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Published on: June 7, 2018
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High-rate squeezing process of bulk metallic glasses.
Jitang Fan1,2
1State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China.
Scientific Reports
|March 25, 2017
Summary
High-rate squeezing transforms metallic glass cylinders into sheets via impact loading. This process involves plastic flow, temperature rise, and offers new avenues for advanced material processing and treatments.
Area of Science:
- Materials Science
- Mechanical Engineering
- Solid Mechanics
Background:
- Bulk metallic glasses (BMGs) are challenging to process into complex shapes.
- Conventional methods for metal deformation often induce defects or are limited in scope.
Purpose of the Study:
- To investigate the high-rate squeezing (HRS) process for deforming bulk metallic glasses into intact sheets.
- To elucidate the underlying mechanisms governing large plastic deformation in BMGs under impact loading.
Main Methods:
- Impact loading was applied to cylindrical bulk metallic glass samples.
- High-speed deformation analysis was employed to capture the squeezing process.
- Microstructural characterization was performed to understand deformation mechanisms.
Main Results:
- Successful transformation of cylindrical BMGs into intact sheets via high-rate squeezing.
- Identified key mechanisms including plastic flow, shear banding, thermal softening, melting, and joining.
- Demonstrated the significant role of temperature rise during the HRS process.
Conclusions:
- High-rate squeezing (HRS) is a viable technique for processing bulk metallic glasses and other metallic alloys.
- HRS offers a novel approach for advanced material development, including grain refinement, coating, and welding.
- The process provides a new technological pathway for material treatment and manufacturing.
