Remanufacturing and analysis of defective parts using 3D metal printing

• Main Author: Muhamad, Syamimi
• Format: Thesis
• Language: English; English
• Published: 2024
• Online Access: http://eprints.utem.edu.my/id/eprint/27637/1/Remanufacturing%20and%20analysis%20of%20defective%20parts%20using%203D%20metal%20printing.pdf; http://eprints.utem.edu.my/id/eprint/27637/2/Remanufacturing%20and%20analysis%20of%20defective%20parts%20using%203D%20metal%20printing.pdf; http://eprints.utem.edu.my/id/eprint/27637/; https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=123536

Metal 3D printing offers a huge potential to diverse industries, such as construction, aerospace, biomedical, and machining. This method is known to reduce material consumption and wastage. Integration of reverse engineering and metal 3D printing offers faster and cheaper production with unlimited part sizes. One of the applications of metal 3D printing is for part manufacturing. This thesis aims to remanufacture the defective parts using wire arc additive manufacturing (WAAM) with Cold Metal Transfer Technology (CMT) as the heat source. In this study, the damaged parts are components used in automated machines for metal fabrication. The part was restored and repaired as new parts using WAAM and reusable. The defective part usually cannot be supplied to the factories, which wastes the metal and costs operation for the company. This study demonstrates the use of WAAM to repair the damaged parts. The two specimens of dog bone remanufacturing using WAAM with different direction deposition were observed. The microhardness of damaged parts was tested before and after repair. The composition of the damaged part and wire was identified. The result shows the horizontal direction deposition dog bone has higher force, tensile strength, elasticity, and yield strength than the vertical dog bone. However, the elongation of vertical dog bones is higher than horizontal. The initial crack during the tensile test of horizontal dog bone is at the middle of the gauge length, while the vertical dog bone is at the bottom. After repairing the damaged part, the microhardness test decreased from 398.828 Hv to 350.288 Hv.