Bar, H N and Sahu, J K and Parida, N and Gunjan, M K (2011) Failure Investigation of Components of Aero Engine No. HDR-80376U. Consultancy (CNP). National Metallurgy Laboratory, Jamshedpur. (Submitted)
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Abstract
The main bevel gear (pinion) is low alloy steel and has tempered martensitic microstcture. The case hardening was proper as was observed through microsturctural analysis and microhardness profile. The microhardness varied from 750 VHN at the case to 450 VHN at the core when measured along the thickness of the tooth. Therefore no material abnormality and flaws have been found in the bevel pinion to be a causative factor for the failure. However, fractographic examinations under SEM revealed dominant fatigue crack, which might have been initiated due to tooth bending fatigue and this, might have caused the failure of the tooth. The main quill shaft has failed due to torsion overloading.
| Item Type: | Project Reports (Consultancy (CNP)) |
|---|---|
| Official URL/DOI: | http://www.nmlindia.org |
| Uncontrolled Keywords: | Bending fatigue, beach marks, temper martensitic microstructure, Case hardened steel, spriral bevel gear |
| Divisions: | Material Science and Technology |
| ID Code: | 2859 |
| Deposited By: | A K Sahu |
| Deposited On: | 20 May 2011 14:29 |
| Last Modified: | 21 Nov 2011 11:58 |
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