In this study, Laser Powder Bed Fusion (LPBF) Inconel 718 is subjected to various heattreatments, namely double aging, solid solution + double aging, and homogenization +solid-solution + double aging, to investigate the effect of heat treatment on room- and high-temperature tensile properties. The results show that all three heat treatments increasehardness and room-temperature tensile strength, but greatly reduce ductility. With anincrease in tensile test temperature, the stress-induced Portevin-Le Chatelier (PLC) effectcan effectively prevent the occurrence of oxidation at grain boundaries and maintain a cer-tain ductility in the range of room temperature to 600°C. However, when the temperatureis 650°C, the PLC effect disappears, resulting in a high-temperature embrittlement effect.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Surfaces, Coatings and Films
- Metals and Alloys