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9 钛基金属玻璃低温渐进开裂行为及解释[51] (a) typical compressive stress-strain curve at 198 K and the definitions of the rupture stress (σr) and the area fraction of vein pattern region (fv) (Inset shows the illustration of a typical fracture surface. Asb, As, and Av are areas of the overall shear fracture surface, the smooth region, and the vein pattern region, respectively; Af1 and Af2 are the areas of the two regions with frictional morphology) (b) relationship between σr and fv (c, d) XRT images of interrupted compressive samples (e) variation of the true rupture stress (σtr) with testing temperature (θ is the shear fracture angle)

Fig.9 Low-temperature gradual cracking behaviors of a Ti-based MG and its explanation[51]