Timothy Lach

Tim G Lach

R&D Associate Scientist

Tim joined Oak Ridge National Laboratory as an associate research scientist in the Materials Science and Technology Division in February 2020 as a member of the Nuclear Energy Materials Microanalysis group. Previously, he was a research scientist in the Reactor Materials and Mechanical Design group in the Nuclear Sciences Division at Pacific Northwest National Laboratory. His research interests focus on the characterization and testing of advanced nuclear materials for fission/fusion energy and spallation neutron applications. In particular, he uses analytical electron microscopy (SEM and TEM) and atom probe tomography (APT) in conjunction with properties testing to elucidate processing-microstructure-property-performance relationships in materials exposed to extreme environments. He is an extensive user of the Low Activation Materials Development and Analysis laboratory (LAMDA) and the Center for Nanophase Materials Sciences (CNMS).


2020-present R&D Associate, Nuclear Energy Materials Microanalysis group, MSTD, ORNL

2018-2020 Materials Scientist II, Reactor Materials and Mechanical Design group, NSD, PNNL

2016-2018 Post-doctoral Research Associate, Reactor Materials and Mechanical Design group, NSD, PNNL; advisor: Dr. Thak Sang Byun and Dr. Dallas Reilly

Exceptional Contribution Award, 2019 – PNNL       

Outstanding Performance Award, 2016 – PNNL

Ph.D. 2016, Materials Science and Engineering, University of Illinois at Urbana-Champaign; Thesis advisors: Prof. Pascal Bellon and Prof. Robert Averback

B.S. 2010, Materials Science and Engineering, The Ohio State University

Associate Editor for the journal Frontiers in Nuclear Engineering - Nuclear Materials section

Lead organizer for the "Microscopy and Microanalysis of Materials under Multiple Environmental Extremes" symposium for M&M 2023, and "High Resolution Microscopy and Microanalysis of Materials under Extreme Environments" for M&M 2025.

Extensive reviewer for Acta Materialia, Journal of Nuclear Materials, Materials Characterization, and others.

Member of The Minerals, Metals, and Materials Society (TMS), American Nuclear Society (ANS), and the Microscopy and Microanalysis Society (M&M).

Member, TMS Nuclear Materials Committee

Instrument custodian for the Focused Ion Beam/Scanning Electron Microscopes (FIB/SEM) in the LAMDA laboratory.

Expertise in SEM-electron backscatter diffraction (EBSD), FIB/SEM, transmission electron microscopy (TEM), scanning TEM (STEM), STEM-EDS, and APT.