Shastry, C. Girish ; Parameswaran, P. ; Mathew, M. D. ; Bhanu Sankara Rao, K. ; Mannan, S. L. (2007) The effect of strain rate and temperature on the elevated temperature tensile flow behavior of service-exposed 2.25Cr-1Mo steel Materials Science and Engineering: A, 465 (1-2). pp. 109-115. ISSN 0921-5093
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S09215...
Related URL: http://dx.doi.org/10.1016/j.msea.2007.02.052
Abstract
The elevated temperature tensile flow behavior of service-exposed 2.25Cr-1Mo steel has been critically examined with respect to strain rate sensitivity (m) and apparent activation energy (Q) for tensile deformation. The predominant role of forest dislocations in determining the relative flow response at true plastic strains greater than 0.01 is inferred from the profile of 'm' against flow stress. The variation of 'm' with temperature and strain is discussed based on the kinetics of dislocation generation and recovery. The decrease in Q with the increase in strain rate or temperature is attributed to the increase in recovery processes like dislocation annihilation and subcell/subgrain formation. This suggestion has been supported by transmission electron microscopy.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | 2.25Cr-1Mo Steel; Tensile Deformation Behavior; Strain Rate Effect Dislocation-dislocation Interaction; Thermal Activation; Apparent Activation Energy |
| ID Code: | 18362 |
| Deposited On: | 17 Nov 2010 09:25 |
| Last Modified: | 18 May 2011 05:42 |
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