Details

Autor(en) / Beteiligte

• Kessler, Hannah D.
• Sherman, Ryan J.

Titel

Tension and Charpy V-notch impact properties of wire arc additively manufactured ER80S-Ni1

Ist Teil von

• Structures (Oxford), 2024-03, Vol.61, p.106134, Article 106134

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Limited knowledge of the material behaviors of wire arc additively manufactured (WAAM) steels prevents their adoption into the structural engineering industry. American Welding Society (AWS) ER80S-Ni1 is a welding wire feedstock with inherent corrosion resistance which is compatible with United States ASTM A709 Grade 50W steel, a corrosion-resistant grade commonly used in bridge construction. The objective of the current study was to demonstrate that WAAM ER80S-Ni1 can achieve appropriate material properties for structural applications. Four material characterization walls using ER80S-Ni1 feedstock were fabricated at three interpass temperatures. Tension and Charpy V-notch (CVN) impact datasets were generated for each wall in different orientations with respect to the build direction (BD) of the component to quantify the extent of anisotropy and the effects of interpass temperature in WAAM ER80S-Ni1. Additionally, the tested values were compared to the requirements of the American Welding Society (AWS) and American Association of State Highway and Transportation Officials (AASHTO) standards. No significant anisotropy was noted for yield and ultimate stress, while low levels of anisotropy were noted for elongation at fracture of the tension specimens and impact energies of the CVN specimens. Yield and tensile strength generally increased with decreasing interpass temperature and elongation generally decreased with decreasing interpass temperature. The CVN specimens with their notches oriented parallel to the BD generally performed similarly regardless of interpass temperature; however, the high interpass temperature specimens with their notches oriented parallel to the deposition direction (DD) generally had higher impact energies than the low interpass temperature specimens. The average yield and tensile stresses were found to not meet the AWS minimum requirements, but the average elongation at fracture exceeded the minimum required value. Finally, all CVN specimens tested far exceeded the AASHTO requirements for all temperature zones.