Abstract
A study was conducted to demonstrate quasi-cleavage fracture along annealing twin boundaries in a Fe-Mn-C austenitic steel. A steel with a chemical composition of Fe-16.8Mn-0.29C was prepared by vacuum induction melting. The steel was hot forged and rolled at 1 273 K and it was solution treated at 1 273 K for 3.6 ks under an argon atmosphere and water quenched. Microstructural observations were made by optical microscopy, atomic force microscopy (AFM), and scanning electron microscopy (SEM) to produce a fractograph. Electron backscatter diffraction (EBSD) analyses were also conducted at 20 kV with a beam step size of 1 μm to characterize the boundaries. The specimen for optical microscopy, AFM, and EBSD analyses was electrolytically polished at 277 K after mechanical polishing. The serrations at ambient temperature in the steels were reported to be attributed to dynamic strain aging.
| Original language | English |
|---|---|
| Pages (from-to) | 161-163 |
| Number of pages | 3 |
| Journal | Isij International |
| Volume | 52 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2012 |
| Externally published | Yes |
Keywords
- Austenitic steel
- High mn steel
- High strength steel
- Martensitic transformation
- Quasicleavage fracture
- Twin boundary
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry