Manufacture and property evaluation of super alloy 44Ni-14Cr-1.8Nb-1.7Ti-1.5Mo-0.3V-Fe (modified 706): an experience

The alloy 44Ni-14Cr-2.6Nb-1.7Ti-1.5Mo-0.3V-Fe is derived from the family of super alloys 706 and 718 compositions. It is a precipitation hardenable alloy with its primary constituents consisting of Niobium and Titanium. A balanced content of Nickel, Chromium and Aluminium in alloy 706 provides good hardenability and resistance against oxidation and corrosion. Further modified 706 with Molybdenum and Vanadium improve its high temperature capabilities. Modified 706 displays excellent mechanical properties in combination with good fabricability compared to structurally complex 718. This alloy finds application in aerospace field requiring high strength and ease of fabrication. The present paper describes the manufacturing practice adopted and presents mechanical properties evaluated on various products. (AU) © 2010 by The Materials, Metals, & Materials Society. All rights reserved.