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Elevated temperature endurance and creep properties of extruded 2D70 Al alloy rods

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Abstract

The elevated temperature performances of 2D70 Al alloy hot extrusion rods after two-stage homogenization and intensive deformation were studied by measuring the elevated temperature enduring strength and the creep ultimate strength. The fracture morphology of some selected samples after testing at different elevated temperatures was observed by scanning electron microscopy (SEM). The results indicate that, as the test temperature increases, the elevated temperature enduring strength of 2D70 Al alloy decreases gradually. In a comparison between 150°C and 240°C, the notch enduring strength drops from 375 to 185 MPa and the smooth enduring strength drops from 337 to 130 MPa. Enduring strength is not sensitive to the notch. The notch sensitivity ratio (NSR) coefficient is in the range of 1.119 to 1.423 from 150°C to 240°C. The creep test results show that, as the test temperature increases from 150°C to 240°C, the creep ultimate strength of 2D70 Al alloy rods drops gradually from 312 to 117 MPa.

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Authors and Affiliations

  1. State Key Laboratory of Nonferrous Metals and Processes, General Research Institute for Nonferrous Metals, Beijing, 100088, China

    Guojun Wang, Baiqing Xiong, Yong’an Zhang & Zhihui Li

  2. Northeast Light Alloy Co. Ltd., Harbin, 150060, China

    Guojun Wang

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  1. Guojun Wang
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  2. Baiqing Xiong
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  3. Yong’an Zhang
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  4. Zhihui Li
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Correspondence to Guojun Wang.

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Wang, G., Xiong, B., Zhang, Y. et al. Elevated temperature endurance and creep properties of extruded 2D70 Al alloy rods. Rare Metals 30, 310–315 (2011). https://doi.org/10.1007/s12598-011-0389-z

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  • DOI: https://doi.org/10.1007/s12598-011-0389-z

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