Process-intrinsic cellular network for sustained strength-ductility across temperatures in a 3D-printed multi-principal-element alloy.

A 3D-printed Cr-Fe-Co-Ni-Al-Ti-based MPEA with an intrinsically formed BCC/L2 1 cellular network maintains yield strength above 1 GPa and ~20% uniform elongation from 77 to 873 K.

• Why it matters: LAM-made MPEAs often depend on L1 2 precipitate strengthening that requires post-processing, which rarely preserves mechanical performance across broad temperatures.
• What they did: They designed a (CrFeCo) 48 Ni 34 Al 7 Ti 5 V 5 Ta 1 alloy and used laser-based additive manufacturing to form a self-assembled BCC/L2 1 cellular network, then analyzed slip transfer and back-stress hardening across Kurdjumov-Sachs and Nishiyama-Wassermann interfaces.
• The result: Interface-mediated deformation stabilized by weakly temperature-dependent stacking fault energy enables sustained tensile performance without post-treatment, supporting interface coherency engineering to reduce temperature sensitivity.

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