EVALUATION OF INCONEL 718, AGE HARDENABLE NICKEL-CHROMIUM

摘要

Tests were conducted to investigate fabrication characteristics of 048 inch and .250 inch thick income 718. Evaluations wars made la the following areas: Formability Brake Forming, Uniform Elongation in sight inches, and Guerin and Impact Rubber Forming, and Dimple Forming); Resistance Welding, Fusion Butt Welding, and TIG Spot Welding. Room temperature tensile tests revealed that the mechanical prop arties were typical for the alloy. Total elongation and uniform elongation tests indicated good form ability characteristics of the alloy in the annealed condition. A minimum bend radius of.031 inch was attained when bending specimens perpendicular to the rolling direction; a.047 inch minimum bend radius was obtained when specimens- were bent parallel to the rolling direction.nGuerin Rubber Forming and Impact Rubber Forming airbeds were used to form 048 inch specimens on a stretch flange radius of 6.05 inches and a shrink flange radius of 9-95 inches. The specimens were formed around a .090 inch bend radius. Various flange lengths were formed to determine the amount of flange distortion that would result from each configuration. Both forming methods resulted in formed parts with approximately production tolerances.