Rajpurohit, R S and Jena, P S M and Mahato, B and Sahu, J K (2020) Strain partitioning between matrix and precipitates during fatigue deformation of 2.25Cr-Mo steel. Material Science and Technology (IF-1.835).
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Abstract
The influence of stress rate on load/strain partitioning between different phases of a micro-alloyed 2.25Cr-Mo steel during stress-controlled fatigue deformation at room temperature (RT) was studied by conducting asymmetrical ratcheting fatigue tests employing values of 50-450 MPa/s. Fatigue life (N-f) significantly reduced for tests conducted by employing = 50 MPa/s compared to 450 MPa/s, i.e. N-f = 510 and 24,983 cycles respectively. From TEM studies, it is confirmed that due to load/strain partitioning stacking faults (SFs)/micro-twin formed in M23C6 carbides during high fatigue deformation, whereas dislocation cells are formed in low fatigue deformation. A plausible explanation to account for different cycle life with change in of fatigue deformation is offered.
| Item Type: | Article |
|---|---|
| Official URL/DOI: | http:// 10.1080/02670836.2020.1762981 |
| Uncontrolled Keywords: | Cyclic strain; defects; fatigue life; M23C6 carbide; stacking faults; microstructure; micro-twin;carbides |
| Divisions: | Material Science and Technology |
| ID Code: | 8151 |
| Deposited By: | Sahu A K |
| Deposited On: | 11 Jun 2020 10:37 |
| Last Modified: | 17 Nov 2020 15:08 |
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