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The Anisotropic Electrochemical Machinability of Laser Cladding Deposited Ti6Al4V Alloy in NaCl Solution |
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| Authors: | Jiaqiang Li Yuan Yang Gangxian Zhu Chengfeng Sun Yiyang Chen Kejun Wang Shihong Shi |
| Affiliation: | 1.School of Mechanical and Electric Engineering, Soochow University, Suzhou 215021, China; (J.L.); (G.Z.); (C.S.); (S.S.);2.Advanced Manufacturing Technology Research Center, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong;3.Suzhou Electromachining Machine Tool Research Institute Co., Ltd., Suzhou 215011, China; |
| Abstract: | The hybrid manufacturing method of laser cladding deposition (LCD) additive manufacturing and electrochemical machining (ECM) is a promising approach to advanced manufacturing technology for difficult machined materials. The anisotropic electrochemical performance of LCD-produced Ti6Al4V alloy was studied in 15 wt.% NaCl solution by polarization curve measurements and ECM tests. The horizontal-plane (X0Y plane) exhibits a more stable passive film in both static electrolyte and low current density ECM processes than the vertical-plane (X0Z plane). Additionally, the horizontal-plane exhibits a higher material removal rate and more consistent dissolved surface roughness in comparison with the vertical-plane during the high current density ECM process. The microstructure of the LCD-produced Ti6Al4V alloy on the horizontal-plane consisted of equiaxed-like prior-β grains and slightly finer α-laths but was composed by columnar prior-β grains and coarser α-laths on the vertical-plane. These differences in the microstructural characteristics produce the distinctions observed in the electrochemical dissolution behavior and electrochemical machinability on the horizontal- and vertical-planes. |
| Keywords: | additive manufacturing laser cladding deposition electrochemical machining anodic dissolution titanium alloy |