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Improvement of edge crack damage of magnesium alloy by optimizing the edge curve during cross variable thickness rolling

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Abstract

According to the MAS rolling and cross rolling theory, the hot rolling experiments were carried out on the AZ31 magnesium alloy specimens at the initial rolling temperature of 350 °C, and the grain distribution and edge damage of the strip after rolling by a controlled rolling reduction in different regions were analyzed. Meanwhile, the edge curves were designed to improve the edge crack and grain refinement of magnesium alloy during cross variable thickness rolling. The results indicated that the variable thickness rolling with the edge curve could effectively reduce the edge crack of magnesium alloy. The results also indicated that different edge curves could produce varying degrees of grain refinement at the strip edge and realize the ideal grain refinement in different regions during the rolling process; meanwhile, the optimization of the edge curve during cross variable thickness rolling could provide a theoretical basis for improving the magnesium alloy edge crack.

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Data Availability

The authors confirm that the data and material supporting the findings of this work are available within the article.

Abbreviations

σ p :

The peak stress at a certain temperature and strain rate

\( \overline{\sigma} \) :

Equivalent stress

\( \overline{\varepsilon} \) :

Equivalent strain

ε f :

Strain at break

\( \mathrm{d}\overline{\varepsilon } \) :

Equivalent strain increment

C :

Critical damage value

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Funding

This study was financially supported by the National Natural Science Foundation of China (No.52005358), the Natural Science Foundation of Shanxi Province (No.201901D111243), Shanxi Province Science and Technology Major Projects (No.20181102015), and the Natural Science Foundation of Liaoning Province(No. 2019-KF-25-05).

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Authors and Affiliations

  1. School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan, 030024, Shanxi, People’s Republic of China

    Ya-Feng Ji, Jin-Rui Duan, Hua-Ying Li & Li-Feng Ma

  2. College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, People’s Republic of China

    Yuan-Ming Liu

  3. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, Liaoning, People’s Republic of China

    Wen Peng

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  1. Ya-Feng Ji
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  2. Jin-Rui Duan
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  3. Hua-Ying Li
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  4. Yuan-Ming Liu
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  5. Wen Peng
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  6. Li-Feng Ma
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Contributions

Experimentation: Ya-Feng Ji, Jin-Rui Duan; numerical modeling: Jin-Rui Duan, Hua-Ying Li; writing (original draft preparation): Jin-Rui Duan; writing (review and editing): Ya-Feng Ji, Yuan-Ming Liu, Wen Peng; coordination: Li-Feng Ma.

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Correspondence to Li-Feng Ma.

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Ji, YF., Duan, JR., Li, HY. et al. Improvement of edge crack damage of magnesium alloy by optimizing the edge curve during cross variable thickness rolling. Int J Adv Manuf Technol 112, 1993–2002 (2021). https://doi.org/10.1007/s00170-020-06517-x

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