Wear-Resistant TiC Strengthening CoCrNi-Based High-Entropy Alloy Composite

Yanlin Cai,Xiancheng Zhang,Hongfeng Huang,Manyu Hua,Zhifeng Li,Chengbiao Ma,Yongbing Mei,Shan Xu,Yonggang Tong,Yongle Hu

doi:10.3390/ma14164665

Abstract

In order to improve the wear resistance of CoCrNi alloy, TiC was introduced into the alloy and wear-resistant CoCrNi/(TiC)x composites were designed. The effects of TiC contents on the microstructure, mechanical properties, and wear resistance of CoCrNi matrix were investigated, respectively. It was found that the TiC produced dissolution and precipitation process in CoCrNi alloy, and a large number of needled and blocky TiC particles were precipitated in the composites. The compressive yield strength of CoCrNi/(TiC)x composites increased with the increasing TiC content. Compared with the CoCrNi alloy, the yield strength of CoCrNi/(TiC)x composites increased from 108 to 1371 MPa, and the corresponding strengthening mechanism contributed to the second phase strengthening. The wear resistance of CoCrNi/(TiC)x composites was also greatly improved due to the strengthening of TiC. Compared with the CoCrNi alloy, the specific wear rate of CoCrNi/(TiC)1.0 alloy was reduced by about 77%. The wear resistance of CoCrNi/(TiC)x composites was enhanced with the increasing content of TiC addition.

Highlights

Remanufacturing is one of the most efficient ways of recycling worn parts since it consumes only a fraction of the energy, cost, and material required for new parts
Solid solutions is promoted due to the high configuration entropy of high-entropy alloy. It has a series of excellent properties such as high strength, good wear resistance, corrosion resistance, and high-temperature oxidation resistance [5,6,7,8,9]
TiC powder with 99.5% purity was introduced into the CoCrNi alloy, and TiC powder is supplied by the Chengdu Huayin Powder Technology Company Limited

Summary

Introduction

Remanufacturing is one of the most efficient ways of recycling worn parts since it consumes only a fraction of the energy, cost, and material required for new parts. The development of high-entropy alloys in recent years has provided new ideas for the design of high-performance materials. The formation of simple FCC, BCC or HCP solid solutions is promoted due to the high configuration entropy of high-entropy alloy It has a series of excellent properties such as high strength, good wear resistance, corrosion resistance, and high-temperature oxidation resistance [5,6,7,8,9]. The addition of TiB2 in the matrix of (AlCrFeMnV) Bi10 high-entropy alloy reduced the wear rate by 85%, which significantly improved the wear resistance of the material [20]. The effects of TiC content on microstructure, mechanical properties, and wear resistance of CoCrNi alloy were investigated

Materials and Methods

Results and Discussion

Mechanical Properties

Typical

Friction

Conclusions