| About this Abstract |
| Meeting |
2019 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Fatigue and Fracture III
|
| Presentation Title |
Effect of Internal Hydrogen on the Mechanical Behavior of Additively Manufactured Stainless Steels |
| Author(s) |
Thale R. Smith, Joshua d. Sugar, Christine Smudde, Dorian K. Balch, Chris San Marchi |
| On-Site Speaker (Planned) |
Thale R. Smith |
| Abstract Scope |
The solidification microstructure of additively manufactured (AM) stainless steel is more similar to the microstructure of welded materials than of wrought materials. The use of AM materials in harsh environments, such as high-pressure hydrogen, requires that we understand how these complex microstructures influence their mechanical behavior. Excellent combinations of tensile properties and fracture resistance can be achieved under ambient test conditions in AM stainless steels that possess minimal processing defects. This study investigates the tensile properties and fracture response of AM type 304L materials for high-pressure hydrogen applications. The effect of high-pressure hydrogen on the mechanical behavior of AM 304L materials fabricated via directed energy deposition (DED) or powder bed fusion (PBF) is evaluated by thermally-precharging the materials in high-pressure gaseous hydrogen. Microstructural and fracture surface characterization indicate that the solidification microstructure contributes to degradation of tensile ductility and fracture resistance of the AM materials in a hydrogen environment. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |