2026-10-13T06:20:06Z https://www.scidb.cn/oai

10.57760/sciencedb.34747 2026-06-16T15:55:57Z

2026-06-16 Synergistic effect of crystallographic orientation and porosity: Multi-mode corrosion mechanism of additive manufacturing Al-Fe-Mn-Sc-Zr alloy doi:10.57760/sciencedb.34747 en This study elucidates the corrosion behavior of an Al-Fe-Mn-Sc-Zr alloy processed across a VED spectrum (38.9~138.9 J/mm³) through systematic electrochemical and accelerated corrosion testing. We identify a threshold VED of 55.6 J/mm³ that yields optimal corrosion resistance, as evidenced by the lowest corrosion current density (1.29 μA/cm²) and minimal exfoliation-induced roughness (0.837 μm). In contrast, the sample processed at the lowest VED (38.9 J/mm³) exhibits severe intergranular attack, with a maximum depth of 104.62 μm and a corrosion current density of 21.38 μA/cm². Microstructural analysis reveals that intergranular corrosion susceptibility is governed by crystallographic orientation, with (111)-oriented grains showing the highest sensitivity, while exfoliation corrosion is primarily dictated by porosity. The sample with the highest porosity (8.399%, 138.9 J/mm³) demonstrates the greatest exfoliation tendency, with a surface roughness of 13.018 μm. These findings establish a microstructure-based rationale for corrosion control in additively manufactured aluminum alloys and provide critical guidelines for optimizing PBF-LB parameters toward enhanced corrosion performance. Laser powder bed fusion; Al-Fe-Mn-Sc-Zr alloy; Intergranular corrosion Dr.Jibing Chen PUBLIC https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset Science Data Bank