Orientation effect of electropolishing characteristics of 316L stainless steel fabricated by laser powder bed fusion

Wei Han1, Fengzhou Fang1
1Centre of Micro/Nano Manufacturing Technology (MNMT-Dublin), University College Dublin, Dublin 4, Ireland

Tóm tắt

Abstract

3D metal printing process has attracted increasing attention in recent years due to advantages, such as flexibility and rapid prototyping. This study aims to investigate the orientation effect of electropolishing characteristics on different surfaces of 316L stainless steel fabricated by laser powder bed fusion (L-PBF), considering that the rough surface of 3D printed parts is a key factor limiting its applications in the industry. The electropolishing characteristics on the different surfaces corresponding to the building orientation in selective laser melting are studied. Experimental results show that electrolyte temperature has critical importance on the electropolishing, especially for the vertical direction to the layering plane. The finish of electropolished surfaces is affected by the defects generated during L-PBF process. Thus, the electropolished vertical surface has higher surface roughness Sa than the horizontal surface. The X-ray photoelectron spectroscopy spectra show that the electropolished horizontal surface has higher Cr/Fe element ratio than the vertical surface. The electropolished horizontal surface presents higher corrosion resistance than the vertical surface by measuring the anodic polarization curves and fitting the equivalent circuit of experimental electrochemical impedance spectroscopy.

Từ khóa


Tài liệu tham khảo

Han W, Fang F Z. Two-step electropolishing of 316L stainless steel in a sulfuric acid-free electrolyte. Journal of Materials Processing Technology, 2020, 279: 116558

Yang X, Yang X, Sun R, et al. Obtaining atomically smooth 4H-SiC (0001) surface by controlling balance between anodizing and polishing in electrochemical mechanical polishing. Nanomanufacturing and Metrology, 2019, 2(3): 140–147

Han W, Fang F Z. Fundamental aspects and recent developments in electropolishing. International Journal of Machine Tools and Manufacture, 2019, 139: 1–23

Fang F Z. On atomic and close-to-atomic scale manufacturing-development trend of manufacturing technology. Chinese Mechanical Engineering, 2020, 31(9): 1009–1021 (in Chinese)

Wang X, Han L, Geng Y, et al. The simulation and research of etching function based on scanning electrochemical microscopy. Nanomanufacturing and Metrology, 2019, 2(3): 160–167

Mathew P T, Rodriguez B J, Fang F Z. Atomic and close-to-atomic scale manufacturing: A review on atomic layer removal methods using atomic force microscopy. Nanomanufacturing and Metrology, 2020, 3(3): 167–186

Benedetti M, Torresani E, Leoni M, et al. The effect of post-sintering treatments on the fatigue and biological behavior of Ti-6Al-4V ELI parts made by selective laser melting. Journal of the Mechanical Behavior of Biomedical Materials, 2017, 71: 295–306

Alrbaey K, Wimpenny D I, Al-Barzinjy A A, et al. Electropolishing of re-melted SLM stainless steel 316L parts using deep eutectic solvents: 3 × 3 full factorial design. Journal of Materials Engineering and Performance, 2016, 25(7): 2836–2846

Mingear J, Zhang B, Hartl D, et al. Effect of process parameters and electropolishing on the surface roughness of interior channels in additively manufactured nickel-titanium shape memory alloy actuators. Additive Manufacturing, 2019, 27: 565–575

Simson T, Emmel A, Dwars A, et al. Residual stress measurements on AISI 316L samples manufactured by selective laser melting. Additive Manufacturing, 2017, 17: 183–189

Riemer A, Leuders S, Thöne M, et al. On the fatigue crack growth behavior in 316L stainless steel manufactured by selective laser melting. Engineering Fracture Mechanics, 2014, 120: 15–25

Lyczkowska-Widlak E, Lochynski P, Nawrat G, et al. Comparison of electropolished 316L steel samples manufactured by SLM and traditional technology. Rapid Prototyping Journal, 2019, 25(3): 566–580

