Title

Elimination of Extraordinarily High Cracking Susceptibility of Aluminum Alloy Fabricated by Laser Powder Bed Fusion

Document Type

Article

Publication Date

3-20-2022

Publisher

Elsevier

Source Publication

Journal of Materials Science & Technology

Source ISSN

1005-0302

Abstract

Using the calculation of phase diagrams approach and Scheil solidification modeling, the Al-2.5Mg-1.0Ni-0.4Sc-0.1Zr alloy was designed, intentionally with an extraordinarily high cracking susceptibility, making it prime for solidification cracking during laser powder bed fusion. This study demonstrates the ability to mitigate even the most extreme solidification cracking tendencies in aluminum alloys with only minor alloying additions of Sc and Zr, 0.5 wt.% max. Furthermore, by employing a simple direct ageing heat treatment, good tensile mechanical properties were observed with a yield strength of 308 MPa, an ultimate tensile strength of 390 MPa, and a total elongation of 11%.

Comments

Journal of Materials Science & Technology, Vol. 103 (March 2022): 50-58. DOI.

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