Phase-transformation toughening at high strain rates
This alloy accommodates plastic deformation via FCC-BCC-HCP phase transformation at high strain rates while maintaining high strength; its unique chemical short-range order and lattice distortion lower the transformation barrier and promote rapid dislocation multiplication, overcoming the strength-toughness trade-off.
Meng, Yuquan · Xia, Zeng · Shanshan, Liu · Li, Wanghui · Yun-Jiang, Wang · Song, Kaikai · Shao, Jianli · Xiao, Lijun · Song, Weidong
International Journal of Plasticity 2026
At a strain rate of 1×10⁸/s, deformation is dominated by dislocation slip
At a strain rate of 1×10¹⁰/s, deformation is dominated by FCC-BCC-HCP phase transformation
Twinning substructures in BCC martensite impart high strength