Influences of Introduced Oxides Particles on Superalloy 718

Additive manufacturing has opened more paths for introducing oxide particles into superalloys, to potentially provide oxide dispersion strengthening at high temperatures. This provided the opportunity to study how such dispersions can influence microstructure and failure modes for superalloy 718. The objective of this study was to compare monotonic failure modes for additively manufactured superalloy 718 having introduced oxide particles. The oxide particles were introduced into 718 powder using two different powder mixing methods. The superalloy for each case was then produced by laser powder bed fusion additive manufacturing. Specimens were subsequently given consistent thermal treatment paths and subjected to tensile and creep tests at varied temperatures. Observed microstructures and failure modes will be discussed.