Prasad, Kartik ; Kumar, Vikas ; Bhanu Sankara Rao, K. ; Sundararaman, M. (2016) Effects of Crack Closure and Cyclic Deformation on Thermomechanical Fatigue Crack Growth of a Near α Titanium Alloy Metallurgical and Materials Transactions A, 47 (7). pp. 3713-3730. ISSN 1073-5623
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Official URL: http://doi.org/10.1007/s11661-016-3482-y
Related URL: http://dx.doi.org/10.1007/s11661-016-3482-y
Abstract
In this study, closure corrected in-phase (IP) and out-of-phase (OP) thermomechanical fatigue crack growth rates at two temperature intervals viz. 573 K to 723 K (300 °C to 450 °C) and 723 K to 873 K (450 °C to 600 °C) of Timetal 834 near α titanium alloy are presented. It is found that closure mechanisms significantly influence the stage I crack growth behavior. Surface roughness-induced crack closure (RICC) predominantly modifies the crack growth rate of near-threshold region at 573 K to 723 K (300 °C to 450 °C) test conditions. However, oxide-induced crack closure further strengthens RICC at 723 K to 873 K (450 °C to 600 °C) TMF loading. In stage II crack growth behavior, the alloy shows higher crack growth rates at 723 K to 873 K (450 °C to 600 °C) OP-TMF loading which is attributed to the combined effect of cyclic hardening occurring at the crack tip and weakening of interlamellar regions due to oxidation.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Springer-Verlag. |
| ID Code: | 133496 |
| Deposited On: | 29 Dec 2022 04:43 |
| Last Modified: | 29 Dec 2022 04:43 |
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