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Tribocorrosion Behavior of Inconel 718 Fabricated by Laser Powder Bed Fusion-Based Additive Manufacturing

机译：由激光粉末融合的添加剂制造制造的Inconel 718的Tribocorion行为

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Additive manufacturing (AM) by laser powder bed fusion (LPBF) has gained significant research attention to fabricate complex 3D Inconel alloy components for jet engines. The strategic advantages of LPBF-based AM to fabricate jet components for aerospace applications are well reported. The jet components are exposed to a high degree of vibration during the jet operation in a variable aqueous environment. The combined vibration and the aqueous environment create a tribological condition that can accelerate the failure mechanism. Therefore, it is critical to understand the tribocorrosion behavior of the Inconel alloy. In the present work, tribocorrosion behavior of the LPBF fabricated standalone coating of Inconel 718 in the 3.5% NaCl aqueous solution is presented. The LPBF fabricated samples are analyzed to determine the impact of porosity, generated as a result of LPBF, on the triobocorrosion behavior of AM Inconel 718. The study includes potentiodynamic tests, cathodic polarization, along with OCP measurements. The corrosive environment is found to increase the wear by 29.24% and 49.5% without the initiation of corrosion in the case of AM and wrought Inconel 718, respectively. A corrosion accelerated wear form of tribocorrosion is observed for Inconel 718. Additionally, the corrosive environment has a significant effect on wear even when the Inconel 718 surface is in equilibrium potential with the corrosive environment and no corrosion potential scan is applied. This study provides an insight into a critical aspect of the AM Inconel components.
机译：通过激光粉床融合（LPBF）的添加剂制造（AM）已经提高了对喷射发动机的复杂3D Inconel合金组分的显着研究。报道了基于LPBF的AM用于制造用于航空航天应用的喷射部件的战略优势。在可变含水环境下喷射操作期间，喷射部件暴露于高振动程度。组合振动和含水环境造成了可以加速失效机制的摩擦学条件。因此，了解Inconel合金的Tribocorlion行为至关重要。在本作中，介绍了3.5％NaCl水溶液中的LPBF制造的LPBF的独立涂层的Tribocolion行为。分析LPBF制造的样品以确定LPBF产生的孔隙率的影响，在AM Inconel 718的三种侵略性行为上。该研究包括电位测试，阴极偏振以及OCP测量。发现腐蚀性环境将磨损增加29.24％和49.5％，而不会分别在AM和锻造Inconel 718的情况下启动腐蚀。对于Inconel 718，观察到腐蚀加速磨损形式的Tribocorosion。另外，即使当Inconel 718表面与腐蚀环境的平衡电位处于平衡电位并且不应用腐蚀电位扫描，腐蚀环境也会对磨损具有显着影响。本研究提供了对AM Inconel组件的关键方面的洞察力。

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