A novel finishing approach for 3D printed inconel 718 by utilizing isotropic electrochemical etching

Ajmal，Khan Muhammad; Yi，Rong; Zhan，Zejin; Ji，Jianwei; Zhang，Linfeng; Deng，Hui

2022

10.1016/j.jmatprotec.2021.117356

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY   影响因子和分区

0924-0136

1873-4774

In this study, a novel and highly efficient isotropic etching polishing (IEP) technique electrochemically polished flat and complex 3D printed Inconel 718 (IN718) parts. The anisotropic etching was transformed into isotropic etching based on the electrolyte diffusion characteristics, and the latter was also realized as the polishing mechanism of 3D printed IN718. Wet etching revealed inhomogeneous microstructures in 3D printed IN718, which dissolved preferentially when polished for a longer duration. The initial surface roughness of 674 nm was reduced to 31.5 nm, and a maximum of 2.42 mm/min material removal rate (MRR) was achieved that varied with IEP parameters. The IEP improved the corrosion resistance of 3D printed IN718 compared to the original and grounded substrates, but it was limited by the processing time. Contrarily, the surface mechanical properties of 3D printed IN718 were slightly degraded after IEP. Finally, the 3D printed IN718 complex parts were polished for 5 min, and the Sa roughness was reduced by 76 %, demonstrating a huge potential of IEP as a contemporary industrial polishing technique.

Additive manufacturing Electrochemical Inconel 718 Isotropic etching polishing Mechanical properties Surface roughness

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China["52035009","52005243"] ; research fund for Inter-national Cooperation[GJHZ20180928155412525] ; Shenzhen High-level Innovation and Entrepreneurship Fund from the Science and Technology Innovation Committee of Shenzhen Municipality, Shenzhen, China[KQTD20170810110250357]

Engineering ; Materials Science

Engineering, Industrial ; Engineering, Manufacturing ; Materials Science, Multidisciplinary

WOS:000706415000001

ELSEVIER SCIENCE SA

20213610866482

3D printers ; Anisotropy ; Corrosion resistance ; Electrolytes ; Polishing ; Wet etching

Metals Corrosion:539.1 ; Machining Operations:604.2 ; Electric Batteries and Fuel Cells:702 ; Printing Equipment:745.1.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Physical Properties of Gases, Liquids and Solids:931.2

MATERIALS SCIENCE

2-s2.0-85114180699

Scopus

Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,No. 1088, Xueyuan Road,518055,China

Ajmal，Khan Muhammad,Yi，Rong,Zhan，Zejin,et al. A novel finishing approach for 3D printed inconel 718 by utilizing isotropic electrochemical etching[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,2022,299.

Ajmal，Khan Muhammad,Yi，Rong,Zhan，Zejin,Ji，Jianwei,Zhang，Linfeng,&Deng，Hui.(2022).A novel finishing approach for 3D printed inconel 718 by utilizing isotropic electrochemical etching.JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,299.

Ajmal，Khan Muhammad,et al."A novel finishing approach for 3D printed inconel 718 by utilizing isotropic electrochemical etching".JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 299(2022).