The electrochemical response of laser powder bed additively manufactured Ti6Al4V is often considered at room-temperature conditions; however, structural Ti6Al4V components in a warm marine environment tend to respond differently. In light of this, the present work investigates the electrochemical response of the Ti6Al4V fabricated using laser powder bed fusion, in aqueous NaCl solution at varying temperatures (20, 35, and 50 $$^\circ$$ C). The potentiodynamic polarization and electrochemical impedance measurement also detected the spatial variation of corrosion resistance that was rationalized using a finite-element model which indicated spatially varying thermokinetics. The pitting potential of additively manufactured Ti6Al4V was reduced significantly at 50 $$^\circ$$ C (43.08 $$\%$$ ). The possible pitting mechanism and its thermally influenced activity were realized through the X-ray photoelectron spectroscopy. The microstructural analysis revealed the surface morphology variation within the pit region, which was correlated to the varying energy level associated with grain orientation and phases present in it.

中文翻译：

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激光粉末床增材制造 Ti6Al4V 对水性电解质温度变化的空间响应

激光粉末床增材制造 Ti6Al4V 的电化学响应通常被考虑在室温条件下；然而，温暖海洋环境中的结构性 Ti6Al4V 组件往往会有不同的响应。鉴于此，本工作研究了使用激光粉末床融合制造的 Ti6Al4V 在不同温度（20、35 和 50 $$^\circ$$ C）的 NaCl 水溶液中的电化学响应。动电位极化和电化学阻抗测量还检测到耐腐蚀性的空间变化，使用有限元模型将其合理化，该模型指示空间变化的热动力学。增材制造的 Ti6Al4V 的点蚀电位在 50 $$^\circ$$ C (43.08 $$\%$$ ) 时显着降低。可能的点蚀机制及其热影响活性是通过 X 射线光电子能谱实现的。微观结构分析揭示了凹坑区域内的表面形态变化，这与与晶粒取向和其中存在的相相关的不同能级相关。