Bhanu Sankara Rao, K. ; Kalluri, Sreeramesh ; Halford, Gary R. ; McGaw, Michael A. (1995) Serrated flow and deformation substructure at room temperature in Inconel 718 superalloy during strain controlled fatigue Scripta Metallurgica et Materialia, 32 (4). pp. 493-498. ISSN 0956-716X
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Official URL: http://dx.doi.org/10.1016/0956-716X(95)90826-6
Related URL: http://dx.doi.org/10.1016/0956-716X(95)90826-6
Abstract
Serrated flow was observed in Inconel 718 during strain controlled fatigue at room temperature when tested after a double aging treatment. The material was also tested in the solution annealed condition. In both conditions, unlocking type serrations were seen in the plastic portions of stress-strain hysteresis loops, from the beginning until the end of the fatigue life. The back stress, exerted by accumulated parallel pile-ups of dislocations in planar slip bands and subsequent relaxation of internal stress by initiating new plastic flow in adjacent grains, is proposed to be the cause of serrated flow in this alloy at room temperature.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 18257 |
| Deposited On: | 17 Nov 2010 12:54 |
| Last Modified: | 18 May 2011 06:28 |
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