College of Engineering
Mechanical and Aerospace Engineering
Incorporation of additive manufacturing (AM) as another fabrication tool requires an understanding of the differences in material behavior from traditionally produced materials using casting, powder metallurgical or wrought processing. Since as-built AM parts typically have a rougher surface finish compared to parts subjected to traditional subtractive machining, post-processing methods to obtain a finer surface finish must be developed. This study evaluated the effect of various surface-finishing methods on additively manufactured Inconel 625. Blown powder deposition (BPD) was used to additively build a nominally 1 mm thick plate. After the build, specimens were subjected to: Chemically Accelerated Vibratory Finishing (CAVF), Chemical Milling (CM), and combinations of the two methods. Mechanical testing and microstructural characterization were used to evaluate the effect of the surface finish methods on the material. However, due to inhomogeneity of the as-built microstructure, no correlation could be made between the different surface finishes
Naden, Noah; Puerto, Giancarlo; and Schneider, Judy
"Evaluation of Varying Surface Finishes on Thin-Walled Blown Powder Deposition Inconel 625,"
Perpetua: The UAH Journal of Undergraduate Research: Vol. 4:
1, Article 2.
Available at: https://louis.uah.edu/perpetua/vol4/iss1/2