Abstract: Disclosed herein are duplex stainless steel alloys comprising 40 wt %-60 wt % ferrite and 60 wt %-40 wt % austenite and methods of formation thereof, the alloys including or consisting essentially of from 10 wt % to 20 wt % chromium (Cr); from 6 wt % to 13 wt % molybdenum (Mo); from 0.5 wt % to 6.5 wt % nickel (Ni); from 2.25 wt % to 12 wt % manganese (Mn); from 0.05 wt % to 5 wt % copper (Cu); from 0.05 wt % to 0.4 wt % nitrogen (N); from 0.05 wt % to 0.35 wt % carbon (C); from 0.01 wt % to 3.5 wt % cobalt (Co); less than 2 wt % silicon (Si); less than 2 wt % tungsten (W); and iron (Fe) balance. The duplex stainless steel alloy may include cast or wrought steel, or it may be in powder form.

Abstract: A nickel base superalloy powder for additive manufacturing applications is disclosed. The alloy powder has the following broad weight percent composition: C ??0-0.1 Mn 0.5 max. Si ??0-0.03 Cr ?4-16 Fe ??0-1.5 Mo 0-6 W 0-8 Co ?0-15 Ti 0-2 Al 0.5-5.5 Nb 0-6 Ta ?7.5-14.5 Hf ??0-2.0 Zr ??0-0.1 Re 0-6 Ru 0-3 B ??0-0.03 The balance of the alloy is at least 50% nickel and the usual impurities. An article of manufacture made from the alloy is also disclosed.

Abstract: A nickel base superalloy powder for additive manufacturing applications is disclosed. The alloy powder has the following broad weight percent composition: C ?0-0.1 Mn 0.5 max. Si ??0-0.03 Cr ?4-16 Fe ?0-1.5 Mo 0-6 W 0-8 Co ?0-15 Ti 0-2 Al 0.5-5.5 Nb 0-6 Ta ?7.5-14.5 Hf ?0-2.0 Zr ?0-0.1 Re 0-6 Ru 0-3 B ??0-0.03 The balance of the alloy is at least 50% nickel and the usual impurities. An article of manufacture made from the alloy is also disclosed.