Journal Article

PUBDB-2025-01662

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ductilization of 2.6-GPa alloys via short-range ordered interfaces and supranano precipitates

Yan, Y.-Q. ; Cha, W.-H. ; Liu, S. (Corresponding author) ; Ma, Y.Extern* ; Luan, J.-H. ; Rao, Z. ; Liu, C. (Corresponding author)Extern* ; Shan, Z.-W. ; Lu, J. R. (Corresponding author)Extern* ; Wu, G. (Corresponding author)

2025
Assoc. Washington, DC

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Please use a persistent id in citations: doi:10.1126/science.adr4917

Abstract: Higher strength and higher ductility are desirable for structural materials. However, ultrastrong alloys inevitably show decreased strain-hardening capacity, limiting their uniform elongation. We present a supranano (<10 nanometers) and short-range ordering design for grain interiors and grain boundary regions, respectively, in fine-grained alloys based on vanadium, cobalt, and nickel, with additions of tungsten, copper, aluminum, and boron. The pronounced grain boundary–related strengthening and ductilization mechanism is realized through segregation of the short-range ordering near the grain boundary. Furthermore, the supranano ordering with a larger size has an enhanced pinning effect for dislocations and stacking faults, multiplied and accumulated in grain interiors during plastic deformation. These mechanisms promote continuously increased flow stress until fracture of the alloy at 10% strain with 2.6-gigapascal tensile stress.

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Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20230050 (I-20230050) (I-20230050)

Experiment(s):

1. PETRA Beamline P02.1 (PETRA III)

Appears in the scientific report 2025

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