fig2

Figure 2. TEM analysis of Fe₅₀Mn₃₀Co₁₀Cr₁₀ (at.%) CCA after water quenching. (A) Low-magnification bright-field TEM image of a Σ3 twin within the CCA matrix. The Σ3 twin consists of two coherent Σ3 boundaries (indicated by red dashed lines) and three nanofacets (marked by orange solid square). (B and C) Corresponding SAEDs along the <110>γ zone axis taken from the green and purple dashed circles in (A), respectively. (D) High-magnification bright-field TEM image of Σ3 twin boundary from (A). Three nanofacets are referred to as incoherent Σ3 boundary boundaries (ITBs) and highlighted in blue. (E) Corresponding dark-field TEM image of (D) obtained using the reflection marked by the blue dashed circle in (C). TEM: Transmission electron microscopy; CCA: compositionally complex alloy; SAEDs: selected area electron diffractions.