook and reference work in the field.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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