LAUSR

Oxide dispersion strengthened (ODS) alloys are desirable for high temperature applications, as dispersed oxide particles within the metal matrix act as barriers to dislocation motion and grain growth at elevated temperatures. Traditional processing routes for ODS alloys are powder metallurgy based, utilizing mechanical alloying by high energy ball milling to mix metal and oxide powders, necessitating compaction techniques such as hot isostatic pressing or hot extrusion to create a dense final product. Recent studies have investigated production of dispersion strengthened alloys without powder metallurgy by introducing a dispersed ceramic phase to a bulk alloy via a physical application process, such as spraying [1], followed by severe plastic deformation to refine grain size. This study proposes an ODS synthesis method of introducing oxides via selective internal oxidation, followed by equal channel angular pressing (ECAP) to refine grain size.