Development of a NiCoCrMo0.2 medium-entropy alloy via laser additive manufacturing for application in agitator blades of acid reactors
Source abstract
Abstract
To enhance the service life of agitator blades in phosphoric acid reactors, the NiCoCrMo 0.2 medium-entropy alloy (Mo 0.2 MEA) was designed using the cluster-plus-glue-atom model. The microstructure and erosion resistance of Mo 0.2 MEA were analyzed, revealing a composition of FCC solid-solution dendrites with small μ phases. Mo 0.2 MEA exhibits a higher microhardness (256.4 HV 0.2 ) compared to its Mo-free counterpart. Additionally, the lowest I corr value and largest impedance radius indicate superior corrosion resistance relative to 904L steel, attributed to a dense and stable passive film of MoO 3 and Cr 2 O 3 . The erosion resistance of Mo 0.2 MEA, assessed by cumulative mass loss, is double that of 904L stainless steel. Furthermore, the Stacking-fault energy of Mo 0 MEA (∼−105.7 mJ/m 2 ) is lower than that of Mo 0.2 MEA (∼−85.91 mJ/m 2 ) and 904L (∼251.2 mJ/m 2 ), suggesting greater plastic deformation capability in Mo 0 MEA. These findings offer a new approach for developing anti-erosion medium-entropy alloys through high-entropy alloying and laser additive manufacturing, guided by the cluster-plus-glue-atom model.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: High Entropy Alloys Studies · High-Temperature Coating Behaviors · Additive Manufacturing Materials and Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (100+)
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