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Effect of Zn/Mg/Cu Additions on Hot Cracking Tendency and Performances of Al-Cu-Mg-Zn Alloys for Liquid Forging

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Abstract

During the process of liquid forging, a host of hot cracking defects were found in the Al-Cu-Mg-Zn aluminum alloy. Therefore, mechanical tests and analyses by optical microscope, scanning electron microscope, and X-ray diffraction were performed to research the influences of zinc, magnesium, and copper (three main alloying elements) on hot cracking tendency and mechanical properties. It was concluded that all the three alloying elements exerted different effects on the performances of newly designed alloys. And the impact of microstructures on properties of alloys was stronger than that of solution strengthening. Among new alloys, Al-5Cu-4.5Mg-2.5Zn alloy shows better properties as follows: σb=327 MPa, δ=2.7%, HB=107 N/mm2, and HCS=40.

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Authors and Affiliations

  1. National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin, 150001, China

    Yonggen Sun  (孙永根) & Zhiming Du  (杜之明)

  2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China

    Yanni Su, Yuansheng Cheng & Yongwang Liu

Authors
  1. Yonggen Sun  (孙永根)
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  2. Zhiming Du  (杜之明)
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  3. Yanni Su
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  4. Yuansheng Cheng
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  5. Yongwang Liu
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Corresponding author

Correspondence to Zhiming Du  (杜之明).

Additional information

Funded by the International Cooperation Project of the Ministry of Science and Technology of China (No. 2014DFR50320) and the National Natural Science Foundation of China (No. 51174064)

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Sun, Y., Du, Z., Su, Y. et al. Effect of Zn/Mg/Cu Additions on Hot Cracking Tendency and Performances of Al-Cu-Mg-Zn Alloys for Liquid Forging. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 35, 176–182 (2020). https://doi.org/10.1007/s11595-020-2241-5

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  • DOI: https://doi.org/10.1007/s11595-020-2241-5

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