Yaqing Li, Aoxiang Li, Kaiwen Kang, Jinshan Zhang, Di Huang, Chunning Che, Borui Zhang, Saike Liu, Mingkun Xu, Yiteng Jiang, Gong Li
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引用次数: 0
Abstract
A comprehensive investigation was conducted on NbxCoCrFeNi2Al0.3 (x = 0.05, 0.10, 0.15) high-entropy alloys (HEAs), focusing on their phase evolution, microstructural characteristics, damping behavior, and mechanical properties as functions of Nb content. Microstructural analysis confirmed a dual-phase constitution in the alloy system, comprising a face-centered cubic (FCC) matrix as the primary phase with dispersed Laves phase precipitates serving as the secondary phase. As the Nb molar ratio increased from x = 0.05 to 0.15, the volume fraction of the Laves phase exhibited a significant increasing trend, rising from 1.8 vol% to 9.0 vol%. Performance tests demonstrated that the Nb0.15CoCrFeNi2Al0.3 alloy exhibited outstanding damping capacity of up to 0.055 at a strain amplitude of 3.2 × 10−4, while maintaining excellent mechanical properties. This optimized combination of damping capacity and mechanical properties enables the alloy not only to compete with conventional high-damping alloys but even to surpass them in certain key performance indicators.
期刊介绍:
This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys.
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