TY  - JOUR
AU  - Liu, Chang
AU  - Lu, Wenjun
AU  - Xia, Wenzhen
AU  - Du, Chaowei
AU  - Rao, Ziyuan
AU  - Best, James P.
AU  - Brinckmann, Steffen
AU  - Lu, Jian
AU  - Gault, Baptiste
AU  - Dehm, Gerhard
AU  - Wu, Ge
AU  - Li, Zhiming
AU  - Raabe, Dierk
TI  - Massive interstitial solid solution alloys achieve near-theoretical strength
JO  - Nature Communications
VL  - 13
IS  - 1
SN  - 2041-1723
CY  - [London]
PB  - Nature Publishing Group UK
M1  - FZJ-2022-02737
SP  - 1102
PY  - 2022
AB  - Interstitials, e.g., C, N, and O, are attractive alloying elements as small atoms on interstitial sites create strong lattice distortions and hence substantially strengthen metals. However, brittle ceramics such as oxides and carbides usually form, instead of solid solutions, when the interstitial content exceeds a critical yet low value (e.g., 2 at.%). Here we introduce a class of massive interstitial solid solution (MISS) alloys by using a highly distorted substitutional host lattice, which enables solution of massive amounts of interstitials as an additional principal element class, without forming ceramic phases. For a TiNbZr-O-C-N MISS model system, the content of interstitial O reaches 12 at.%, with no oxides formed. The alloy reveals an ultrahigh compressive yield strength of 4.2 GPa, approaching the theoretical limit, and large deformability (65% strain) at ambient temperature, without localized shear deformation. The MISS concept thus offers a new avenue in the development of metallic materials with excellent mechanical properties.
LB  - PUB:(DE-HGF)16
C6  - 35232964
UR  - <Go to ISI:>//WOS:000771136200007
DO  - DOI:10.1038/s41467-022-28706-w
UR  - https://juser.fz-juelich.de/record/908648
ER  -