| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture IV: Toward Confident Use in Critical Applications
|
| Presentation Title |
Optimization of Additively Manufactured Low Carbon Steels for Fatigue-critical Applications |
| Author(s) |
Matthew A. Ryder, Colt J Montgomery, Michael J Brand, Robin M Pacheco, John S Carpenter, Peggy E Jones, Diana A Lados |
| On-Site Speaker (Planned) |
Matthew A. Ryder |
| Abstract Scope |
Additive manufacturing (AM) provides unparalleled flexibility in component design, and a comprehensive understanding of the AM parts’ behavior is imperative for their implementation in fatigue-critical applications. Two low carbon steels fabricated by Laser Powder Bed (LPB) have been investigated in this study – in both as-fabricated and heat treated conditions – and compared to their wrought counterparts. Build parameters have been selected through meltpool geometry optimization, and used in the fabrication of tensile, fatigue, and fatigue crack growth specimens. Microstructure, yield and tensile strengths, and hardness have been evaluated for all materials and conditions. Residual stresses have been predicted using DANTE® simulations, and experimentally measured via x-ray diffraction, the contour method, and notch clamping on fatigue crack growth (compact tension) specimens. Through systematic high-cycle fatigue (R=-1) and fatigue crack growth (R=0.1, 0.8) testing and characterization, crack initiation and propagation mechanisms have been identified and used in the process-microstructure-performance optimization. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |