Hydrogen embrittlement of Ti-Al6-V4 alloy manufactured by laser powder bed fusion induced by electrochemical charging

0584515 - FZÚ 2025 RIV CH eng J - Journal Article
Roudnická, Michaela - Kačenka, Z. - Dvorský, Drahomír - Drahokoupil, Jan - Vojtěch, D.
Hydrogen embrittlement of Ti-Al6-V4 alloy manufactured by laser powder bed fusion induced by electrochemical charging.
Metals. Roč. 14, č. 2 (2024), č. článku 251. E-ISSN 2075-4701
Institutional support: RVO:68378271
Keywords : hydrogen * hydrogen trapping * titanium * Ti-Al6-V4 * 3D printing * laser beam powder bed fusion
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.9, year: 2022
Method of publishing: Open access

The 3D printing of Ti-Al6-V4 alloy is subject to much current investigation, with Laser Beam Powder Bed Fusion (PBF-LB/M) being one of the most applied technologies. Ti-Al6-V4 alloy, despite its great material properties, is susceptible to hydrogen penetration and consequent embrittlement. The level of susceptibility to hydrogen penetration depends on the microstructural state of the alloy. In this work, we compare the effect of electrochemical charging by hydrogen on Ti-Al6-V4 alloy prepared by PBF-LB/M, either in the as-built state or annealed, and conventionally prepared alloy. At the same charging conditions, considerably different hydrogen concentrations were achieved, with the as-built 3D-printed material being the most susceptible. The changes in mechanical properties are discussed in relation to changes in microstructure, studied using microscopy, X-ray, and electron diffraction techniques.
Permanent Link: https://hdl.handle.net/11104/0352437