A high-strength heat-resistant Al−5.7Ni eutectic alloy with spherical Al3Ni nano-particles by selective laser melting
Document Type
Article
Publication Date
10-1-2021
Abstract
Traditional high-strength wrought aluminum alloys are sensitive to cracks in additive manufacturing (AM) while the eutectic aluminum alloys can be reliably printed. To explore a high-strength heat-resistant aluminum alloys by AM, in this paper, we proposed to retard the solidification range by using an Al−5.7Ni alloy, thus alleviate crack formation tendency. The AM parts of this alloy was featured by uniformly distributed spherical Al3Ni nano-particles with an average size of ~33 nm, showing a novel coherent crystallographic relationship with the matrix, <110>Al//<113>Al3Ni and {111}Al//{211}Al3Ni. Excellent mechanical property was achieved in this crack-free alloy with tensile strength of 410 MPa at room temperature and 140 MPa at 300°C, mainly attributed to the dispersion strengthening from the Al3Ni nano-particles with superior thermal stability.
Publication Source (Journal or Book title)
Scripta Materialia
Recommended Citation
Deng, J., Chen, C., Liu, X., Li, Y., Zhou, K., & Guo, S. (2021). A high-strength heat-resistant Al−5.7Ni eutectic alloy with spherical Al3Ni nano-particles by selective laser melting. Scripta Materialia, 203 https://doi.org/10.1016/j.scriptamat.2021.114034