Correlation of microstructural evolution and tensile mechanical behavior of Gd–Al–Co–Fe series “metallic glass” fibers

• DOI: 10.1016/j.jmrt.2021.07.053
• Publication Date: 2021-07-16T09:57:28Z
• Authors: Rui Liu; Xufeng Wang; Jingshun Liu; Yun Zhang; Guanyu Cao; Zetian Liu; Guanda Qu; Ze Li; Mingwei Zhang
• Keywords: Brittleness

In this study, the influence of Fe doping on microstructure and mechanical properties Gd–Al–Co “metallic glass” fibers (MGF) was systematically investigated, a fracture mechanics model constructed based morphology MGF. Furthermore, mechanism by which improves revealed. The results indicate that Gd–Al–Co–Fe series MGF has typical amorphous structure, with an appropriate amount increases order degree structure ψ, indicating small number nanocluster micro-regions are formed matrix. With increase in doping, tensile strength presents initial subsequent decrease. strength, Rm, GdAlCoFe2 largest (up to 1199 MPa), its reliability also superior (the threshold value 581.93 MPa). is flat fracture, showing characteristics brittle vein-shaped patterns, splitting, shear bands. A specific effectively hindered growth rate crack tips during stretching deformation microfibers, significantly improved This study lays foundation for engineering applications fields machinery.