Abstract
Effects of both tensile and compressive pre-strain on cyclic deformation of Z2CN18.10 austenitic stainless steel under stress cycling with mean stress are studied. As compared to as-received material, ratcheting strain of subsequent stress cycling decreases with increasing tensile pre-strain (TP) level. Lower level of compressive pre-strain (CP) is found to accelerate ratcheting strain accumulation while higher level of CP retards the accumulation. Tensile pre-straining is beneficial to ratcheting–fatigue life while compressive pre-straining is detrimental. A modified fatigue model to address the effect of pre-straining is proposed to predict the fatigue lives of the stress cycling tests with mean stress.
| Original language | English |
|---|---|
| Pages (from-to) | 106-113 |
| Number of pages | 8 |
| Journal | International Journal of Fatigue |
| Volume | 52 |
| DOIs | |
| State | Published - Jul 1 2013 |
| Externally published | Yes |
Funding
The authors gratefully acknowledge financial support for this work from the National High Technology Research and Development Program of China (863 Program 2009AA04Z403) and Ph.D. Programs Foundation of Ministry of Education of China (No. 20090032110016).
| Funders | Funder number |
|---|---|
| Ministry of Education of the People's Republic of China | 20090032110016 |
| National High-tech Research and Development Program | 2009AA04Z403 |
Keywords
- Cyclic deformation
- Fatigue life prediction
- Pre-strain
- Ratcheting
- Z2CN18.10 steel