The concept of high entropy alloys (HEAs) has already provided specific alloys presenting improved structural and functional properties. However, the discovery and development of new HEAs still represent a big challenge due to their chemical complexity. Diffusion multiples can be used as an experimental approach to screen large composition ranges. The method consists in heat-treating intimately bonded metallic blocks to activate diffusion, thus creating gradients of compositions. Local chemical and physical properties can be directly probed using advanced characterization techniques. The measured characteristics and properties can be further analysed to estimate diffusion properties or mechanical properties. In the present study, four different diffusion multiples related to the Cantor alloy system, Cr-Fe-Mn-Co-Ni, were investigated. Resulting microstructures were investigated after several heat treatments to assess the claimed entropy-based stabilization of a single phase. Crystallographic characterization by EBSD coupled to EDX mapping were compared to Calphad predictions. Local nano-indentation mapping was carried out and compared to the prediction of the yield strength model proposed by Walbrühl et al. (Mater Sci Eng A 700: 301–311, 2017, https://doi.org/10.1016/j.msea.2017.06.001).

高熵合金 (HEAs) 的概念已经提供了具有改进结构和功能特性的特定合金。然而，由于其化学复杂性，新 HEA 的发现和开发仍然是一个巨大的挑战。扩散倍数可用作筛选大成分范围的实验方法。该方法包括热处理紧密结合的金属块以激活扩散，从而产生成分梯度。可以使用先进的表征技术直接探测局部化学和物理特性。可以进一步分析测量的特性和特性以估计扩散特性或机械特性。在本研究中，研究了与 Cantor 合金系统 Cr-Fe-Mn-Co-Ni 相关的四种不同扩散倍数。在多次热处理后研究所得微观结构，以评估单相的基于熵的稳定性。将结合 EDX 映射的 EBSD 的晶体学表征与 Calphad 预测进行比较。进行了局部纳米压痕映射，并与 Walbrühl 等人提出的屈服强度模型的预测进行了比较。(Mater Sci Eng A 700: 301–311, 2017, https://doi.org/10.1016/j.msea.2017.06.001)。