Materials Science Division
Metallurgy and Advanced Microscopy Group
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Delivering metallurgical materials and manufacturing technologies that push the boundaries of innovation and supply agile and responsive solutions to problems that affect national security.
The Metallurgy and Advanced Microscopy Group is a diverse group of scientists with backgrounds in physical metallurgy and the manufacturing, testing, and characterization of metals and alloys. Our research is focused on process–structure–property relationships to establish linkages to materials development and performance.
Our projects prioritize application spaces critical to the national interest, including accelerated materials discovery and deployment for stockpile stewardship, capability development, and energy and defense. Our vision is to:
- Promote and grow cutting-edge metallurgical technologies and advanced characterization capabilities to address emerging needs in materials innovation
- Provide a trusted source of expertise for the LLNL community and beyond
Our capabilities
We address our mission space through capabilities and expertise in:
- Alloy design
- Advanced manufacturing
- Feedstock development
- Materials testing and characterization, including in situ techniques
- Mechanical and chemical properties of metals
- Materials under extreme conditions (temperature, strain rate, ambient environment)
- Surface modifications for performance enhancement
In the news
Our team
Leadership
Group members





Select publications
Achievement of Target Gain Larger than Unity in an Inertial Fusion Experiment
Physical Review Letters, 2024
H. Abu-Shawareb, S.R. Qiu, et al.
Additively manufactured b-Ti5553 with laser powder bed fusion: microstructures and mechanical properties of bulk and lattice parts
Journal of Materials Processing Technology, 2024
M. Wu, M Linne, J.-B. Forien, N.R. Barton, J. Ye, K. Hazeli, A. Perron, K. Bertsch, Y.M. Wang, T. Voisin
Critical role of slags in pitting corrosion of additively manufactured stainless steel in simulated seawater
Nature Materials, 2024
S. Sen-Britain, S. Cho, S. Kang, Z. Qi, S. Khairallah, D. Rosas, V. Som, T.T. Li, S.R. Qiu, Y. M. Wang, B. C. Wood, T. Voisin
Microstructural, phase, and thermophysical stability of CrMoNbV refractory multi-principal element alloys
Journal of Alloys and Compounds, 2024
J. Shittu, C.J. Rietema, M. Juhasz, B. Ellyson, K.L. Elder, B.J. Bocklund, Z.C. Sims, T. Li, H.B. Henderson, J. Berry, A. Samanta, T. Voisin, A.A. Baker, S.K. McCall, A. Perron, J.T. McKeown
Microstructure development during rapid alloy solidification
MRS Bulletin, 2024
K. Ji, A.J. Clarke, J.T. McKeown, A. Karma
Microstructural control of additively manufactured Ti6Al4V via in-situ large-area laser annealing
Scripta Materialia, 2024
C.J. Rietema, J.D. Roehling, W.L. Smith, K.M. Bertsch
True active surface area as a key indicator of corrosion behavior in additively manufactured 316L stainless steel
Materials & Design, 2024
S. Cho, S. F. Buchsbaum, M. Biener, J. Jones, M. A. Melia, J. A. Stull, H. R. Colon-Mercado, J. Dwyer, S.R. Qiu
All-day passive radiative cooling using common salts
Materials Horizons, 2023
M.D.R. Batista, A.L. Troksa, H.V. Eshelman, M. Bagge-Hansen, J.D. Roehling
Computational discovery of ultra-strong, stable, and lightweight refractory multi-principal element alloys. Part I: Design principles and rapid down-selection
npj Computational Materials, 2023
K.L. Elder, J. Berry, B. Bocklund, S.K. McCall, A. Perron, J.T. McKeown
