Effects of the microstructure and texture characteristics on mechanical properties of the Al–Ni–Cu–Fe alloy manufactured by laser powder bed fusion

• DOI: 10.1016/j.jmrt.2023.10.120
• Publication Date: 2023-10-15T14:05:44Z
• Authors: Kai-Chieh Chang; Jun-Ren Zhao; Fei-Yi Hung
• Keywords: Ductility (Earth science); Brittleness; Texture (cosmology)

In this study, the Al-Ni-Cu-Fe alloy was fabricated using laser powder bed fusion (LPBF), with controlled Fe content, to investigate its metallurgical effects. Furthermore, microstructural differences between coarse-grained (CG), fine-grained (FG) regions, and melt pool boundary were compared. The results showed that FG region exhibited grain-boundary precipitation strengthening grain orientation in randomly distributed, leading oriented columnar grains a small ratio of low-angle misorientations CG region. This prevented from developing temperature gradient texture provided solid foundation for high strength. Both (Al-4Ni-2Cu-1.4Fe) low (Al-4Ni-2Cu-0.7Fe) Fe-addition alloys strengths over 600 MPa. 1.4Fe contained more phases, contributing higher However, presence incoherent interfaces Al9FeNi α-Al lattice resulted reduced ductility. On other hand, 0.7Fe lower brittleness improved Overall, LPBF shows promising potential aerospace applications, comprehensive understanding mechanisms microstructure can expand application scope.