Modern aerospace applications demand the development of high-performance components with advanced materials. The development of nanomaterial-reinforced metal matrix composites is a practical approach to improve properties. Laser powder bed fusion (LPBF) is one of the popular additive manufacturing approaches to fabricating metal parts with complex geometric structures. This research investigates multiwalled carbon nanotube (CNT)-reinforced nickel-based alloy (Haynes 230) nanocomposite for property improvement. Three volumetric concentrations (0%, 2.5%, and 5%) of CNTs in the metal matrix are investigated with different printing parameters. Physical and mechanical characterizations are conducted on the test specimens. Results show that LPBF-printed Haynes 230 with 2.5 vol% CNTs has higher relative density (99.36%) and less porosity compared to those printed with 5 vol% CNTs. Mechanical test results show that LPBF-printed Haynes 230 with 2.5 vol% CNTs has the highest hardness, modulus of elasticity, yield strength, and ultimate strength than those printed with as-received Haynes 230 powder (with 0 vol% CNTs), Haynes 230 with 5 vol% CNTs, and commercial Haynes 230 plates. This study demonstrates the potential of CNT-reinforced nickel-based nanocomposites for applications requiring materials with outstanding mechanical properties, such as aerospace and defense.
Learning Objectives:
- Upon completion, participant will be able to understand the potential of laser powder bed fusion 3D printing technology for advanced material development.
- Upon completion, participant will be able to understand the important role of CNTs reinforcement for the property improvement of Ni-based nanocomposite.
- Upon completion, participant will be able to realize the potential of CNT-reinfoced Ni-based superalloy nanocomposites for applications requiring materials with outstanding mechanical properties
