Comparative Analysis of Properties and Microstructure of the Plastically Deformed Alloy Inconel®718, Manufactured by Plastic Working and Direct Metal Laser Sintering

Abstract

Nickel superalloys as Inconel® are materials widely used in the aerospace industry among others for diffusers, combustion chamber, shells of gas generators and other. In most cases, manufacturing process of those parts are used metal strips, produced by conventional plastic processing techniques, and thus by hot or cold rolling. An alternative technology allowing for manufacturing components for jet engines is the technique of 3D printing (additive manufacturing), and most of all Direct Metal Laser Sintering, which is one of the latest achievement in field of additive technologies. The paper presents a comparative analysis of the microstructure and mechanical properties of the alloy Inconel®718 manufactured by plastic working and Direct Metal Laser Sintering technology, in the initial state, after deformation and after heat treatment.

Microstructure and Mechanical Properties of Solid-State Rotary Friction Welded Inconel 713C and 32CrMo4 Steel Joints Used in a Turbocharger Rotor

“…Ni-based superalloys are a wide group of materials subjected to friction welding. There are two broad categories of nickel alloys: precipitation-hardened alloys and solid-solution-strengthened alloys [ 31 , 32 ]. Nickel alloys in both categories can be welded using common processes [ 33 ].…”

Distinction in Anodic Dissolution Behavior of Inconel 718 Prepared by Different Forming Technologies

“…[21][22][23][24] Recently, Dai et al 25 reported that the laser additive manufacturing (LAM)-fabricated Ti-6Al-4V has worse corrosion resistance (refers to anodic dissolution rate at low current densities) than the commercial Grade 5 alloy owing to the larger amount of acicular martensite and less β-Ti, which shed light on the anodic behavior distinctions of Ti-6Al-4V alloy fabricated by LAM and other methods. Analogously, owing to the different microstructural features of Inconel 718 produced by LSF and forging methods (as proved by References 26,27), it is reasonable to believe that their anodic dissolution behaviors are different. Considering that the microstructural features play a significant role in the processing results of ECM, it is necessary to investigate the anodic dissolution behaviors of the LSF-produced and wrought Inconel 718.…”