Alain Reiser

I am an Assistant Professor at the Department of Materials Science and Engineering at KTH. My research group aspires to develop next-generation additive manufacturing processes that bridge the micro- and meso-scales, employs laser-based high-strain-rate micromechanics to study materials behavior at extreme strain rates, and in general focuses on structure-property relationships of various alloy systems.

I was a postdoc fellow at the Massachusetts Institute of Technology (2021-2023) and a postdoctoral researcher at ETH Zürich (2020). I graduated from ETH Zürich (PhD 2019, MSc 2012 (ETH Medal), BSc 2010).

 

News

04.11.2024

In my recent News & Views article published in Nature Materials [link here: https://rdcu.be/dYzKr], I spotlight the pioneering work of Gary Cheng and his team on their innovative two-photon decomposition method for direct laser writing of metals. This technique opens new possibilities for high-precision fabrication, pushing boundaries in nanoscale additive manufacturing of metals.

The News article includes an updated throughput vs. feature size chart for all metal 3D microprinting techniques (introduced in our 2017 Adv. Mat. review). This new version adds a comparison of processing temperatures and provides up-to-date throughput and resolution data, offering fresh insights into the relationship between efficiency, resolution and process compatibility in nanoscale 3D printing of metals. I hope the new chart provides valuable insights for those exploring nanoscale fabrication.

-----------------------------------------------------------------------------------------

Laser-induced particle impact testing with particle multitudes!
https://doi.org/10.1016/j.actamat.2024.120301

Our latest work outlines new opportunities for laser-induced particle impact testing (LIPIT): the study of many-particle phenomena with a quantitative view of the behavior of single particles.

Since a decade, LIPIT is driving advances in our quantitative understanding of high-velocity particle impacts and high-strain-rate micromechanics. However, single particle experiments do not speak to the inherently multi-particle phenomena known for example to influence cold-spray coating structure and properties.

Our work, published in Acta Materialia, demonstrates the deposition of particle-stacks with exact knowledge of their particle-velocity and -size spectra, and makes first statistical connections between particle kinetics and coating structure (strain and recrystallization, or particle velocities and coating defects).

I think we can look forward to a new era of multi-particle sequence experiments that explore the complexities of particle-based processes with powerful single-particle resolution!