Extended Data Fig. 9: Optical analysis of creep deformation.
From: A 3D printable alloy designed for extreme environments
a, An optical cross-section of the as-built ODS-ReB sample tested at 1,093 °C / 20 MPa. b, Creep pores/overload cracking along with a Cr-rich nitride in a high plasticity region of the sample. c, A region removed from the fracture surface that reveals creep void formation and lack of nitride formation. d, A representative micrograph of the microstructure in the as-built GRX-810 sample tested at 1,093 °C / 20 MPa that was terminated at 1% strain after 2,800 h. No creep void formation is observed but the presence of Al-rich and Cr-rich nitride phases along grain boundaries can be seen. e, A representative micrograph of the microstructure from the grip section of the same as-built GRX-810 sample revealing that nitrides did not form in an area under no stress. These results suggest that the nitride phases are creep induced.
