October_2021_AMP_Digital

A D V A N C E D M A T E R I A L S & P R O C E S S E S | O C T O B E R 2 0 2 1 3 2 T he July and September issues of the Journal of Materials Engineering and Performance ( JMEP ) were special issues focused on additive manufacturing. The issues were guest edited by WilliamE. Frazier, FASM, PilgrimConsulting LLC and editor of JMEP; Rick Russell, NASA; Yan Lu, NIST; Brandon D. Ribic, America Makes; and Caroline Vail, NSWC Carderock. These highlighted articles were selected by Dr. Frazier to show- case the varied topics covered in the special issues. JMEP is available online at https://link.springer.com/journal/11665/. DEVELOPMENT OF BIOMEDICAL IMPLANTS THROUGH ADDITIVE MANUFACTURING: A REVIEW M. Vignesh, G. Ranjith Kumar, M. Sathishkumar, M. Manikandan, G. Rajyalakshmi, R. Ramanujam, and N. Arivazhagan Additive manufacturing (AM) is an expeditiously developing technolo- gy for the manufacturing of biomedical implants. But there are some issues re- lated to metal AM including desired di- mensional accuracy, preferred surface quality, strength, etc. Based on these shortcomings, the following proper- ties are chosen for this review article: mechanical and metallurgical behav- ior. The main objective is to review the above-stated properties for 3D print- ed biomedical implants manufactured through laser additive manufacturing, friction stir additive manufacturing, paste extruding deposition, and selec- tive laser melting techniques and its fu- ture scope of AM processes. FLAW IDENTIFICATION IN ADDITIVELY MANUFACTURED PARTS USING X-RAY COMPUTED TOMOGRAPHY AND DESTRUCTIVE SERIAL SECTIONING Zackary Snow, Jayme Keist, Griffin Jones, Rachel Reed, Edward Reutzel, and Veeraraghavan Sundar In additive manufacturing, inter- nal flaws that form during processing can have a detrimental impact on the resulting fatigue behavior of the com- ponent. In this study, the authors com- pare XCT scans and automated flaw recognition analysis of the correspond- ing data to results obtained from an au- tomated mechanical polishing-based serial sectioning system. The results point to the need to recognize the lim- itations of XCT and for supplementary XCT scan quality metrics in addition to the voxel size. ADDITIVE MANUFACTURING HIGHLIGHTS IN JMEP DESIGN OF AN INNOVATIVE OXIDE DISPERSION STRENGTHENED AL ALLOY FOR SELECTIVE LASER MELTING TO PRODUCE LIGHTER COMPONENTS FOR THE RAILWAY SECTOR Roberto Sorci, Oriana Tassa, Alessandro Colaneri, Alessandro Astri, Daphne Mirabile, Simon Iwnicki, and Ali Gökhan Demir The railway industry can take ad- vantage of additive manufacturing pro- cesses from several perspectives such as the production of spare parts on demand or the use of lightweight struc- tures for vibration and noise control. Selective laser melting (SLM) is a met- al AM process with industrial maturity where material development can open new prospects for the railway indus- try. In order to respond to such require- ments, this study proposes a framework to study a newmaterial from concept to the processability and finally to the pre- liminary mechanical characterization of alloy for SLM. The results showed that samples produced by SLM were charac- terized by > 1% porosity. Compared to the reference Al alloy, an increase up to 20% in microhardness was achieved for ODS samples made by the SLM process. Frazier