Abstract
An examination has been made of the fatigue properties of ultra-fine grained two phase ferrite/martensite low carbon steel, produced by equal channel angular pressing (ECAP). The fatigue strength and fracture mechanism of the ECAP steel were compared with those of the as-received sample. The fatigue strength of the ECAP steel was twice as high as that of the as-received steel. The fatigue strength was linearly related to the tensile strength for both the ECAP and as-received steels although their slopes were different; the slope for the ECAP steel was greater. In addition, different fracture characteristics were observed; intergranular fractures were dominant in the ECAP steel whereas transgranular fractures occurred in the as-received steel. Such differences in fatigue strength and fracture characteristic are attributed to their material properties.
| Original language | English |
|---|---|
| Pages (from-to) | 1358-1365 |
| Number of pages | 8 |
| Journal | International Journal of Fatigue |
| Volume | 30 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 2008 |
| Externally published | Yes |
Keywords
- Dual phase steel
- Equal channel angular pressing
- Fatigue properties
- Fracture mechanism
- Ultra-fine grain
ASJC Scopus subject areas
- Modelling and Simulation
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering