About this Abstract |
| Meeting |
TMS Specialty Congress 2026
|
| Symposium
|
Energy Materials 2026
|
| Presentation Title |
Feasibility Study for the Manufacturing of Gas Turbine Blades Through Directed Energy Deposition |
| Author(s) |
Caroline Cristine de Andrade Ferreira, Rafael Humberto Mota de Siqueira, Sheila Medeiros de Carvalho, Daolun Chen, Milton SF Lima |
| On-Site Speaker (Planned) |
Milton SF Lima |
| Abstract Scope |
This study explored the manufacture of gas turbine blades using Direct Energy Deposition (DED) with AISI 431 L powder on an AISI 304 substrate. Six blade geometries were tested, revealing defect-free structures with a slight elemental dilution and hardness values of 250 HV (substrate) and 530 HV (deposit). Heat treatment reduced the hardness of the AISI 431 steel to 450 HV (260°C) and 350 HV (593°C). The as-deposited elastic modulus was ~230 GPa, with surface roughness averaging Ra = 23.58 µm and Rz = 278.38 µm. The compressive residual stresses from cooling were relieved after the heat treatment, enhancing the stability. Salt-spray tests demonstrated corrosion resistance for 1080 h. The findings emphasize parameter control and heat treatment to optimize material properties, supporting the viability of DED for aerospace and energy applications. |
| Proceedings Inclusion? |
Undecided |