Delta Phase in INCONEL 718: Mechanical Properties and Forging Process Requirements
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To fullfill the Inconel 718 requirements, it is necessary to understand the influence of delta phase on microstructure evolution and on mechanical resistance. Therefore three comprehensive studies have been carried out: a validated delta phase characterization methodology, of the ' effects of (con~entr/emvology) on mecmhaa?cal properties: delta phase delta content affects yield strength and both content and morphology affect creep rupture properties, a validated delta solutionning model predicting content evolution and a study pointing out the parameters of delta particles pinning the grain boundary. Superalloys 718,625,706 and Various Derivatives Edited by B.A. Loria The Minerals, Metals&Materials Society, 1994