Scholarlink

<p>A novel high-entropy alloy (HEA) system, CoCrFeNiMo<sub><i>x</i></sub> (<i>x</i> = 0.05, 0.1, 0.14, 0.2), is proposed in comparison with low-C and Mo-containing Stellite alloy for wear resistance applications. The proposed HEAs are fabricated via mechanical alloying (MA) of the elemental powders and consolidation with spark plasma sintering (SPS). The elemental powders milled for different durations are examined with x-ray diffraction (XRD) and also analyzed using differential scanning calorimetry (DSC) to find the appropriate milling duration which can achieve complete MA of the powders. The MAed powders are then consolidated via SPS. The microstructures of the SPS specimens are investigated using SEM/EDS/XRD. The hardness and wear resistance of the CoCrFeNiMo<sub><i>x</i></sub> SPS specimens are evaluated under Rockwell hardness and dry-sliding wear tests, respectively. Stellite 21, which is Co-based and contains low C and moderate Mo contents, is also studied in parallel with CoCrFeNiMo<sub>x</sub> for comparison. The carbides formed in the MAed powders and thereby in the SPS specimens due to carbon involvement from the process control agent (PCA) in the MA process and the effects of Mo on the entropy, solid solution strengthening, hence the wear resistance of CoCrFeNiMo<sub><i>x</i></sub> HEAs are discussed.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Microstructure Characterization and Wear Performance Evaluation of High-Entropy Alloys Containing Cobalt and Molybdenum Fabricated via Mechanical Alloying and Spark Plasma Sintering

  • 期刊论文

  • 发表日期：

    2026年4月24日

查看全文
  • Xueyao Wu,
  • Rong Liu,
  • Matthew X. Yao

摘要

A novel high-entropy alloy (HEA) system, CoCrFeNiMox (x = 0.05, 0.1, 0.14, 0.2), is proposed in comparison with low-C and Mo-containing Stellite alloy for wear resistance applications. The proposed HEAs are fabricated via mechanical alloying (MA) of the elemental powders and consolidation with spark plasma sintering (SPS). The elemental powders milled for different durations are examined with x-ray diffraction (XRD) and also analyzed using differential scanning calorimetry (DSC) to find the appropriate milling duration which can achieve complete MA of the powders. The MAed powders are then consolidated via SPS. The microstructures of the SPS specimens are investigated using SEM/EDS/XRD. The hardness and wear resistance of the CoCrFeNiMox SPS specimens are evaluated under Rockwell hardness and dry-sliding wear tests, respectively. Stellite 21, which is Co-based and contains low C and moderate Mo contents, is also studied in parallel with CoCrFeNiMox for comparison. The carbides formed in the MAed powders and thereby in the SPS specimens due to carbon involvement from the process control agent (PCA) in the MA process and the effects of Mo on the entropy, solid solution strengthening, hence the wear resistance of CoCrFeNiMox HEAs are discussed.