金属玻璃的剪切带变形与断裂机制研究进展

屈瑞涛, 王晓地, 吴少杰, 张哲峰

Research Progress in Shear Banding Deformation and Fracture Mechanisms of Metallic Glasses

QU Ruitao, WANG Xiaodi, WU Shaojie, ZHANG Zhefeng

图15 TiZr基金属玻璃与CM400超高强钢的拉伸、压缩与缺口疲劳行为对比^[20]
(a) tensile and compressive engineering stress-strain curves of TiZr-MG and CM400 UHSS
(b, c) stress-life (S-N) fatigue data for the notched MG and UHSS (Data are presented in terms of the reversal cycles to failure (2N_f), as a function of the applied stress amplitude (σ_a = (σ_max - σ_min) / 2) and the applied stress amplitude normalized by the ultimate tensile strength (σ_a / σ_UTS), respectively. σ_max—the maximum cyclic stress, σ_min—the minimum cyclic stress, b—the fatigue exponent,

σ_{f}^{'}

—the fatigue coefficient)
(d, e) surface damage features near the fatigue crack in the notched UHSS and MG

Fig.15 Comparisons of tensile, compressive and notch fatigue behaviors between TiZr-based MG and CM400 ultra-high strength steel (UHSS)^[20]