材料科学
摩擦学
尼亚尔
异质结
合金
高熵合金
纳米-
复合材料
晶界
冶金
微观结构
金属间化合物
光电子学
作者
Yushan Geng,Hui Tan,Long Wang,Anh Kiet Tieu,Jiao Chen,Jun Cheng,Jun Yang
标识
DOI:10.1016/j.triboint.2020.106662
摘要
High strength, ductile and wear-resistant alloys are required for engineering applications. This work reports a good combination of mechanical and tribological properties in (NiAl)x(FeCr)yCo(x+y)/2 high-entropy alloys (HEAs) via adjusting A2/B2 nano-coupled heterostructure. The A2/B2 heterostructure switches from weave to network structure by increasing x:y ratio from 1:1.3 to 1:1, and eventually forms an island structure when x:y ratio is 1.3:1. Concurrently, the grain boundary FCC phase transforms from continuous to discontinuous as its fraction decreases. The island-like A2/B2 heterostructure provides (NiAl)1.3(FeCr)Co1.15 HEA a good compressive yield strength of 1.7 GPa and plasticity of 23.4%. Additionally, (NiAl)1.3(FeCr)Co1.15 HEA has the promising wear-resistance from room temperature to 800 °C, ascribing to its excellent strength and the protective tribo-layer at high temperatures.
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