(CuMnNi)100-xAlx高熵铜合金的显微组织、力学与摩擦学性能研究

针对工业领域对新型高强高耐磨金属材料的需求，制备了(CuMnNi)100-xAlx (x＝0, 5, 10, 15)系列高熵铜合金，研究了Al含量对高熵铜合金的物相组成、显微组织、力学性能和摩擦磨损性能的影响. 结果表明：CuMnNi高熵合金仅由面心立方结构(FCC)的高熵固溶体相组成，Al元素的添加对合金基体FCC相产生了强烈的固溶强化作用，并促进了体心立方(BCC)相形成. FCC相具有良好的塑性和韧性，而BCC相具有高强度和高硬度，两者共同作用使(CuMnNi)100-xAlx系列高熵铜合金的强度随Al含量增加而提高，而塑性和韧性不断降低. 其中，(CuMnNi)90Al10高熵铜合金中FCC相和BCC相的含量达到最佳匹配，使其具有优异的综合力学性能. 室温下，得益于优异的力学性能和硬质BCC相良好的抗磨作用，(CuMnNi)90Al10高熵铜合金的耐磨性优于常规耐磨铝青铜C6161，磨粒磨损为其主要磨损机制.

To address the industrial demand for novel high-strength and high-wear-resistant metal materials, a series of (CuMnNi)₁₀₀₋ₓAlₓ (x = 0, 5, 10, 15) high-entropy copper alloys were fabricated. The influence of Al content on the phase composition, microstructure, mechanical properties and friction-wear performance of these high-entropy copper alloys was systematically studied. The results demonstrate that the CuMnNi high-entropy alloy consists solely of a face-centered cubic (FCC) high-entropy solid solution phase. The introduction of Al element not only exerts a pronounced solid solution strengthening effect on the FCC matrix phase, but also facilitates the formation of body-centered cubic (BCC) phase. The FCC phase boasts good plasticity and toughness, while the BCC phase exhibits high strength and hardness. The synergistic effect of these two phases leads to an increase in the strength of the (CuMnNi)₁₀₀₋ₓAlₓ series high-entropy copper alloys with increasing Al content, whereas their plasticity and toughness gradually decrease. Notably, the (CuMnNi)₉₀Al₁₀ high-entropy copper alloy achieves the optimal balance between FCC and BCC phase contents, thereby exhibiting outstanding comprehensive mechanical properties. At room temperature, owing to its excellent mechanical properties and the favorable wear resistance of the hard BCC phase, the wear resistance of the (CuMnNi)₉₀Al₁₀ high-entropy copper alloy outperforms that of the conventional wear-resistant aluminum bronze C6161, with abrasive wear serving as its primary wear mechanism.

搜集汇总

背景与挑战

背景概述

该数据集研究了(CuMnNi)100-xAlx高熵铜合金（Al含量x=0,5,10,15）的显微组织、力学和摩擦学性能。Al元素添加促进BCC相形成并增强固溶强化，使合金强度随Al增加而提高但塑性降低；其中(CuMnNi)90Al10合金因FCC和BCC相最佳匹配而具有优异综合性能，耐磨性优于常规铝青铜C6161，主要磨损机制为磨粒磨损。