| About this Abstract |
| Meeting |
Materials Science & Technology 2012
|
| Symposium
|
Symposium on the Fatigue of Materials II: Advances and Emergences in Understanding
|
| Presentation Title |
Effect of Laser Shock Peening (LSP) on the Fatigue Behavior of Ti-6Al-4V ELI Alloy |
| Author(s) |
Sagar Dilip Bhamare, Sethuraman Subramanian, James Guenes, Leonora Felon, David Kirschman, Seetha Ramaiah Mannava, Dong Qian, Vijay K. Vasudevan |
| On-Site Speaker (Planned) |
Sagar Dilip Bhamare |
| Abstract Scope |
Based on current bio-medical research that suggest that spinal implants with greater flexibility increase healing rate of spinal fusion, a novel implant rod, made from Ti-6Al-4V (ELI) was designed to replace current rigid rod, with the aim of increasing flexibility and simultaneously enhancing the fatigue strength by applying the laser shock peening (LSP) process. Residual stresses generated by LSP were measured using X-Ray diffraction and simulated using finite element method. Residual stress profiles are discussed. Results of four-point bending fatigue test of both untreated and LSP treated flexible implant rods are presented and compared with the current design. Fracture surfaces were characterized by SEM to elucidate crack growth mechanisms. It is found that LSP increases the fatigue life of novel design. A strain-life based fatigue life prediction model was developed to simulate the fatigue life estimates of LSP treated rods. Effectiveness of the life prediction model is discussed. |
| Proceedings Inclusion? |
Definite: A combination print-CD volume |