Fig. 4: TEM and SEM characterized structural evolutions at different strain amplitudes. | Nature Communications

Fig. 4: TEM and SEM characterized structural evolutions at different strain amplitudes.

From: Enhancing fatigue life by ductile-transformable multicomponent B2 precipitates in a high-entropy alloy

Fig. 4

a, b; c, d; e, f; and g, h are the TEM bright-field (BF) images at the strain amplitudes of ±0.25%, ±0.5%, ±1%, and ±1.75%, respectively, showing the structural evolution of the cyclic response of deformation features (the inset figure in Fig. 5a) is the dark-field (DF) image, presenting the plastically-deformable B2 phase). i–l are the SEM images of the fractured samples at the strain amplitudes of ±0.25%, ±1.25%, and ±1.75%, exhibiting the crack-formation features at low and high strain amplitudes.

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