The effects of Mo, Cr, Fe, Si, and Mn on the strength of nickel-base alloys at 25 and 650℃ were studied. The strength at 25℃ was enhanced by Mo and Cr but not significantly affected by Fe, Si, and Mn in the concentrations studied. At 650℃ the yield stress and the creep strength were improved by additions of Mo, Cr, and Si, while Fe and Mn had no measurable effect. These changes are thought to be a result primarily of solid-solution hardening, although Mo, Cr, and Si influence the type of carbide that is formed.
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