Physical metallurgy of nickel—molybdenum alloys

AbstractThe physical metallurgy of Ni -rich Ni–Mo alloys is reviewed. Three ordered intermetallic compounds can form in this system, which leads to some intriguing microstructures and has significant effects on properties. The understanding of the nature of these phases, how they are formed, and the factors responsible for property changes are summarized; areas needing further research are indicated. The phase relations and transformations in alloys containing approximately 20 at. -%Mo with Fe additions are reviewed, as these serve as the basis for some commercial alloys. The structures and properties of the commercial alloys are also reviewed.