High strength Al alloy development for laser powder bed fusion

• DOI: 10.1142/s2424913021410010
• Publication Date: 2021-07-24T06:12:22Z
• Authors: Jin’e Sun; Baicheng Zhang; Xuanhui Qu
• Keywords: Equiaxed crystals

High strength Al alloy development is the key technique to additive manufacturing (AM) applied on lightweight of aerospace, automotive and military industry. Unlike conventional wrought Al–Si eutectic alloys available for AM process, new developed can be improved by in situ or additional nano-precipitated phase. This paper presents an overview high including metallic additives, such as Zr, Sc, Mn, Cu, etc., nanoparticle ceramics (TiB 2 , TiC, LaB 6 TiN) well carbon nanotubes (CNTs). The addition Zr Sc elements significantly prevents hot tearing enhances laser processed because nanoscale 3 (Sc, Zr) precipitated phases generate, facilitate heterogeneous nucleation matrix refine microstructure. Moreover, Mn Cu provides increment toughness through superimposed effect multi-element solid solution reinforcement precipitation strengthening role some CuMg Mn. growth process interrupted nanoceramics particles site which leads columnar grain transforms equiaxed grain. Furthermore, mechanism mutual solubility TiB TiC TiN systematically studied. Finally, assessment state research demands expansion powder bed fusion components are provided.