GRINDING OF ADDITIVELY MANUFACTURED AEROSPACE ALLOYS: Intertech 2019 - Paper #1940

摘要

Additive manufacturing of components in the aerospace industry are being pursued by a number of different organizations. As the part families expand both in type and volume, there is a growing need to modify the surfaces of these parts to meet the final application requirements in a cost-effective manner. Some of these manufactured components have a simple geometry and some are very complex. Since the additive process produces components in near-net shape, there is often very little stock that remains on these components for providing final finish. Therefore, any post-processing finishing methods that are employed need to be extremely consistent in achieving part tolerances and surface quality. This paper demonstrates the results from a finish grinding study conducted on additively manufactured nickel-based superalloy (IN718) and titanium alloy (Ti64) specimens that are used for various applications in the aerospace industry. Results include grinding process performance measures such as power, material removal rates, grinding forces as well as 3-D surface finish maps, and metallurgical analysis data of the ground specimens.