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- Title
Influence of Processing Route on the Surface Reactivity of Cu 47 Ti 33 Zr 11 Ni 6 Sn 2 Si 1 Metallic Glass.
- Authors
Soares Barreto, Erika; Uhlenwinkel, Volker; Frey, Maximilian; Gallino, Isabella; Busch, Ralf; Lüttge, Andreas
- Abstract
Recently, laser additive manufacturing (AM) techniques have emerged as a promising alternative for the synthesis of bulk metallic glasses (BMGs) with massively increased freedom in part size and geometry, thus extending their economic applicability of this material class. Nevertheless, porosity, compositional inhomogeneity, and crystallization display themselves to be the emerging challenges for this processing route. The impact of these "defects" on the surface reactivity and susceptibility to corrosion was seldom investigated but is critical for the further development of 3D-printed BMGs. This work compares the surface reactivity of cast and additively manufactured (via laser powder bed fusion—LPBF) Cu47Ti33Zr11Ni6Sn2Si1 metallic glass after 21 days of immersion in a corrosive HCl solution. The cast material presents lower oxygen content, homogeneous chemical distribution of the main elements, and the surface remains unaffected after the corrosion experimentation based on vertical scanning interferometry (VSI) investigation. On the contrary, the LPBF material presents a considerably higher reactivity seen through crack propagations on the surface. It exhibits higher oxygen content, heterogeneous chemical distribution, and presence of defects (porosity and cracks) generated during the manufacturing process.
- Subjects
TIN; COPPER-tin alloys; CRACK propagation (Fracture mechanics); COPPER surfaces; MANUFACTURING processes; METALLIC glasses; CASTING (Manufacturing process); SURFACE cracks
- Publication
Metals (2075-4701), 2021, Vol 11, Issue 8, p1173
- ISSN
2075-4701
- Publication type
Article
- DOI
10.3390/met11081173