Zhang B, Lee X, Bai J, et al. Study of selective laser melting (SLM) Inconel 718 part surface improvement by electrochemical polishing. Materials & Design, 2017, 116: 531–537

Urlea V, Brailovski V. Electropolishing and electropolishing-related allowances for powder bed selectively laser-melted Ti-6Al-4V alloy components. Journal of Materials Processing Technology, 2017, 242:1–11

Urlea V, Brailovski V. Electropolishing and electropolishing-related allowances for IN625 alloy components fabricated by laser powder-bed fusion. International Journal of Advanced Manufacturing Technology, 2017, 92(9–12): 4487–4499

Mercelis P, Kruth J P. Residual stresses in selective laser sintering and selective laser melting. Rapid Prototyping Journal, 2006, 12(5): 254–265

Monroy K, Delgado J, Ciurana J. Study of the pore formation on CoCrMo alloys by selective laser melting manufacturing process. Procedia Engineering, 2013, 63: 361–369

Leuders S, Thöne M, Riemer A, et al. On the mechanical behaviour of titanium alloy TiAl6V4 manufactured by selective laser melting: Fatigue resistance and crack growth performance. International Journal of Fatigue, 2013, 48: 300–307

Mertens A, Reginster S, Contrepois Q, et al. Microstructures and mechanical properties of stainless steel AISI 316L processed by selective laser melting. Materials Science Forum, 2014, 783–786: 898–903

Alsalla H H, Smith C, Hao L. Effect of build orientation on the surface quality, microstructure and mechanical properties of selective laser melting 316L stainless steel. Rapid Prototyping Journal, 2018, 24(1): 9–17

Kong D, Ni X, Dong C, et al. Anisotropy in the microstructure and mechanical property for the bulk and porous 316L stainless steel fabricated via selective laser melting. Materials Letters, 2019, 235: 1–5

Ahmadi A, Mirzaeifar R, Moghaddam N S, et al. Effect of manufacturing parameters on mechanical properties of 316L stainless steel parts fabricated by selective laser melting: A computational framework. Materials & Design, 2016, 112: 328–338

Ni X Q, Kong D C, Wen Y, et al. Anisotropy in mechanical properties and corrosion resistance of 316L stainless steel fabricated by selective laser melting. International Journal of Minerals Metallurgy and Materials, 2019, 26(3): 319–328

Gong H, Rafi K, Gu H, et al. Analysis of defect generation in Ti-6Al-4V parts made using powder bed fusion additive manufacturing processes. Additive Manufacturing, 2014, 1–4: 87–98

Bruna-Rosso C, Demir A G, Previtali B. Selective laser melting finite element modeling: Validation with high-speed imaging and lack of fusion defects prediction. Materials & Design, 2018, 156: 143–153

King W E, Barth H D, Castillo V M, et al. Observation of keyholemode laser melting in laser powder-bed fusion additive manufacturing. Journal of Materials Processing Technology, 2014, 214(12): 2915–2925

Bayat M, Thanki A, Mohanty S, et al. Keyhole-induced porosities in laser-based powder bed fusion (L-PBF) of Ti6Al4V: High-fidelity modelling and experimental validation. Additive Manufacturing, 2019, 30: 100835

Shang Y, Yuan Y, Li D, et al. Effects of scanning speed on in vitro biocompatibility of 316L stainless steel parts elaborated by selective laser melting. International Journal of Advanced Manufacturing Technology, 2017, 92(9–12): 4379–4385

Ni X Q, Kong D C, Wu W, et al. Corrosion behavior of 316L stainless steel fabricated by selective laser melting under different scanning speeds. Journal of Materials Engineering and Performance, 2018, 27(7): 3667–3677

Kong D, Ni X, Dong C, et al. Bio-functional and anti-corrosive 3D printing 316L stainless steel fabricated by selective laser melting. Materials & Design, 2018, 152: 88–101

