Page 111 - MSAM-4-2

Materials Science in Additive Manufacturing Impact of cell angle on AlSi10Mg structures

A

B

C D

Figure 5. Comparison of the X-ray computed tomography reconstructed models of LPBF-built AlSi10Mg alloy and their corresponding three-dimensional
digital models. (A) Octa-A structure with 80% porosity (Octa-A P80), (B) Octa-A structure with 90% porosity (Octa-A P90). Numerical comparison of
theoretical and actual volumes of the LPBF-built AlSi10Mg alloy structures, (C) various porous structures with 80% porosity, and (D) various porous
structures with 90% porosity
Abbreviations: Octa: Octahedral; LPBF: Laser powder bed fusion

This approach helps reduce the effects of residual stress, pools have been widely studied to understand processing
facilitates a stable melt pool track, and minimizes defect parameters, melt pool stability, and solidification behavior.
formation. Due to the intrinsic nature of LPBF, cyclic These studies aim to minimize defects such as porosity,
42
heating and partial remelting of previous layers result in a cracking, residual stress, melt pool boundary overlap, and
distinct melt pool morphology that follows the laser scan lack of fusion, thereby optimizing the processing window
tracks. This promotes the formation of large columnar for various aluminum alloys. In addition to achieving high
42
grains extending across multiple melt pool layers along densification and minimal defects, features such as grain
the build direction, introducing significant anisotropy size and morphology, orientation, grain boundaries, melt
in strength and ductility across various metals. 34,51,52 The pool borders, and elemental segregation play some roles
morphology and size of single- and multi-track melt in determining both static 53-55 and dynamic mechanical
4,51

Volume 4 Issue 2 (2025) 7 doi: 10.36922/MSAM025130019