EFFECT OF W CONTENT ON WEAR RESISTANCE OF COCRFENIMNWX HIGH ENTROPY ALLOY

Wenjie Zhu, Yuzuo Liu, Charan Kumar Gatenda

ABSTRACT:High entropy alloys show excellent properties that traditional metals do not have in many aspects, but their high preparation cost and unstable properties make it difficult to scale production. In this paper, CoCrFeNiMnWx high entropy alloy was prepared by low-cost mature process powder metallurgy, and the effects of W content on the composition, structure, hardness and rub proofness of the alloy were studied. It was found that the alloy could form FCC phase CoCrFeNiMn solid solution without the addition of W, and Fe7W6 phase would be formed with the addition of W. This phase can significantly improve the hardness and wear resistance of the material. With the further increase of W content, the precipitation of W element further increases the hardness of the material, but its wear resistance decreases, because the wear form changes from abrasive wear to oxidative wear with the formation of Fe7W6 phase, and the wear form changes to fatigue wear with the precipitation of W element.

Keywords:CoCrFeNiMnW, high entropy alloy, wear resistance, wear pattern