Correlation of LPBF process parameters and heat treatment with the corrosion behavior of AlSi10Mg alloy
Progress in Additive Manufacturing, cilt.10, sa.11, ss.10245-10264, 2025 (ESCI, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 10 Sayı: 11
- Basım Tarihi: 2025
- Doi Numarası: 10.1007/s40964-025-01238-7
- Dergi Adı: Progress in Additive Manufacturing
- Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus
- Sayfa Sayıları: ss.10245-10264
- Anahtar Kelimeler: Additive manufacturing, AlSi10Mg, Corrosion, Defects, Heat treatment, Microstructure
- Gazi Üniversitesi Adresli: Evet
Özet
This study investigates the corrosion resistance of LPBF-fabricated AlSi10Mg alloy, focusing on the interplay between process parameters and heat treatments. Volumetric energy densities ranging from 32 to 117 J/mm3 were employed, resulting in different microstructural features and defect types, including lack-of-fusion and keyhole pores. Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization (PDP) tests conducted in a 3.5 wt.% NaCl solution demonstrated that lower energy densities (< 78 J/mm3) exhibited improved corrosion resistance, while higher energy densities (≥ 78 J/mm3) led to accelerated corrosion. Stress-relief heat treatments were conducted on the samples with the best and worst corrosion resistance based on process parameters. Treatment at 200 °C had negligible impact on the silicon network and caused only a slight reduction in corrosion resistance, while treatment at 300 °C disrupted the silicon network near melt pool boundaries, leading to intensified selective corrosion.