The mechanisms underlying the enhanced high-temperature properties of GRX-810

The demand for metal alloys that can perform at extreme temperatures above1100 °C while remaining manufacturable has sparked renewed interest inprintable oxide dispersion strengthened (ODS) alloys. Recently, NASA devel-oped an ODS alloy designed for additive manufacturing, known as GRX-810,which has demonstrated exceptional tensile and creep performance at tem-peratures of 1093 °C and higher. In the present study, tensile tests of GRX-810are conducted up to 1316 °C and creep tests are performed in both the hor-izontal and vertical orientations, relative to the build direction. Thermalcycling is executed at 1100 °C, 1200 °C, and 1300 °C in air. The oxidationbehavior of GRX-810 is compared to that of alumina forming single crystal Ni-base superalloys and chromia-forming wrought alloys such as superalloys 718and 625. High resolution atomic-scale characterization and atomistic modelingare employed to explain the exceptional high temperature propertiesobserved in GRX-810, particularly in relation to the unique, finer trigonalyttrium oxides produced during the additive manufacturing process