<p>FeCoCrNiMnTi<sub>x</sub> high entropy alloys (HEAs) coatings were prepared by laser cladding. The microstructure and wear resistance of the HEAs coatings after adding different Ti content were systematically studied. Experimental results revealed that Ti addition promoted the formation of BCC and (Co, Fe)<sub>2</sub>Ti Laves phases in the HEAs coatings, and the diffraction peaks of (111) crystal plane of FCC phase was shifted to small 2<i>θ</i> angle as Ti content was continuously added. The structure morphologies of the HEAs coatings were not obviously changed by Ti addition, and the microstructure was refined by the formation of fine and short dendrites and equiaxed crystals, and compact dislocations and dislocation stowage were also formed. The microhardness of the HEAs coatings was gradually improved as Ti content was added, and the mass loss and friction coefficient showed a trend of decreasing first and then increasing. Compared with FeCoCrNiMnTi<sub>0.0</sub> HEAs coatings, the microhardness of the HEAs coatings was improved by 128.32% for 1.0 of Ti addition, the mass loss and the friction coefficient was reduced by 54.75% and 10.72% for 0.75 of Ti addition, respectively. The wear mechanism of the HEAs coatings was transformed from adhesive wear and abrasive wear supplemented by oxidation wear to abrasive wear and supplemented by oxidation wear as Ti content was gradually added.</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

Research on Microstructure and Wear Resistance of FeCoCrNiMnTix High Entropy Alloy Coatings Fabricated by Laser Cladding

  • Lin Ding,
  • Xiumin Quan

摘要

FeCoCrNiMnTix high entropy alloys (HEAs) coatings were prepared by laser cladding. The microstructure and wear resistance of the HEAs coatings after adding different Ti content were systematically studied. Experimental results revealed that Ti addition promoted the formation of BCC and (Co, Fe)2Ti Laves phases in the HEAs coatings, and the diffraction peaks of (111) crystal plane of FCC phase was shifted to small 2θ angle as Ti content was continuously added. The structure morphologies of the HEAs coatings were not obviously changed by Ti addition, and the microstructure was refined by the formation of fine and short dendrites and equiaxed crystals, and compact dislocations and dislocation stowage were also formed. The microhardness of the HEAs coatings was gradually improved as Ti content was added, and the mass loss and friction coefficient showed a trend of decreasing first and then increasing. Compared with FeCoCrNiMnTi0.0 HEAs coatings, the microhardness of the HEAs coatings was improved by 128.32% for 1.0 of Ti addition, the mass loss and the friction coefficient was reduced by 54.75% and 10.72% for 0.75 of Ti addition, respectively. The wear mechanism of the HEAs coatings was transformed from adhesive wear and abrasive wear supplemented by oxidation wear to abrasive wear and supplemented by oxidation wear as Ti content was gradually added.