A superalloy, or high-performance alloy, is an alloy that exhibits excellent mechanical strength and creep resistance at high temperatures, good surface stability, and corrosion and oxidation resistance. Aerospace Quality filler materials available from VBC include an extensive range of Cobalt- Nickel & Iron-base Superalloys together with Titanium, Aluminium, Magnesium, Nickel, Stainless & Structural.
Many of these alloys are used in the precision investment-cast form with single crystal, directional crystal and fine poly crystal structures.
Such materials have to be welded for a number of reasons, including casting defect repair, machining error defects, in-service wear, z-notch hard facing and attaching other fittings. The major problem, however, is the susceptibility to micro fissuring and hot-cracking that these alloys have when welded.
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