Notch-tensile behavior of an Al_0.1CrFeCoNi high entropy alloy (Al_0.1-HEA) was studied using V-notch geometry and with local strain mapping using digital image correlation (DIC). A notch-strength ratio of 1.51 indicated notch strengthening. Further analysis of stress-strain response supplemented with microstructural analysis revealed that, while the presence of notch results in strengthening due to work hardening by twinning induced plasticity, the notch also contributes strongly to geometrical softening in the non-uniform ductility regime, and accounts for the onset of failure. The strain localization behavior of Al_0.1-HEA due to the presence of V-notch was compared with three conventional alloys: Inconel 625 nickel-based superalloy, 304 stainless steel and Ti–6Al–4V titanium alloy. The study revealed that the nature of notch widening with increasing strain was dependent on material characteristics. The extent of notch widening impacted the local strain field and stress distribution, thereby influencing the propensity for crack initiation and growth. The experimental results were verified by finite element analysis.

使用V型缺口几何形状和使用数字图像相关性（DIC）进行局部应变映射研究了Al _0.1 CrFeCoNi高熵合金（Al _0.1 -HEA）的缺口拉伸行为。缺口强度比为1.51表示缺口增强。通过对应力-应变响应的进一步分析并辅以微观结构分析，可以发现，虽然缺口的存在会由于孪晶诱发的塑性而使加工硬化而导致强化，但缺口在非均匀延性范围内也对几何形状的软化有很大贡献，并说明了失败的开始。Al _0.1的应变局部化行为将由于存在V型缺口而产生的-HEA与三种常规合金进行了比较：Inconel 625镍基高温合金，304不锈钢和Ti-6Al-4V钛合金。该研究表明，随着应变的增加，缺口扩大的性质取决于材料特性。缺口扩展的程度影响了局部应变场和应力分布，从而影响了裂纹萌生和扩展的倾向。通过有限元分析验证了实验结果。