About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Fatigue Failure in Zinc Plated Tapping Screws |
| Author(s) |
Mahesh N. Darji |
| On-Site Speaker (Planned) |
Mahesh N. Darji |
| Abstract Scope |
Fatigue is the phenomenon leading to fracture under repeated or fluctuating stresses less than the tensile strength of the material. There are three stages of fatigue failure: initiation, propagation and final fracture. The present investigation was conducted on the Tapping Screw heads which were shearing off just around 10K cycles during their life cycle test. The breakage occurred near the root of the thread, further observation of fracture surfaces revealed the presence of beach marks-ratchet marks and Burrs, cracks were initiated near the outer surface of the screws. The failure analysis conducted to identify characterization features on the fracture surface through Keyence Microscopy and Scanning Electron microscopy respectively. Metallography was conducted to know any material anomalies in metallurgical microstructure. The root cause of the failure was concluded as; the fatigue, resulted through Cylic loading in the evidence of surface scaling, burrs and poor surface quality of the Taping screws. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Characterization, Other |