Proton irradiation and characterization of additively manufactured 304L stainless steels

B. P. Eftink, J. S. Weaver, J. A. Valdez, V. Livescu, D. Chen, Y. Wang, C. Knapp, N. A. Mara, S. A. Maloy, G. T. Gray

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Irradiations were performed with 1.5 MeV protons to 0.6 dpa at 40–150 °C on additively manufactured (AM) 304L stainless steel and the changes in microstructure and mechanical behavior after irradiation were compared to wrought 304L stainless steel. All microstructural and hardness results after irradiation suggest the samples evolve toward a similar state, despite significant differences in the unirradiated microstructures and hardness values. A TEM and nanoindentation-based investigation of before and after proton irradiation at 40–150 °C is presented. Results are interpreted in terms of initial dislocation content, dislocation structures, and microstructural and chemical homogeneity.

Original languageEnglish (US)
Article number152007
JournalJournal of Nuclear Materials
StatePublished - Apr 1 2020

Bibliographical note

Funding Information:
This work was performed at Los Alamos National Laboratory. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is operated by Triad National Security, LLC, for the National Nuclear Security Administration of the U.S. Department of Energy. Work was supported by the LANL Dynamic Materials Properties Program, United States . This work was performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Dr. Saryu Fensin is acknowledged for fruitful discussions.


  • Additive manufacturing
  • Dislocation structures
  • Irradiated metals
  • TEM
  • X-ray diffraction

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