Investigation of microstructure and corrosion behavior of IN718 superalloy fabricated by selective laser melting

In the present study, the microstructure and corrosion behaviour of additively manufactured IN718 superalloy samples investigated. The specimens were fabricated using a selective laser melting method with different scanning strategies (island/continuous) and speed. The samples were then heat-treated with a standard procedure of homogenizing at 1080 °C (1.5 h), solution at 980 °C (1.0 h), and two-step aging at 720/620 °C. The microstructure,...