从局域应力/应变视角理解异构金属材料的强韧化行为
Unraveling the Strength-Ductility Synergy of Heterostructured Metallic Materials from the Perspective of Local Stress/Strain
(a) microstructure (b) comparisons of tensile properties (c, d) effect of layered heterostructure on crack driving force and crack resistance (Jhom—crack-tip driving force for homogeneous structure, Jhet—crack-tip driving force for heterogeneous structure, Rhom—resistance to crack propagation for homogeneous structure, Rhet—resistance to crack propagation for heterogeneous structure, ahom—half of critical crack length for homogeneous structure, ahet—half of critical crack length for heterogeneous structure, r—affected zone size of heterogeneous interface) (e) schematic diagram of the effect of layered heterostructure on the plastic zone at the microcrack tip (rp—plastic zone size at the microcrack tip)
