Afzal Jalali, SI and Kumar, P and Jayaram, V (2020) High Throughput Determination of Creep Parameters Using Cantilever Bending: Part II-Primary and Steady-State through Uniaxial Equivalency. In: Journal of Materials Research, 35 (4). pp. 362-371.
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The stress and hence strain fields in a cantilever deforming as per power-law creep vary across the length and thickness of the sample, which allow obtaining multiple stress-strain pairs from a single test. Here, a high-throughput method is described to quantify the primary-cum-steady-state creep response of materials by testing a single cantilever sample in bending and mapping strain fields using digital image correlation. The method is based on the existence of stress invariant points in a cantilever, where the value of stress does not change during creep. It is demonstrated that strain evolution throughout primary and steady-state stages at these points is identical to the creep response obtained under uniaxial tests. Furthermore, the gained insights were exploited to obtain various parameters of a power-law type primary-cum-steady-state creep equation by testing only one cantilever sample. The developed method allows obtaining uniaxial creep curves at multiple stresses by testing a single cantilever, thereby reducing the time and number of samples required to understand the creep behavior of a material. The method has been validated by performing bending tests on Al and comparing the results with those of corresponding uniaxial tests. Copyright © Materials Research Society 2020.
| Item Type: | Journal Article |
|---|---|
| Publication: | Journal of Materials Research |
| Publisher: | Cambridge University Press |
| Additional Information: | Copyright of this article belongs to Cambridge University Press |
| Keywords: | Bending tests; Creep; Equations of state; Nanocantilevers, Bending creep; Steady-state creep; Stress invariants; Testing methodology; Uniaxial creep, Creep testing |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 22 Apr 2021 09:27 |
| Last Modified: | 22 Apr 2021 09:27 |
| URI: | http://eprints.iisc.ac.in/id/eprint/64872 |
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