Improving the Mechanical and Electrochemical Performance of Additively Manufactured 8620 Low Alloy Steel via Boriding

Sabuz, Ezazul Haque; Noor-A-Alam, Mohammed; Haider, Waseem; Shabib, Ishraq

doi:10.3390/cmd4040032

Cited by 4 publications

(1 citation statement)

References 80 publications

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“…The microstructure of the SLMed 8620 did not have uniform grains and varied in size and orientation, which can be attributed to the elevated cooling rate inducing non-equilibrium solidification conditions [60]. The microstructure mainly consisted of martensite caused by the higher solidification rate, which did not allow the melted powder to transform from austenite to BCC (body-centered cubic) ferrite [61,62]. The presence of some white streaks was observed in the side view of the SLMed specimen as shown in Figure 3d.…”

Section: Microstructurementioning

confidence: 99%

Enhanced Corrosion Resistance of TiZrN-Coated Additively Manufactured 8620 Low-Alloy Steel in Nitrate Salt Solution and Salt Bath

Sabuz,

Maruf,

Haider

et al. 2023

Coatings

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In this study, corrosion resistance of TiZrN-coated additively manufactured (3D-printed) 8620 steel has been separately studied in a 60–40 wt% NaNO3 + KNO3 molten salt and in an aqueous nitrate salt environment. Microstructural characterization of the as-built bare 3D-printed 8620 sample revealed martensitic microstructures. High-temperature corrosion analysis in molten nitrate salt revealed improved film stability and corrosion resistance of the coating. The coated 3D-printed sample showed no scale of corrosion products, whereas the bare 3D-printed sample exhibited a layer of corrosion products of 2.62 ± 0.24 µm thickness. Potentiodynamic polarization and electrochemical impedance spectroscopy tests in aqueous nitrate salts at room temperature exhibited an ~8-fold decrease in corrosion current density and a ~7-fold increase in charge transfer resistance, indicating enhanced corrosion resistance of the coated 8620. The coated wrought 8620 showed comparable corrosion resistance to that of the coated 3D-printed sample. However, in aqueous solution, the bare 3D-printed sample exhibited localized corrosion, whereas the bare wrought revealed uniform corrosion on the surface.

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Section: Microstructurementioning

confidence: 99%

Enhanced Corrosion Resistance of TiZrN-Coated Additively Manufactured 8620 Low-Alloy Steel in Nitrate Salt Solution and Salt Bath

Sabuz,

Maruf,

Haider

et al. 2023

Coatings

Self Cite

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Electrochemical behaviour of tungsten nitride thin film in phosphate buffer saline solution for application in bioelectronics

Sabuz,

Maruf,

Haider

et al. 2024

Canadian Metallurgical Quarterly

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Modification and characterization of the surface of AISI 8620 steel by C-TIGA and P-TIGA processes in one pass

Kumar,

Dev

2024

Proceedings of the Institution of Mechanical Engineers, Part E:

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This research investigates the effects of continuous tungsten inert gas arcing (C-TIGA) and pulsed tungsten inert gas arcing (P-TIGA) processes on the hardness of case-hardenable low-alloy steels, focusing on AISI 8620 steel. The study investigates the influence of arc parameters on mechanical properties and microstructural changes. The modified surface of AISI 8620 steel was investigated analytically and validated through experiments. Using an 18 mm thick AISI 8620 steel plate, C-TIGA and P-TIGA processes are employed in one pass with subsequent hardness measurements in the fusion zone and heat-affected zone (HAZ). The results show a remarkable improvement in the hardness of the modified zone compared to the base metal, with a noteworthy increase of 127 ± 20% and 77 ± 25% for C-TIGA and P-TIGA processes, respectively. Notably, at equivalent arc currents, P-TIGA outperforms C-TIGA, achieving a hardness increase of over 20 ± 10% in the modified zone. In addition, the careful control of process parameters in P-TIGA leads to a better change in the thermal and mechanical properties of rolling bearing steel compared to C-TIGA. The combination of significantly increased surface hardness and an extensively modified zone depth contributes to increased wear resistance and compressive stresses in the matrix. In particular, the P-TIGA process is shown to be superior as it has greater modified zone depth, narrower HAZ width, and higher hardness. This research establishes P-TIGA as a promising method for surface modification and offers significant improvements over the traditional C-TIGA method.

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Improving the Mechanical and Electrochemical Performance of Additively Manufactured 8620 Low Alloy Steel via Boriding

Cited by 4 publications

References 80 publications

Enhanced Corrosion Resistance of TiZrN-Coated Additively Manufactured 8620 Low-Alloy Steel in Nitrate Salt Solution and Salt Bath

Enhanced Corrosion Resistance of TiZrN-Coated Additively Manufactured 8620 Low-Alloy Steel in Nitrate Salt Solution and Salt Bath

Electrochemical behaviour of tungsten nitride thin film in phosphate buffer saline solution for application in bioelectronics

Modification and characterization of the surface of AISI 8620 steel by C-TIGA and P-TIGA processes in one pass

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