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Article

Development of a Novel High-Temperature Al Alloy for Laser Powder Bed Fusion

1
Department of Mechanical Engineering, Politecnico di Milano, Via G. La Masa 1, 20156 Milano, Italy
2
Beam-IT, Strada Prinzera, 17, 43045 Fornovo di Taro (PR), Italy
*
Author to whom correspondence should be addressed.
Metals 2021, 11(1), 35; https://doi.org/10.3390/met11010035
Received: 4 November 2020 / Revised: 14 December 2020 / Accepted: 22 December 2020 / Published: 26 December 2020
(This article belongs to the Special Issue Materials for Sustainable Beam-Based Additive Manufacturing)
The number of available materials for Laser Powder Bed Fusion is still limited due to the poor processability of many standard alloys. In particular, the lack of high-strength aluminium alloys, widely used in aerospace and automotive industries, remains a big issue for the spread of beam-based additive manufacturing technologies. In this study, a novel high-strength aluminium alloy for high temperature applications having good processability was developed. The design of the alloy was done based on the chemical composition of the widely used EN AW 2618. This Al-Cu-Mg-Ni-Fe alloy was modified with Ti and B in order to promote the formation of TiB2 nuclei in the liquid phase able to stimulate heterogeneous nucleation of grains and to decrease the hot cracking susceptibility of the material. The new Al alloy was manufactured by gas atomisation and processed by Laser Powder Bed Fusion. Samples produced with optimised parameters featured relative density of 99.91%, with no solidification cracks within their microstructure. After aging, the material revealed upper yield strength and ultimate tensile strength of 495 MPa and 460 MPa, respectively. In addition, the alloy showed tensile strength higher than wrought EN AW 2618 at elevated temperatures. View Full-Text
Keywords: additive manufacturing; laser powder bed fusion; aluminium alloys; high temperature applications; aging additive manufacturing; laser powder bed fusion; aluminium alloys; high temperature applications; aging
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MDPI and ACS Style

Belelli, F.; Casati, R.; Riccio, M.; Rizzi, A.; Kayacan, M.Y.; Vedani, M. Development of a Novel High-Temperature Al Alloy for Laser Powder Bed Fusion. Metals 2021, 11, 35. https://doi.org/10.3390/met11010035

AMA Style

Belelli F, Casati R, Riccio M, Rizzi A, Kayacan MY, Vedani M. Development of a Novel High-Temperature Al Alloy for Laser Powder Bed Fusion. Metals. 2021; 11(1):35. https://doi.org/10.3390/met11010035

Chicago/Turabian Style

Belelli, Filippo; Casati, Riccardo; Riccio, Martina; Rizzi, Alessandro; Kayacan, Mevlüt Y.; Vedani, Maurizio. 2021. "Development of a Novel High-Temperature Al Alloy for Laser Powder Bed Fusion" Metals 11, no. 1: 35. https://doi.org/10.3390/met11010035

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