Abstract
The zinc coating layer fracture properties of a galvannealed steel and an electrolytically galvanized steel are analyzed by conducting the in-situ bending test with newly designed samples. It is found that the fracture develops much earlier in the coating layers of the galvannealed steel than that of the electrolytically galvanized steel. Using transmission electron microscope and energy dispersive X-ray spectroscopy, the intermetallic phases of the coating layers are characterized and it is found that the early crack initiation in a galvannealed steel is mainly triggered in the gamma phase. Combining with nanoindentation tests and corresponding simulation, the deformability of intermetallic phases are analyzed to explain the failure behavior of coating layers in the two steels.
| Original language | English |
|---|---|
| Pages (from-to) | 320-325 |
| Number of pages | 6 |
| Journal | MATERIALS SCIENCE AND ENGINEERING A: STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING |
| Volume | 732 |
| DOIs | |
| Publication status | Published - 8 Aug 2018 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- Electrolytically galvanized steel
- Fracture properties
- Galvannealed steel
- Zinc coating layer