Characterization microstructure and mechanical behavior of WAAM silicon bronze CuSi3Mn1

• Published in: Materials letters Vol. 377; p. 137397
• Main Authors: Zykova, A.P., Panfilov, A.O., Nikolaeva, A.V., Semenchuk, V.M., Gurianov, D.A., Savchenko, N.L., Vorontsov, A.V., Tarasov, S.Yu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.12.2024
• Subjects: Microstructure; Silicon bronze CuSi3Mn1; Tensile strength; Wire arc additive manufacturing; Silicon bronze CuSi3Mn1; Microstructure; Wire arc additive manufacturing; Tensile strength
• ISSN: 0167-577X
• DOI: 10.1016/j.matlet.2024.137397

[Display omitted] •First WAAM silicon bronze with high aspect and equiaxed grains obtained.•Mn5Si3 and MnFe2Si precipitated from the interdendrite spaces.•Vertical hot cracks formed in the regions enriched with the silicides.•Samples showed strength anisotropy due to cracks. Silicon bronze CuSi3Mn1 wall has been built using WAAM that demonstrated its dendritic microstructure composed of both columnar and equiaxed α-Cu grains as well as Mn5Si3 and MnFe2Si particles formed inside the interdendrite spaces. Hot cracks were formed in the regions enriched with the silicides that greatly affected the strength of samples with their tensile axis oriented along the wall’s height (UTS 158 ± 10 MPa) as compared to that oriented along the deposition direction (UTS343 ± 14 MPa).