Research progress in control of microstructure and mechanical properties of in-situ bulk metallic glass composites

• Published in: Cai liao gong cheng = Journal of materials engineering Vol. 50; no. 5; pp. 78 - 89
• Main Authors: Zhai, Haimin, Ma, Xu, Yuan, Huayan, Ou, Mengjing, Li, Wensheng
• Format: Journal Article
• Language: Chinese
• Published: Beijing Beijing Institute of Aeronautical Materials 01-05-2022; Journal of Materials Engineering
• Subjects: Amorphous materials; Atomic clusters; Atomic structure; bulk metallic glass composites; Composition; Design parameters; Edge dislocations; Heat treatment; Mechanical properties; mechanical property; Metallic glasses; Microstructure; microstructure regulation; Particulate composites; Plastic deformation; Plastic properties; preparative technique; Process parameters; Room temperature; shear band; Shear bands
• ISSN: 1001-4381
• DOI: 10.11868/j.issn.1001-4381.2021.000328

Metallic glasses (MGs) have a series of excellent mechanical, physical, chemical and other properties due to their unique short-range ordered and long-range disordered atomic structure characteristics, making them have great potential application value in the field of advanced metal structural materials. However, when the bulk metallic glass (BMG) is deformed under room temperature, the large amount of free volume formed by the shear transformation of the atomic clusters will evolve into a highly localized shear bands. The localized shear bands will undergo instability expansion due to the lack of media, which leads to the fact that BMGs are very prone to brittle fracture at room temperature. In particular, there is no plasticity during uniaxial tension. In order to overcome this shortcoming, the researchers proposed to introduce the micron-sized crystal phase into the glass matrix to suppress the instability expansion of the shear band, so that the in-situ dendritic toughened bulk metallic glass composite (B