Mechanical behaviors and wear resistances of 3D-printed AISI 321 components for combustor swirler applications

Abstract

This comprehensive study investigates the mechanical behaviors and wear characteristics of 3D-printed AISI 321, with a specific focus on its applicability in combustion swirler components for the power generation industry. Through meticulous exploration of various process parameters and postprocessing techniques, valuable insights were gained into the performance disparities between layered and cast specimens. Analyses revealed intriguing comparisons of key data points: while layered specimens exhibited higher surface roughness (4.37 μm), they demonstrated a lower friction coefficient (0.26) yet a higher wear rate (4.79 × 10−7 mm3/N·mm) compared to their cast specimens. Further investigation into the influence of layering direction unveiled that horizontally layered specimens presented smoother surfaces (0.26 μm), higher hardness (340 HV 1), and improved wear resistance (2.61 × 10−7 mm3/N·mm) compared to vertically layered specimens. Furthermore, the study examined the friction and wear characteristics of layered specimens based on the contact surface, including the top, side, and bottom surfaces. Lastly, a comparison of the mechanical behavior and friction/wear characteristics of layered specimens and cast specimens was conducted, demonstrating that the layered specimens fabricated using the Laser Powder Bed Fusion (LPBF) method exhibited superior performance. These findings underscore the significant potential of 3D-printed AISI 321 in enhancing performance and sustainability in power generation applications, while highlighting the ongoing need for continued research and development to fully exploit the capabilities of additive manufacturing technologies.

Laser-beam powder bed fusion of magnetostrictive Fe81Ga19 alloys: parameter optimization, microstructural evolution and magnetostrictive properties

“…And many other methods, such as rolling [61] and casting [8], were also used to manufacture polycrystalline Fe-Ga alloy parts, however, which usually suffered from inferior magnetostrictive values and limited shapes and structures. In comparison, LPBF process offered high flexibility in the fabrication of diverse shapes and structures [62,63], thus facilitating the wider application of polycrystalline Fe-Ga alloys. In the quest for a more profound understanding of the magnetostrictive attributes of the prepared Fe 81 Ga 19 alloy, an evaluation of magnetostrictive behavior ensued under a dynamic magnetic field (dynamic magnetostrictive behavior).…”

Effects of liquid lubricants on the surface characteristics of 3D-printed polylactic acid

“…Additive manufacturing (AM), also known as 3D printing, has revolutionized the manufacturing industry by enabling rapid fabrication of complex geometries and customized parts from a wide range of materials [1]. Among various AM technologies, fused deposition modeling (FDM) has emerged as one of the most widely adopted techniques owing to its simplicity, cost-effectiveness, and versatility [2].…”