Abstract
The effects of low temperature annealing, bluing, on the S-N curve of eutectoid steel wires drawn up to the strain of 3.5 were studied. Vickers hardness tests and measurements of residual strain along the wire axis using Heyn's method were also conducted. The fatigue limit as well as the hardness and the residual tensile stress in the surface layer of the wire increased with increase in the drawing strain. Bluing increased the hardness at low temperature up to 300°C and then decreased with the temperature rise. The residual stress diminished monotonically to zero with the bluing temperature rise up to 500°C. The bluing increased the fatigue limit, being highest at 400C, through combined effects of strain aging and recovery of the structure.
| Original language | English |
|---|---|
| Pages (from-to) | 2508-2513 |
| Number of pages | 6 |
| Journal | Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A |
| Volume | 64 |
| Issue number | 626 |
| DOIs | |
| State | Published - 1998 |
Keywords
- Bluing
- Drawing strain
- Eutectoid steel
- Fatigue
- Hardness
- Residual stress
- Strain aging
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering