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Summary Sentence: Join Materials Science and Engineering as they present their Materials Science and Engineering Seminars Series featuring Josh hacKer
Full Summary: No summary paragraph submitted.
Josh Kacher
Josh Kacher, Assistant Professor
School of Materials Science and Engineering
Georgia Institute of Technology
Abstract:
Degradation processes in metals such as fatigue crack formation and localized corrosion are inherently multiscale processes, ranging from nanoscale crack nucleation mechanisms to collective dislocation interactions ranging across hundreds of microns. Understanding these processes requires multiscale characterization approaches that reflect the nature of the processes. Advances in electron detector technology in both scanning and transmission electron microscopy, including the advent of direct-electron detectors, and increases in computational processing capacity have transformed electron microscopy-based characterization into a big-data analytics tool capable of multimodal image acquisition and high-resolution property mapping. This includes the ability to post-experiment select desired imaging conditions and map out the three-dimensional elastic strain tensor, crystal rotations, and dislocation density at length scales ranging from nanometers to centimeters. As these data are collected in spatially-defined maps, they facilitate direct correlation between damage metrics such as dislocation accumulation or crack initiation with microstructural features such as twin boundaries and second phase particles. In this talk, I will discuss the application of multiscale and multimodal electron microscopy techniques to understanding ductile fracture and fatigue damage, with examples taken from ductile fracture and localized corrosion processes in Al alloys.
Biography:
Josh Kacher is an assistant professor at Georgia Tech in the School of Materials Science and Engineering. He received his Ph.D. from University of Illinois at Urbana Champaign in 2012 and was a post doc at UC Berkeley from 2013-2015. During his time at Georgia Tech, he has received a number of awards, including the DOE Early Career Award, the ONR Young Investigator Award, the TMS Young Professional Development Award, and the Bradley Stoughton Award for Young Teachers from ASM. He has published 40 peer reviewed articles and has given over 30 invited talks and seminars.
Mark Losego invites you to join this Webex meeting.
Meeting number (access code): 738 483 863
Meeting password: ShhTDn8Aq22
Monday, March 23, 2020
3:00 pm | (UTC-04:00) Eastern Time (US & Canada) | 1 hr 10 mins
