Fig. 2: Microstructural information of the discovered LWHEAs.
From: High-throughput design of high-performance lightweight high-entropy alloys
a Synchrotron XRD patterns of Alloys 1–8 in their as-cast states. b, c Backscattered electron (BSE) images of the representative Alloys 1 (Al20Cr5Fe50Mn20Ti5) and 7 (Al30Cr5Fe50Mn10Ti5), representatively. d, e The TEM DF images taken by the unique (111) reflection of the L21 phase and the corresponding selected-area diffraction (SAED) patterns along the [100] and [110] zone axes of Alloys 1 and 7 in their as-cast states, respectively. The arrows indicate the features of precipitates, antiphase domain (APD), and antiphase boundary (APB). f High-resolution TEM (HRTEM) image of Alloy 1 taken along the [110] zone axis, showing the coherent interfaces between the BCC matrix and the L21 nanoscale precipitates. The next two images are the fast Fourier Transform (FFT) patterns of the BCC matrix and L21 precipitates of Alloy 1. g The TEM DF images taken by the unique (111) reflection of the L21 phase of the Alloy 7 after annealing at 700 °C for 2 h, showing the greatly grown APDs. h, i APT atomic maps of Alloys 1 and 7, respectively.
