Achieve exceptional mechanical properties via regulating the short-range ordering

ZX Wang and J Sun and JB Zhao and YF Zhao and YQ Fu and YH Wu and Y Ma and HB Long and DL Kong and LH Wang and XD Han, MATERIALS TODAY NANO, 31, 100671 (2025).

DOI: 10.1016/j.mtnano.2025.100671

Metal nanowires usually exhibit ultrahigh strength, but have relatively low homogeneous plasticity. Previous studies on pure metals have shown that the poor ductility of nanowires is due to the thick twins, which leads to stress concentration. Here, we discovered that regulating the short-range order in high-entropy alloys (HEA) nanowires is the key to achieving excellent mechanical properties. The FeCoNiCuPd HEA nanowire with high strength of similar to 1.45 GPa and ultra-large uniform elongation of similar to 40.5 % was achieved. These excellent properties originate from V-shaped twins produced by alternately emitting partial dislocations on two intersecting 111 planes and zig-zag-like twins produced by separated partial dislocations. Our results provide new information on the deformation mechanism of metallic alloys and are valuable for designing metallic materials with superior mechanical properties.

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