A novel method to 3D-print fine-grained AlSi10Mg alloy with isotropic properties via inoculation with LaB6 nanoparticles

By Qiyang Tan, Jingqi Zhang, Ning Mo, Zhiqi Fan, Yu Yin, M. Bermingham, Yingang Liu, Han Huang, Mingxing Zhang. 2020

192 citations recorded by the source corpus.

Abstract Metal additive manufacturing offers a tool to bring formerly unmanufacturable, geometrically complex, engineered structures into existence. However, considerable challenges remain in controlling the unique microstructures, defects and properties that are created through this process. For the first time this work demonstrates how LaB6 nanoparticles can be used to control such features in Al alloys produced by Selective Laser Melting (SLM). A novel and efficient mechanical agitation process is used to inoculate AlSi10Mg powder with LaB6 nanoparticles which resulted in a homogenous, crack-free, equiaxed, very fine-grained as built microstructures. The substantial grain refinement is attributed to the good crystallographic atomic matching across the Al/LaB6 interfaces which facilitated Al nucleation on the LaB6 nanoparticles. The LaB6-inoculated AlSi10Mg exhibited near-isotropic mechanical properties with an improved plasticity compared with un modified AlSi10Mg.

Subfields: Automotive Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/a1327a8db2fd051df92e502a9d4c8d89a086868f

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Automotive Engineering

1. S. Babu
2. Han Huang
3. Ryan R. Dehoff

In Mechanical Engineering

1. S. Babu
2. P. Howes
3. Han Huang
4. G. Gibbons
5. A. Das
6. Mingxing Zhang
7. H. Kotadia
8. A. Shyam

Citations in the corpus

• A Novel Strategy to Additively Manufacture 7075 Aluminium Alloy With Selective Laser Melting (2021, methodology): “As aforementioned, the primary cause of hot-cracking is the large thermal stress induced by the rapidly cooling, and therefore large thermal gradient within the MPs.”
• Towards high-temperature applications of aluminium alloys enabled by additive manufacturing (2021, background): “LaB6 nanoparticles [151,152] as shown in Figure 11 (c,d).”
• A review of Laser Powder Bed Fusion Additive Manufacturing of aluminium alloys: Microstructure and properties (2021, background): “Their results showed that LaB6 nanoparticles act as nucleation sites for primary-Al and refine the microstructure.”