Abstract
The deformation behaviour and structural evolution of bulk metallic glass sheets were studied under biaxial tension in supercooled liquid state. The sheets were gas pressure formed into hemispherical and semi-ellipsoid domes using dies with aspect ratios of 1:1 and 3:2, respectively, at the optimum temperature of 676 K. The structural evolution of the metallic glass sheets was examined after deformation. The stress distributions of the bulging sheets are calculated employing a finite element model. It was found that the stress state of biaxial tension accelerates nanocrystallization, which leads to an increase in the hardness of metallic glass. The gas pressure applied, bulging time, and temperature are the principal factors involved in the formation of products.
| Original language | English |
|---|---|
| Pages (from-to) | 159-163 |
| Number of pages | 5 |
| Journal | Journal of Alloys and Compounds |
| Volume | 484 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 18 Sept 2009 |
Keywords
- Bulging
- Gas pressure forming
- Metallic glasses
- Thermoplasticity
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry