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High Throughput Determination of Creep Parameters Using Cantilever Bending: Part i-Steady-State

Jalali, SIA and Kumar, P and Jayaram, V (2020) High Throughput Determination of Creep Parameters Using Cantilever Bending: Part i-Steady-State. In: Journal of Materials Research, 35 (4). pp. 353-361.

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Official URL: https://dx.doi.org/10.1557/jmr.2020.36


Variation of stress across the length and thickness of a cantilever during creep allows obtaining multiple pairs of strain rates and stress under steady-state condition. This work applies digital image correlation (DIC) and conjugate analytical models to obtain several such strain rate-stress pairs during steady-state creep by testing a single cantilever at a constant applied load. Furthermore, these strain rate-stress pairs are used to accurately determine the stress exponent of the material (e.g., Al and Pb). In addition, an empirical observation of plotting strain rate as a function of stress at fixed strain during primary creep for estimating stress exponent is extended to bending creep, wherein strain rates of the points in the cantilever lying on an iso-strain contour were plotted against the moment at the point to determine stress exponent. This study, thereby, proves that the bending creep-DIC combination is a high throughput test methodology for studying steady-state creep. Copyright © Materials Research Society 2020.

Item Type: Journal Article
Publication: Journal of Materials Research
Publisher: Cambridge University Press
Additional Information: The copyright of this article belongs to Cambridge University Press
Keywords: Creep; Creep testing; Image analysis; Nanocantilevers; Strain measurement, Bending creep; Digital image correlations; High throughput testing; Steady-state creep; Stress exponents, Strain rate
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 21 Aug 2020 06:55
Last Modified: 21 Aug 2020 06:55
URI: http://eprints.iisc.ac.in/id/eprint/64873

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