【摘要】 利用纳米压痕技术对高熵非晶合金Cu₂₉Zr₃₂Ti₁₅Al₅Ni₁₉分别在载荷控制模式、连续刚度模式和循环加载模式下进行了研究。该合金在纳米压入过程中会发生pop-in现象,且载荷大小比加载速率对pop-in现象的影响更大。当载荷超过40 mN时,即使采用高达5 mN/s的加载速率仍然可以观察到pop-in现象。该合金存在压痕尺寸效应,其测试纳米硬度随载荷的增大而下降,其Meyer指数（n）小于2。压入过程中的能量耗散分数（E_d）在54%～60%之间变化。循环加载测试结果显示该合金加工硬化效应明显。更多还原

【Abstract】 High entropy bulk metallic glass（HE-BMG）Cu₂₉Zr₃₂Ti₁₅Al₅Ni₁₉ was investigated by a nanoindentation method in load-controlled,continuous stiffness measurement（CSM）and cyclic loading modes.The results show that pop-in event occurs in this alloy during nanoindentation.The applied load has a greater influence on the pop-in events than the loading rate.When the applied load is larger than 40 mN,obvious pop-in events can be observed in the loading curves even at high loading rates up to 5 mN/s.Indentation size effect exists in this alloy,as confirmed by a decrease in hardness with increasing the indentation load and a Meyer’s index n less than 2.The fraction of energy dissipated during indentation（E_d）changes within the range of54%～60%.Cyclic loading tests reveal an obvious hardening effect.更多还原