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Creep behavior of additively manufactured high strength A205 aluminum alloy

Kulkarni, A and Srinivasan, D and Ravanappa, P and Jayaram, V and Kumar, P (2023) Creep behavior of additively manufactured high strength A205 aluminum alloy. In: Additive Manufacturing Letters, 6 .

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Official URL: https://doi.org/10.1016/j.addlet.2023.100142


A20X, an additively manufactured high-strength aluminum alloy, was studied for its creep behavior at 200°C via the conventional uniaxial method and a novel, small-scale cantilever bending creep test, wherein the 2D strain field was measured using digital image correlation. A fine-grained microstructure with nano-scaled precipitates of Ω (Al-Cu-Ag-Mg) and θ′ (Al-Cu) leads to a stable microstructure and excellent mechanical properties at 200 °C in the solutionized and aged condition. The alloy displayed creep-resistant behavior with minimum strain rates of the order of 10−8-10−6 s−1 at 200 °C at 120-180 MPa. Uniaxial creep equivalence with bending creep was established, and the excellent creep resistance was attributed to the nano-scaled precipitates, which were shown to pin the dislocations effectively. Interestingly, a single bending test was able to effectively generate both tension and compression creep curves using small specimens, thereby establishing its suitability for near-net-shaped additively manufactured components.

Item Type: Journal Article
Publication: Additive Manufacturing Letters
Publisher: Elsevier Inc.
Additional Information: The copyright for this article belongs to the Author.
Keywords: A205; Additive manufacturing; DIC-augmented-bending creep; High throughput creep testing; Structure-property relationship for creep
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 28 Jul 2023 07:00
Last Modified: 28 Jul 2023 07:00
URI: https://eprints.iisc.ac.in/id/eprint/82575

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