October 15
@
1:00 PM
–
2:00 PM
UW-Madison Department of Materials Science and Engineering welcomes Dr. Daniel B. Miracle. His seminar, “Commercial Alloys Through a High-Entropy Lens”, will take place on Thursday, October 15 from 1-2 p.m. in MSE 265.
Bio
Dr. Dan Miracle served for 48 years in the Materials and Manufacturing Directorate of the Air Force Research Laboratory, including 24 years as a Senior Scientist. His research has covered nickel-based superalloys and intermetallic compounds; metal matrix composites; advanced aluminum alloys; and boron-modified titanium alloys. His current research explores metallic glasses and high-entropy alloys.
Dr. Miracle received a B.S. degree in Materials Science and Engineering from Wright State University, M.S. and Ph.D. degrees in Metallurgical Engineering from The Ohio State University, and an Honorary Doctor of Science from the Institute of Metal Physics, Ukrainian Academy of Sciences. Dr. Miracle is a Fellow of ASM, International; The Minerals, Metals & Materials Society (TMS); and the Air Force Research Laboratory. He is an Honorary Member of the Indian Institute of Metals and has received the Air Force Basic Research Award and the Presidential Rank Award. He is author or co-author of over 240 peer- reviewed articles and 7 book chapters, and is co- editor of 6 books. He has given over 220 plenary, keynote and invited talks around the world.
Abstract
After over 20 years of intense study, there is not yet a compelling high entropy alloy (HEA) application. To explain this, we hypothesize that a major fraction of HEAs are compositionally similar to many commercial alloys, especially those based on 3d transition metals. We explore this hypothesis by characterizing commercial alloys from a high entropy perspective – we calculate their ideal configurational entropy and lattice distortion. We also calculate the compositional distances between nearly 1500 commercial alloys and HEAs. We conclude that the HEAs studied to date have not displaced commercial alloys because many of the former have sufficient compositional similarity to the latter. We also show that three principal elements are sufficient to achieve exceptional properties, and that one of those elements typically reach concentrations as high as 75 at.%. To guide future work, we highlight compositional areas as yet untouched by both conventional alloys and the HEA approach.