Nanocrystallization enabled tensile ductility of Co-based amorphous microwires

作者：Wang Huan; Xing Dawei; Peng Huaxin; Qin Faxiang; Cao Fuyang; Wang Guoqiang; Sun Jianfei^*

来源：Scripta Materialia, 2012, 66(12): 1041-1044.

DOI：10.1016/j.scriptamat.2012.02.020

• Amorphous wire
• Melt extraction
• Cold drawing
• Tensile ductility
• Microstructure evolution

Melt-extracted amorphous Co68.15Fe4.35Si12.25B15.25 microwires were drawn at ambient temperature into different diameters and the dependence of tensile properties and microstructural evolution on the degree of deformation was investigated. The cold-drawn wire with 51% area cross-section reduction exhibits a tensile ductility of 1.64%, with a tensile strength exceeding 4000 MPa. Deformation-induced Co-rich nanocrystals were observed in the cold-drawn wires and proved to be capable of arresting the quick extension of shear bands and leading to the enhanced global plasticity of the microwires.

• 出版日期2012-6
• 单位哈尔滨工业大学