Computational discovery of ultra-strong, stable, and lightweight refractory multi-principal element alloys. Part II: Comprehensive ternary design and validation
npj Computational Materials, 2023
K.L. Elder, J. Berry, A. Perron, B. Bocklund, J. Shittu, C.J. Rietema, H.B. Henderson, S.K. McCall, J.T. McKeown
Deformation mechanisms in an additively manufactured dual-phase eutectic high-entropy alloy
Acta Materialia, 2023
J. Ren, M. Wu, C. Li, S. Guan, J. Dong, J.B. Forien, T. Li, K.S. Shanks, D. Yu, Y. Chen, K. An, K.Y. Xie, W. Chen, T. Voisin, W. Chen
Explosive fragmentation of additively manufactured stainless steel
Journal of Applied Physics, 2023
M. Callahan, D. Sun, M.A. Linne, A.S. Wu, G. H. Campbell, B. Friedman, J. Rodriguez, S. Burke, A. Lodes, K. Hansen, K. Mickelson, R. Wraith, J. J. Nicolino, and H.-S. Park
Hydrogen in disordered titania: connecting local chemistry, structure, and stoichiometry through accelerated exploration
Journal of Materials Chemistry, 2023
J. Chapman, K.E. Kweon, Y. Zhu, K. Bushick, L.B. Bayu Aji, C.A. Colla, H. Mason, N. Goldman, N. Keilbart, S.R. Qiu, T.W. Heo, J. Rodriguez, B.C. Wood
Machine-to-machine variability of roughness and corrosion in additively manufactured 316L stainless steel
Journal of Manufacturing Processes, 2023
C.L. Clark, E.K. Karasz, M. Melia, D.E. Hooks, R. Hackenberg, H. Colon-Mercado, P. Ganesan, P. Renner, S. Cho, M. Wu, S.R. Qiu, J. Dwyer, Z. Rueger, T.J. Gorey, Z. Koehn, J.A. Stull
Hydriding of titanium: Recent trends and perspectives in advanced characterization and multiscale modeling
Current Opinion in Solid State and Materials Science, 2022
Y.K. Zhu, T.W. Heo, J. Rodriguez, P.K. Weber, R.P. Shi, B.J. Baer, F.F. Morgado, S. Antonov, K.E. Kweon, E.B Watkins, D.J. Savage, J.E. Chapman, N.D. Keilbart, Y.G. Song, Q. Zhen, B. Gault, S.C. Vogel, S.T Sen-Britain, M.G. Shalloo, C. Orme, M. Bagge-Hansen, C. Hahn, T.A. Pham, D.D. Macdonald, S.R. Qiu, B.C. Wood
Improving the laser performance of ion beam sputtered dielectric thin films through the suppression of nanoscale defects by employing a xenon sputtering gas
Optical Materials Express, 2022
P.B. Mirkarimi, C. Harthcock, S.R. Qiu, R.A. Negres, G. Guss, T. Voisin, J.A. Hammons, C. A. Colla, H.E. Mason, A. Than, D. Vipin, and M. Huang
Pitting Corrosion in 316L Stainless Steel Fabricated by Laser Powder Bed Fusion Additive Manufacturing: A Review and Perspective
JOM, 2022
T. Voisin, R. Shi, Y. Zhu, Z. Qi, M. Wu, S. Sen-Britain, Y. Zhang, S.R. Qiu, Y.M. Wang, S. Thomas, B.C. Wood
Re-envisioning laser sources and alloys for metal Additive Manufacturing
Procedia CIRP, 2022
M.J. Matthews, J.T. McKeown
Strong yet ductile nanolamellar high-entropy alloys by additive manufacturing
Nature, 2022
J. Ren, Y. Zhang, D. Zhao, Y. Chen, S. Guan, Y. Liu, L. Liu, S. Peng, F. Kong, J.D. Poplawsky, G. Gao, T. Voisin, K. An, Y.M. Wang, K.Y. Xie, T. Zhu, W. Chen
Discovering the nanoscale origins of localized corrosion in additive manufactured stainless steel 316L by liquid cell transmission electron microscopy
Corrosion Science, 2022
M. Tian, J.D. Choundraj, T. Voisin, Y.M. Wang, J. Kacher
Materials Genomics Search for Possible Helium-Absorbing Nano-Phases in Fusion Structural Materials
Advanced Science, 2022
H. Xu, S.Y. Kim, D. Chen, J.-P. Monchoux, T. Voisin, C. Sun, J. Li
Mechanical and Thermal Properties for Uranium and U–6Nb Alloy from First-Principles Theory
Applied Sciences, 2021
P. Söderlind, L.H. Yang, A. Landa, A. Wu
