About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
Presentation Title |
Laser Powder Bed Fusion of Nickel Aluminum Bronze in Nitrogen Environment |
Author(s) |
Joseph A. Turner, Jazmin Ley, Wen Qian, Charles Nguyen, Sean Orzolek |
On-Site Speaker (Planned) |
Joseph A. Turner |
Abstract Scope |
Nickel aluminum bronze (NAB) is a unique material that provides high strength-to-weight ratio and high corrosion resistance making it ideal for defense and commercial marine applications. Laser powder bed fusion (LPBF) as an additive manufacturing technology offers superior surface finish but atmospheric conditions during LPBF play an important factor in attaining fully dense components. In this presentation, LPBF process development is described to manufacture high-density NAB components with porosity as low as 0.86% (Archimedes)/~ 0.01% (X-ray computed tomography). Although manufacturing was done in a nitrogen atmosphere, components were created without evidence of aluminum nitride (AlN) formation based on X-ray diffraction measurements. The presence of AlN could lead to material embrittlement and subsequent microcrack initiation upon loading. Additional process characterization results include melt pool evaluation, microstructure examination, residual stress investigation, and ultrasonic measurements. The use of LPBF with nitrogen atmosphere offers greater flexibility for component production from NAB and related alloys. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |