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In Situ Diagnostics of Damage Accumulation in Ni-Based Superalloys Using High-Temperature Computed Tomography

Kageyama, K., Adziman, F., Alabort, E., Sui, Tan, Korsunsky, A. M. and Reed, R. C. (2018) In Situ Diagnostics of Damage Accumulation in Ni-Based Superalloys Using High-Temperature Computed Tomography Metallurgical and Materials Transactions A, 49 (9). pp. 4274-4289.

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Abstract

The design, operation, and performance of a laboratory-scale X-ray computed tomography arrangement that is capable of elevated-temperature deformation studies of superalloys to 800 °C and possibly beyond are reported. The system is optimized for acquisition of three-dimensional (3D) backprojection images recorded sequentially during tensile deformation at strain rates between 10−4 and 10−2 s−1, captured in situ. It is used to characterize the evolution of damage—for example, void formation and microcracking—in Nimonic 80A and Inconel 718 superalloys, which are studied as exemplar polycrystalline alloys with lesser and greater ductility, respectively. the results indicate that such damage can be resolved to within 30 to 50 μm. Collection of temporally and spatially resolved data for the damage evolution during deformation is proven. Hence, the processes leading to creep fracture initiation and final rupture can be quantified in a novel way.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Kageyama, K.
Adziman, F.
Alabort, E.
Sui, Tant.sui@surrey.ac.uk
Korsunsky, A. M.
Reed, R. C.
Date : 16 July 2018
DOI : 10.1007/s11661-018-4737-6
Copyright Disclaimer : © The Author(s) 2018. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Depositing User : Clive Harris
Date Deposited : 07 Aug 2018 10:48
Last Modified : 07 Aug 2018 10:48
URI: http://epubs.surrey.ac.uk/id/eprint/848862

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