Wen S, Li S, Wei Q, et al. Effect of molten pool boundaries on the mechanical properties of selective laser melting parts. Journal of Materials Processing Technology, 2014, 214(11): 2660–2667

Shayesteh Moghaddam N, Saghaian S E, Amerinatanzi A, et al. Anisotropic tensile and actuation properties of NiTi fabricated with selective laser melting. Materials Science and Engineering A, 2018, 724: 220–230

Kong D, Dong C, Ni X, et al. Mechanical properties and corrosion behavior of selective laser melted 316L stainless steel after different heat treatment processes. Journal of Materials Science and Technology, 2019, 35(7): 1499–1507

Ni X, Kong D, Wu W, et al. Corrosion behavior of 316L stainless steel fabricated by selective laser melting under different scanning speeds. Journal of Materials Engineering and Performance, 2018, 27(7): 3667–3677

Han W, Fang F Z. Electropolishing of 316L stainless steel using sulfuric acid-free electrolyte. Journal of Manufacturing Science and Engineering, 2019, 141(10): 101015

Zhang B, Li Y, Bai Q. Defect formation mechanisms in selective laser melting: A review. Chinese Journal of Mechanical Engineering, 2017, 30(3): 515–527

Sola A, Nouri A. Microstructural porosity in additive manufacturing: The formation and detection of pores in metal parts fabricated by powder bed fusion. Journal of Advanced Manufacturing and Processing, 2019, 1(3): e10021

Liverani E, Toschi S, Ceschini L, et al. Effect of selective laser melting (SLM) process parameters on microstructure and mechanical properties of 316L austenitic stainless steel. Journal of Materials Processing Technology, 2017, 249: 255–263

Kuo C N, Chua C K, Peng P C, et al. Microstructure evolution and mechanical property response via 3D printing parameter development of Al-Sc alloy. Virtual and Physical Prototyping, 2020, 15(1): 120–129

Nie X, Chen Z, Qi Y, et al. Effect of defocusing distance on laser powder bed fusion of high strength Al-Cu-Mg-Mn alloy. Virtual and Physical Prototyping, 2020, 15(3): 325–339

Kimbrough D E, Cohen Y, Winer A M, et al. A critical assessment of chromium in the environment. Critical Reviews in Environmental Science and Technology, 1999, 29(1): 1–46

Lee S J, Lai J J. The effects of electropolishing (EP) process parameters on corrosion resistance of 316L stainless steel. Journal of Materials Processing Technology, 2003, 140(1–3): 206–210

Luo H, Su H, Dong C, et al. Passivation and electrochemical behavior of 316L stainless steel in chlorinated simulated concrete pore solution. Applied Surface Science, 2017, 400: 38–48

Laleh M, Hughes A E, Yang S, et al. Two and three-dimensional characterisation of localised corrosion affected by lack-of-fusion pores in 316L stainless steel produced by selective laser melting. Corrosion Science, 2020, 165: 108394

Schaller R F, Mishra A, Rodelas J M, et al. The role of microstructure and surface finish on the corrosion of selective laser melted 304L. Journal of the Electrochemical Society, 2018, 165(5): C234–C242

Jorcin J B, Orazem M E, Pébère N, et al. CPE analysis by local electrochemical impedance spectroscopy. Electrochimica Acta, 2006, 51(8–9): 1473–1479

Shahryari A, Omanovic S, Szpunar J A. Electrochemical formation of highly pitting resistant passive films on a biomedical grade 316LVM stainless steel surface. Materials Science and Engineering C, 2008, 28(1): 94–106

Habibzadeh S, Li L, Shum-Tim D, et al. Electrochemical polishing as a 316L stainless steel surface treatment method: Towards the improvement of biocompatibility. Corrosion Science, 2014, 87: 89–100

Han W, Fang F Z. Eco-friendly NaCl-based electrolyte for electropolishing 316L stainless steel. Journal of Manufacturing Processes, 2020, 58: 1257–1269