Microstructure, Mechanical, and Fatigue Properties of a Laser Powder Bed Fused Al-Cu-Mg-Ag-Ti-B (A205) Alloy

This paper aims at assessing the effect of heat treatment on fatigue behavior of a novel laser-powder-bed-fusion (L-PBF) fabricated Al-Cu-Mg-Ag-Ti-B alloy, known as A205. To this end, L-PBF samples were heat-treated including (i) stress-relieving, and (ii) T7 stabilizing over- aging. Upon printing and post-heat treatments, advanced microstructural characterizations, mechanical property measurements and force-controlled fatigue performance studies were conducted on the samples, systematically. The findings in this paper present useful information for the selection of appropriate heat treatment conditions, to facilitate control of the fatigue behavior in the L-PBF A205 material, which is of great significance for their high-demanding applications in aerospace sectors.