Fabricating process for high strength, low ductility nickel base alloys

Abstract From the Canadian patent

The present invention provides an improved process for fabricating shaped articles from high strength low, ductility nickel base alloys, especially modified IN100. According to the process the alloy in prealloyed, powdered form is hot isostatically pressed to provide a homogeneous, solid billet. The pressed low ductility, billet is then isothermally forged to shape in hot dies in a single forging pass which includes an initial slow strain rate stage to effect a minor reduction in thickness sufficient to refine the alloy grain structure and place the billet in a temporary condition of low strength and high ductility followed by a high strain rate stage for effecting a major reduction in …