Microstructure Evolution Mechanism and Corrosion Resistance of FeCrNi(AlTi)x Medium Entropy Alloy Prepared by Laser Melting Deposition with Al and Ti Content Changes
Source abstract
Abstract
In order to improve the microstructure and corrosion resistance of entropy alloy in the FeCrNi system, laser melting deposition technology was used as a preparation method to study the effects of different contents of Al and Ti on the microstructure and corrosion resistance of entropy alloy in FeCrNi(AlTi)x (x = 0.17, 0.2, and 0.24). The results show that the addition of Al and Ti elements can change the phase structure of the alloy from a single FCC phase structure to an FCC + BCC biphase structure. The BCC phase volume fraction of FeCrNi(AlTi)0.2 is the highest among the three alloys, reaching 37.5%. With the addition of Al and Ti content, the grain of the alloy will be refined to a certain extent. In addition, the dual-phase structure will also improve the corrosion resistance of the alloy. In 3.5 wt.% NaCl solution, the increase of Al and Ti content can effectively improve the protection of the passivation film on the surface of the entropy alloy in FeCrNi(AlTi)x, effectively inhibit the large-scale corrosion phenomenon on the alloy surface, and thus improve the corrosion resistance of the alloy. In a certain range, increasing the content of Al and Ti elements in the FeCrNi(AlTi)x system can improve the corrosion resistance of the alloy.
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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.
Affiliations
Guangdong Provincial Key Laboratory of Industrial Intelligent Inspection Technology, School of Electromechanical Engineering and Automation, Foshan University, Foshan 528225, China
Datang Boiler and Pressure Vessel Inspection Center Co., Ltd., Hefei 231200, China
Funding
Guangdong Basic and Applied Basic Research · Guangdong Provincial Ocean Economy Development Special Fund · Foshan Technology Project · Key Laboratory of Guangdong Regular Higher Education
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