Science Advances

Supplementary Materials

The PDF file includes:

  • Section S1. HEA morphology and thermal stability
  • Section S2. Thermal stability
  • Section S3. Irradiation
  • Section S4. Mechanical properties
  • Section S5. Enthalpies of mixing
  • Section S6. Chemical ordering
  • Section S7. Dose values
  • Fig. S1. Alloy structure.
  • Fig. S2. Bright-field TEM micrographs W-Ta-Cr-V HEA alloy as a function of time during the thermal stability experiment performed in situ with TEM, showing no change in the grain sizes of the nanocrystalline or the ultrafine grains but slight black spots in some grains (precipitation).
  • Fig. S3. APT analysis of the HEA after annealing at 1050 K.
  • Fig. S4. Bright-field TEM micrographs as a function of dpa of in situ 1-MeV Kr+2-irradiated HEA at 1073 K using a dpa rate of 0.0006 dpa s−1.
  • Fig. S5. Bright-field TEM micrographs as a function of dpa of in situ 1-MeV Kr+2-irradiated HEA at room temperature using a dpa rate of 0.0006 dpa s−1.
  • Fig. S6. Mechanical response of the HEA.
  • Fig. S7. Enthalpies of mixing of all binary alloys in the quaternary W-Ta-Cr-V system obtained from DFT and CE calculations.
  • Fig. S8. Average SRO parameters in the W38Ta36Cr15V11 alloy as a function of temperature.
  • Fig. S9. Atomic configurations for a W38Ta36Cr15V11 alloy obtained from MC simulations.
  • Fig. S10. Ion and displacement damage distribution of 1-MeV Kr+2 and 3-MeV Cu+ in the HEA.

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Other Supplementary Material for this manuscript includes the following:

  • Movie S1 (.avi format). Irradiation of the HEA films at low dose and 1073 K.
  • Movie S2 (.avi format). Irradiation of the HEA films at high dose and 1073 K.
  • Movie S3 (.avi format). Irradiation of the HEA films at room temperature.

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