Research interests

As a staff scientist at Lawrence Livermore National Laboratory, my research projects focus on three main areas within materials science. Firstly, I am engaged in the application of X-ray tomography techniques to study low density materials. This involves non-destructive imaging to visualize and characterize the internal structures and defects in materials with low densities. Secondly, I am researching in situ monitoring techniques to detect and analyze defects in real-time during metal additive manufacturing processes. Lastly, I am involved in utilizing X-ray diffraction for the analysis of metal additive manufacturing processes. This includes investigating the crystallographic structure and phase transformations in the manufactured metals to enhance their performance and quality. In addition to my current projects, I have also conducted previous research on dentine, exploring its structural and mechanical properties. By combining these three areas of study, my objective is to contribute to the advancement of materials science and additive manufacturing technologies, ultimately improving the quality and reliability of engineered materials.

Career path

7 years in the Nanoscale, Surface, and Interface Science group - Lawrence Livermore National Laboratory, Livermore, CA, USA

4 years at Charité - Universitätsmedizin Berlin - Julius Wolff Institute, Berlin, Germany

News Highlights

LLNL researchers develop real-time defect detection in metal Additive Manufacturing

High-energy X-rays leave a trace of destruction in bone collagen

LLNL discovers new piece of two-photon lithography by turning it on its head

Dentin nanostructures: A 'super-natural' phenomenon

Strong teeth: Nanostructures under stress make teeth crack resistant

Postdoc, Lawrence Livermore National Laboratory, Livermore, CA, USA, 2020

Ph.D., Materials Science, Technical University Berlin, Berlin, Germany, 2016

Dipl. Ing., Materials Science, Lille University Graduate School of Engineer, Lille, France, 2011

B.S., Physics and chemistry, François Rabelais University, Tours, France, 2008

Selected publications

J.-B. Forien et al., “Detecting missing struts in metallic micro-lattices using high speed melt pool thermal monitoring,” Additive Manufacturing Letters, vol. 4, p. 100112, Feb. 2023, doi: 10.1016/j.addlet.2022.100112.

K. Sauer, I. Zizak, J.-B. Forien, A. Rack, E. Scoppola, and P. Zaslansky, “Primary radiation damage in bone evolves via collagen destruction by photoelectrons and secondary emission self-absorption,” Nat Commun, vol. 13, no. 1, Art. no. 1, Dec. 2022, doi: 10.1038/s41467-022-34247-z.

V. A. Beck et al., “Inertially enhanced mass transport using 3D-printed porous flow-through electrodes with periodic lattice structures,” Proceedings of the National Academy of Sciences, vol. 118, no. 32, p. e2025562118, Aug. 2021, doi: 10.1073/pnas.2025562118.

A. Gaikwad, B. Giera, G. M. Guss, J.-B. Forien, M. J. Matthews, and P. Rao, “Heterogeneous sensing and scientific machine learning for quality assurance in laser powder bed fusion – A single-track study,” Additive Manufacturing, vol. 36, p. 101659, Dec. 2020, doi: 10.1016/j.addma.2020.101659.

J.-B. Forien et al., “X-ray diffraction and in situ pressurization of dentine apatite nanocrystals quantifies modulus stiffening upon carbonate removal,” Acta Biomaterialia, Sep. 2020, doi: 10.1016/j.actbio.2020.09.004.

J.-B. Forien, N. P. Calta, P. J. DePond, G. M. Guss, T. T. Roehling, and M. J. Matthews, “Detecting keyhole pore defects and monitoring process signatures during laser powder bed fusion: A correlation between in situ pyrometry and ex situ X-ray radiography,” Additive Manufacturing, vol. 35, p. 101336, Oct. 2020, doi: 10.1016/j.addma.2020.101336.

W. Chen et al., “Microscale residual stresses in additively manufactured stainless steel,” Nature Communications, vol. 10, no. 1, pp. 1–12, Sep. 2019, doi: 10.1038/s41467-019-12265-8.

T. Voisin et al., “Defects-dictated tensile properties of selective laser melted Ti-6Al-4V,” Materials & Design, vol. 158, pp. 113–126, Nov. 2018, doi: 10.1016/j.matdes.2018.08.004.

J.-B. Forien et al., “Water-Mediated Collagen and Mineral Nanoparticle Interactions Guide Functional Deformation of Human Tooth Dentin,” Chemistry of Materials, vol. 28, no. 10, pp. 3416–3427, 2016, doi: 10.1021/acs.chemmater.6b00811.

J.-B. Forien et al., “Compressive Residual Strains in Mineral Nanoparticles as a Possible Origin of Enhanced Crack Resistance in Human Tooth Dentin,” Nano Letters, vol. 15, no. 6, pp. 3729–3734, 2015, doi: 10.1021/acs.nanolett.5b00143.

For a full list, see: Google Scholar | ResearchGate | ORCID