Abstract
Laser shock peening is an advanced surface treatment technique in improving the fatigue properties of metallic components. In this study, the effects of different laser shock peening regions on the high cycle fatigue of 42CrMo high-strength steel were investigated. Surface deformation, residual stress, and microhardness were analyzed, and microstructural evolution including grain size, boundary distribution, and misorientation was examined. Results show that peening the specimen with both surfaces and sides resulted in a better fatigue life than only peening the surface. The compressive residual stress introduced in both the surfaces and sides provided a higher resistance for fatigue initiation. In addition, the increase of low angle grain boundary accounted for the micro strengthening mechanism for the fatigue life extension.
| Original language | English |
|---|---|
| Article number | 012005 |
| Journal | IOP Conference Series: Materials Science and Engineering |
| Volume | 892 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Aug 2020 |
| Event | 3rd International Workshop on Materials Science and Mechanical Engineering, IWMSME 2020 - Hangzhou, China Duration: 18 Apr 2020 → 20 Apr 2020 |
Fingerprint
Dive into the research topics of 'Fatigue life extension of 42CrMo high-strength steel and its micro strengthening mechanism under laser shock peening'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver