|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||Microstructure Evolution of Cobalt-containing High Entropy Alloy with Varying Tungsten Content Synthesized via Mechanical Alloying and Spark Plasma Sintering
||Xueyao Wu, Siqi Li, Rong Liu, Matthew Yao, Xiaozhou Zhang
|On-Site Speaker (Planned)
A cobalt-containing high-entropy alloy (HEA) system with varying tungsten content, CoCrFeNiWx (x = 0.1, 0.2, 0.4, 1.0), is studied, with a focus on the influence of tungsten content on the microstructure, precipitation, hardness and wear resistance of the HEA. The alloyed powder is prepared through mechanical alloying (MA) and then examined by XRD. It is found that the alloying effect occurred in the milling process. The MAed powders are subjected to Differential Scanning Calorimetry (DSC) analysis to determine the melting points and to obtain cast-like bulk samples. The MAed CoCrFeNiW0.2 powder is also consolidated via spark plasma sintering (SPS). The experimental results show that increasing W content can promote precipitation and enhance entropy of CoCrFeNiWx HEA, resulting in an increase in hardness. The SPS specimens have higher hardness than the bulk samples from the DSC tests and exhibit comparable wear resistance to Stellite 6 fabricated via the same processing route.
||Planned: Metallurgical and Materials Transactions