Abstract
It has been well known that fatigue properties of steels are improved by grain refinement. In the STX-21 project, we have been developing low carbon steels with sub-micron meter grain sizes and reported that their tensile strength is 800 MPa and DBTT is around 77K. In this report, low- and high-cycle fatigue properties of ultrafine-grained steels with different grain diameters of 0.7 and 0.9 μm and different carbon contents of 0.05 and 0.15 mass% were investigated. The grain refinement improved high-cycle fatigue properties, whereas it did not affect low-cycle fatigue properties. Fatigue limit showed the similar Hall-Petch type relationship for several studies carried out hitherto.
| Original language | English |
|---|---|
| Pages (from-to) | 726-733 |
| Number of pages | 8 |
| Journal | Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan |
| Volume | 89 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2003 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Metals and Alloys
- Materials Chemistry