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Mechanical Properties and Fracture Behaviors of GTA-Additive Manufactured 2219-Al After an Especial Heat Treatment

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Abstract

2219-Al parts were produced by gas tungsten arc-additive manufacturing and sequentially processed by an especial heat treatment. In order to investigate the effects of heat treatment on its mechanical properties, multiple tests were conducted. Hardness tests were carried out on part scale and layer scale along with tensile tests which were performed on welding and building directions. Results show that compared to conventional casting + T6 2219-Al, the current deposit + T6 2219-Al exhibits satisfying properties with regard to strength but unsatisfying results in plasticity. Additionally, anisotropy is significant. Fractures were observed and the cracks’ propagating paths in both directional specimens are described. The effects of heat treatment on the cracks’ initiation and propagation were also investigated. Ultimately, a revised formula was developed to calculate the strength of the deposit + T6 2219-Al. The aforementioned formula, which takes into consideration the belt-like porosities-distributing feature, can scientifically describe the anisotropic properties in the material.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, No. 92 West-Dazhi Street, Harbin, 150001, China

    J. Y. Bai, C. L. Fan, S. B. Lin, C. L. Yang & B. L. Dong

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  1. J. Y. Bai
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  2. C. L. Fan
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  3. S. B. Lin
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  4. C. L. Yang
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  5. B. L. Dong
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Correspondence to S. B. Lin.

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Bai, J.Y., Fan, C.L., Lin, S.B. et al. Mechanical Properties and Fracture Behaviors of GTA-Additive Manufactured 2219-Al After an Especial Heat Treatment. J. of Materi Eng and Perform 26, 1808–1816 (2017). https://doi.org/10.1007/s11665-017-2627-5

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  • DOI: https://doi.org/10.1007/s11665-017-2627-5

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