Liang Wang, Jun Ding, Songshen Chen, Ke Jin, Qiuhong Zhang, Jiaxiang Cui, Benpeng Wang, Bing Chen, Tianyi Li, Yang Ren, Shijian Zheng, Kaisheng Ming, Wenjun Lu, Junhua Hou, Gang Sha, Jun Liang, Lu Wang, Yunfei Xue, En Ma
Uniform tensile ductility (UTD) is crucial for the forming/machining capabilities of structural materials. Normally, planar-slip induced narrow deformation bands localize the plastic strains and hence hamper UTD, particularly in body-centred-cubic (bcc) multi-principal element high-entropy alloys (HEAs), which generally exhibit early necking (UTD < 5%). Here we demonstrate a strategy to tailor the planar-slip bands in a Ti-Zr-V-Nb-Al bcc HEA, achieving a 25% UTD together with nearly 50% elongation-to-failure (approaching a ductile elemental metal), while offering gigapascal yield strength...
April 10, 2023: Nature Materials