Effect of Heat Treatment on the Evolution of Structural and Phase State in Wire Electron Beam Additively Manufactured Al–12Si Alloy

• Published in: Russian physics journal Vol. 67; no. 8; pp. 1172 - 1179
• Main Authors: Zykova, A. P., Panfilov, A. O., Nikolaeva, A. V., Gurianov, D. A., Chumaevskii, A. V., Kolubaev, E. A., Tarasov, S. Yu
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 2024; Springer Nature B.V
• Subjects: Aluminum base alloys; Banded structure; Coarsening; Condensed Matter Physics; Electron beams; Hadrons; Heat treatment; Heating; Heavy Ions; Interlayers; Iron; Lasers; Mathematical and Computational Physics; Mechanical properties; Nuclear Physics; Optical Devices; Optics; Phase transitions; Photonics; Physics; Physics and Astronomy; Silicon; Theoretical; Thermal cycling; Wire; mechanical characteristics; microstructure; normalization; electron beam additive manufacturing; anisotropy; Al–12Si; quenching
• ISSN: 1064-8887; 1573-9228
• DOI: 10.1007/s11182-024-03230-0

The effect of heat treatment on the structural evolution, phase transformation, and mechanical strength of Al–12Si obtained using wire electron beam additive manufacturing has been investigated. The as-built Al–12Si alloy was characterized by structural inhomogeneities in the form of interlayer bands with coarsened Si particles resulted from cyclic reheating of the solidified metal. Quenching the as-built samples resulted in the increase of the volume fraction of Al/Si eutectics by 9% with simultaneous refinement of Fe-containing particles. This structure allows obtaining the combination of strength and plasticity better than that of the asbuilt sample. Annealing leads to coarsening of both Si and Fe-containing particles, thereby increasing the Al/Si volume fraction and impairing the mechanical characteristics.