如何使合金兼具高强度与高塑性

马恩, 刘畅

Achieving Alloys with Concurrent High Strength and High Ductility

MA En (MA Evan), LIU Chang

图4 屈服强度< 1.2 GPa[17]和1.2~2.2 GPa范围内金属材料拉伸屈服强度-均匀应变总图

Fig.4 Summary diagrams showing tensile yield strength vs uniform strain (elongation) (a) the regime for yield strength < 1.2 GPa, for which the available data points thus far have already occupied the entire space, with the upper rim (dashed line) exhibiting the shape of an up-side-down banana[17] (HEAs—high-entropy alloys, HN metals—heterogeneous nanostructured metals) (b) extended regime up to 2.2 GPa, the strength of the strongest bulk super steels (The detailed compositions for these alloys are listed in Supplementary Information 4. The upper-rim dashed line represents a currently reachable envelope, towards which our team is pushing forward with accruing experimental data (green stars). The arrow points to the future direction to go, approaching the upper-right corner where the combination of concurrent high strength and ductility is optimized)