In-situ phase engineering strategy for enhancing the mechanical and tribological performance of AlCoCrFeNi2.1 high-entropy alloy
Source abstract
Abstract
A high-entropy alloy (HEA) composite was prepared via the laser-directed energy deposition (LDED) process using an in-situ phase-engineering strategy aimed at improving the structural and functional performance of the AlCoCrFeNi 2.1 HEA. Through deliberate phase-structure regulation, the B2 phase content increased markedly from 39.5% to 88.0%, accompanied by the precipitation of spherical nanoparticles. The incorporation of multiscale in-situ TiC ceramic particles, coupled with matrix strengthening, enhances both mechanical and tribological performance. The composite exhibited a hardness of 582.1 ± 29.4 HV and a yield strength of 1676.1 ± 37 MPa, corresponding to increases of 72.3% and 115.1%, respectively. The composite demonstrated superior wear resistance over the temperature range of 20 – 700 °C, with wear resistance enhanced by 2.1–5.5 times relative to the base alloy. Abrasive wear predominated in the composite under all test conditions, while the base alloy exhibited a thermally driven transition in wear mode, evolving from adhesive to delamination and oxidative wear.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: High Entropy Alloys Studies · Additive Manufacturing Materials and Processes · High-Temperature Coating Behaviors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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