Toward multiscale simulations of tailored microstructure formation in metal additive manufacturing
Materials Today, 2021
J. Berry, A. Perron, J.-L. Fattebert, J.D. Roehling, B. Vrancken, T.T. Roehling, D.L. Rosas, J.A. Turner, S.A. Khairallah, J.T. McKeown, M.J. Matthews
Residual stress analysis of in situ surface layer heating effects on laser powder bed fusion of 316L stainless steel
Additive Manufacturing, 2021
W.L. Smith, J.D. Roehling, M. Strantza, R.K. Ganeriwala, A.S. Ashby, B. Vrancken, B. Clausen, G.M. Guss, D.W. Brown, J.T. McKeown, M.R. Hill, M.J. Matthews
Physics of large-area pulsed laser powder bed fusion
Additive Manufacturing, 2021
J.D. Roehling, S.A. Khairallah, Y. Shen, A. Bayramian, C.B. Boley, A.M. Rubenchik, J. DeMuth, N. Duanmu, M.J. Matthews
New insights on cellular structures strengthening mechanisms and thermal stability of an austenitic stainless steel fabricated by laser powder-bed-fusion
Acta Materialia, 2021
T. Voisin, J.-B. Forien, A. Perron, S. Aubry, N. Bertin, A. Samanta, A. Baker, Y.M. Wang
Ultra-low-density digitally architected carbon with a strutted tube-in-tube structure
Nature, 2021
J. Ye, L. Liu, J. Oakdale, J. Lefebvre, S. Bhowmick, T. Voisin, J.D. Roehling, W.L. Smith, M.R. Céron, J. van Ham, L.B. Bayu Aji, M.M. Biener, Y.M. Wang, P.R. Onck, J. Biener
Nondiffractive beam shaping for enhanced optothermal control in metal additive manufacturing
Science Advances, 2021
T.U. Tumkur, T. Voisin, R. Shi, P.J. Depond, T.T. Roehling, S. Wu, M.F. Crumb, J.D. Roehling, G. Guss, S.A. Khairallah, M.J. Matthews
Heavy ion irradiation response of an additively manufactured 316LN stainless steel
Journal of Nuclear Materials, 2021
Z. Shang, C. Fan, J. Ding, S. Xue, A. Gabriel, L. Shao, T. Voisin, Y.M. Wang, T. Niu, J. Li, T. Diaz de la Rubia, H. Wang, X. Zhang
Hydrogen uptake and its influence in selective laser melted austenitic stainless steel: A nanoindentation study
Scripta Materialia, 2021
J.-M. Park, Y. Zhao, T. Voisin, D.-H. Lee, S. Komazaki, Y. Ko, D. Kim, J.-Y. Suh, H.N. Han, Y.M. Wang, U. Ramamurty, J. Jang
Investigation of UV, ns-laser damage resistance of hafnia films produced by electron beam evaporation and ion beam sputtering deposition methods
Journal of Applied Physics, 2021
V. N. Peters, S. R. Qiu, C. Harthcock, R. A. Negres, G. Guss, T. Voisin, E. Feigenbaum, C. J. Stolz, D. Vipin, M. Huang
Imaging transient solidification behavior
MRS Bulletin, 2020
J.T. McKeown, A.J. Clarke, J.M.K. Wiezorek
In situ observations of high-strain-rate deformation and fracture in pure copper
Materials Today, 2020
T. Voisin, M.D. Grapes, T.T. Li, M.K. Santala, Y. Zhang, J.P. Ligda, N.J. Lorenzo, B.E. Schuster, G.H. Campbell, T.P. Weihs
Phase Stability in U-6Nb Alloy Doped with Ti from the First Principles Theory
Applied Sciences, 2020
A. Landa, P. Söderlind, A. Wu
Controlling grain nucleation and morphology by laser beam shaping in metal additive manufacturing
Materials & Design, 2020
T.T. Roehling, R. Shi, S.A. Khairallah, J.D. Roehling, G.M. Guss, J.T. McKeown, M.J. Matthews
A 3D nm-thin biomimetic membrane for ultimate molecular separation
Materials Horizon, 2020
T. Wang, S Liang, Z. Qi, M. Biener, T. Voisin, J.A. Hammons, I.C. Tran, M.A. Worsley, T. Braun, Y.M. Wang, J. Biener, T. Baumann, S. Kim, J. Ye
Origin and effect of film sub-stoichiometry on ultraviolet, ns-laser damage resistance of hafnia single layers
Optical Materials Express, 2020
C. Harthcock, S.R. Qiu, P.B. Mirkarimi, R.A. Negres, G. Guss, M.G. Menor, G. Bhowmik, and M. Huang