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Structure and Wear Resistance of TiC-Reinforced Al1.8CrCuFeNi2 High-Entropy Alloy Coating Using Laser Cladding.

Jing Guo1,2,3, Chenghao Liu1,2,3, Dexing Wang1,2,3

  • 1College of Mechanical and Electronic Engineering, Shandong Agricultural University, Tai'an 271018, China.

Materials (Basel, Switzerland)
|May 13, 2023
PubMed
Summary

Adding titanium carbide (TiC) to aluminum (Al) chromium (Cr) copper (Cu) iron (Fe) nickel (Ni) high-entropy alloy coatings improves hardness and wear resistance. This enhancement is attributed to fine-grain and dispersion strengthening effects from TiC.

Keywords:
coatingshigh-entropy alloystitanium carbidewear resistance

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Area of Science:

  • Materials Science
  • Metallurgy
  • Surface Engineering

Background:

  • High-entropy alloys (HEAs) offer unique properties for advanced applications.
  • Laser cladding is a key technique for creating protective HEA coatings.
  • Optimizing HEA coatings requires understanding the influence of reinforcing phases.

Purpose of the Study:

  • To investigate the impact of varying titanium carbide (TiC) content on Al1.8CrCuFeNi2 high-entropy alloy coatings.
  • To analyze the effects of TiC on the microstructure, hardness, and wear resistance of these coatings.
  • To elucidate the strengthening mechanisms imparted by TiC addition.

Main Methods:

  • Preparation of Al1.8CrCuFeNi2 high-entropy alloy coatings via laser cladding.
  • Systematic variation of TiC content (10 wt.%, 20 wt.%, 30 wt.%) in the coatings.
  • Microstructural characterization, hardness testing, and wear resistance evaluation.

Main Results:

  • Coatings with 10 wt.% TiC exhibited a single BCC phase.
  • Addition of 20 wt.% TiC resulted in a BCC and TiC phase structure.
  • Increased TiC content (up to 30 wt.%) led to more TiC-reinforcing phase formation.
  • Hardness increased and wear loss decreased significantly with rising TiC content.
  • Microstructural changes correlated directly with improved mechanical properties.

Conclusions:

  • Titanium carbide (TiC) addition effectively enhances the hardness and wear resistance of Al1.8CrCuFeNi2 high-entropy alloy coatings.
  • The observed improvements are primarily due to fine-grain strengthening and dispersion strengthening mechanisms induced by TiC.
  • Optimized TiC content in HEA coatings is crucial for superior performance in demanding applications.