In-situ atomic-scale observation of dislocation and deformation twin interaction in FeMnCoCr high-entropy alloy

Figures & data

Figure 1. (a) EBSD characterization of Fe₄₈Mn₃₂Co₁₀Cr₁₀ alloy. (b) Nanoplate fabricated from a grain of the alloy using FIB. (c) Nanoscale deformation twins generated during straining. (d) The number and thickness of the deformation twins increased with strain. The insets in parts b-d show the corresponding SAED pattern of the deformed region. (e, f) HRTEM images captured before and after plastic deformation.

Figure 2. (a-d) In-situ HRTEM images of full dislocation interactions with the CTB and ITB in the Fe₄₈Mn₃₂Co₁₀Cr₁₀ alloy. The CTB is indicated by the red dashed line, and ITB is indicated by the dashed rectangle. Full dislocations are marked with symbol ‘T’.

Figure 3. (a-d) Magnified HRTEM images showing the full dislocation-CTB interaction during deformation. (e, f) HRTEM extract from the framed region of (b, c).

Figure 4. (a-d) Magnified HRTEM images showing the full dislocation-ITB interaction during deformation.