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Influence mechanism of staggered distance on grain morphology evolution and texture state of AZ31 curved profile formed by staggered extrusion (SE)

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Abstract

There are some bottlenecks in the traditional lightweight curved forming manufacturing, such as long process flow, high cost, low efficiency, and large energy consumption. This is undoubtedly contrary to the development concept of green forming manufacturing, and the staggered extrusion rule is one of the effective ways to solve this problem. In this paper, the distribution characteristics of flow velocity on the cross section of extrusion die and its mapping relationship with the curvature change of curved material are analyzed by finite element simulation. The effects of different staggered distance h values on grain morphology, recrystallization behavior, and texture of AZ31 magnesium alloy extruded by staggered extrusion were studied by metallographic microscope and electron backscatter technology. The results show that the staggered extrusion method can promote the deep refinement of grain size of extruded products. When h = 16 mm, the average grain size is only 1/10 of the original billet, reaching 11.40 μm. At the same time, the recrystallization behavior is more fully, reaching 87.02%, and the texture strength is as low as 9.74, indicating that DRX is one of the main reasons for weakening texture. It provides scientific guidance and technical support for the formulation and industrial application of the magnesium alloy curved material staggered extrusion process scheme.

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The data obtained in the framework of this study are available to the journal upon request.

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Funding

This project is supported by the National Natural Science Foundation of China (No. 51975166).

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Authors and Affiliations

  1. School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, People’s Republic of China

    Zi Yu Chen, Feng Li, Peng Da Huo & Hua Qiu Du

  2. Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin, 150080, People’s Republic of China

    Feng Li

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  1. Zi Yu Chen
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  2. Feng Li
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Correspondence to Feng Li or Peng Da Huo.

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A hot research direction in plastic processing of extrusion curved profiles. The staggered extrusion proposed in this paper provides a new idea for the production of curved profiles.

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Chen, Z.Y., Li, F., Da Huo, P. et al. Influence mechanism of staggered distance on grain morphology evolution and texture state of AZ31 curved profile formed by staggered extrusion (SE). Int J Adv Manuf Technol 124, 197–207 (2023). https://doi.org/10.1007/s00170-022-10467-x

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  • DOI: https://doi.org/10.1007/s00170-022-10467-x

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