High-throughput experimental measurements for reliable establishment of materials databases and for accelerated alloy design

Ji-Cheng (JC) Zhao
University of Maryland
Virtual WebEx seminar
Wed, October 07, 2020 at 11:00 AM

Webex:  https://rensselaer.webex.com/rensselaer/j.php?MTID=ma93dc36e9599786d8e7…

This talk will review some recent advances in high-throughput experimental techniques for rapid collections of materials property data for simulations of materials properties. Localized property measurements on composition gradients created in diffusion multiples allow effective collection of composition-dependent properties, including thermal conductivity, heat capacity, coefficient of thermal expansion, and elastic constants. A newly developed forward-simulation analysis allows accurate measurement of impurity (dilute) diffusion coefficients from regular diffusion couple profiles without using isotope tracer experiments. The impurity diffusion coefficients together with interdiffusion coefficients are essential to the establishment of diffusion (mobility) databases for modeling the creep properties of materials and precipitation processes.  Recent development of dual-anneal diffusion multiples (DADMs) allow rapid and systematic collection of phase precipitation kinetics and morphological evolution data across wide ranges of compositions as a function of time and temperature, creating large datasets for validation and testing of model simulations.

JC Zhao

Dr. Ji-Cheng (JC) Zhao joined the University of Maryland in July 2019 as a Minta Martin Professor and Chair of the Department of Materials Science and Engineering (MSE). He was a professor at The Ohio State University (OSU) from 2008 to 2019 during which he took a leave from OSU from 2014 to 2017 to serve as a Program Director at the Advanced Research Projects Agency-Energy (ARPA-E) of the US Department of Energy. Before joining OSU in 2008, Dr. Zhao was a materials scientist at GE Global Research Center for 12 years (1995-2007). He holds 48 US patents and was the 2001 winner of the prestigious Hull Award from GE. An alloy he co-invented is widely used in GE gas turbines. Dr. Zhao serves on the ASM Board of Trustees for the 2019-2021 term. He is a Fellow of both ASM International and the Materials Research Society, and serves as an associate editor or member of the editorial board of five journals. Dr. Zhao was selected to receive the 2021 TMS William Hume-Rothery Award which “is presented annually to recognize a scientific leader for exceptional scholarly contributions to the science of alloys”.