【正文】 sis. A fouroperation stamping process was developed to eliminate both the fracture and wrinkle defects occurred in the stamping process of the top cover case. In order to validate the finite element analysis, an actual fouroperation stamping process was 7 conducted with the use of mm thick LZ91 sheet as the blank. A good agreement in the thickness distribution at various locations between the experimental data and the finite element results confirmed the accuracy and efficiency of the finite element analysis. The superior formability of LZ91 sheet at room temperature was also demonstrated in the present study by successful manufacturing of the notebook top cover case. The proposed fouroperation process lends itself to an efficient approach to form the hinge in the notebook with less number of operational procedures than that required in the current practice. It also confirms that the notebook cover cases can be produced with LZ91 magnesium alloy sheet by the stamping process. It provides an alternative to the electronics industry in the application of magnesium alloys. Keywords ? Notebook case。C. It is noted that the stress–strain curve tends to be lower as the content of lithium increases. It is also observed from Fig. 2(a) that the curves of LZ91 sheet at room temperature and AZ31 sheet at 200 176。C. The superior formability of LZ91 sheet at room temperature was also demonstrated in the present study by successful manufacturing of the notebook top cover case. The proposed fouroperation process lends itself to an efficient approach to form the hinge in the notebook with fewer operational procedures than that required in the current practice. 14 It also confirms that the notebook cover cases can be produced with LZ91 magnesium alloy LZ91 sheet by the stamping process. It provides an alternative to the electronics industry in the application of magnesium alloys. Acknowledgments The authors would like to thank the National Science Council of the Republic of China for financially supporting this research under the Project No. NSC952622E002019CC3, which made this research possible. They would also like to thank ESI, France for the help in running the PAM_STAMP program. References 1. o Chen and Huang, 2020 o . Chen, . Huang o Formability of stamping magnesiumalloy AZ31 sheets o J. Mater. Process. Technol., 142 (2020), pp. 643–647 o 2. o Chen et al., 2020 o . Chen, . Huang, . Chang o Deep drawing of square cups with magnesium alloy AZ31 sheets o Int. J. Mach. Tools Manuf., 43 (2020), pp. 1553–1559 o 3. o Drozd et al., 2020 o Z. Drozd, Z. Trojanov225。 Design Constitutive modeling for anisotropic/asymme... International Journal of Plasticity Improvement of ductility in magnesium alloy ... Materials Letters Simulation of magnesium alloy AZ31 sheet dur... Computational Materials Science Finite element simulation of magnesium alloy... Journal of Materials Processing Technology View more related articles Cited by (9) Quick gas blow forming behavior of AZ31B mag... Zhongguo Youse Jinshu Xuebao/Chinese Journal... Influence of cutting speed on flank temperat... Materials and Manufacturing Processes Influence of environmentally friendly electr... Zhongguo Youse Jinshu Xuebao/Chinese Journal... View details of all 9 citing articles in Scopus Provided by Scopus Related reference work articles . encyclopedias 16 Sintering: Modeling Encyclopedia of Materials: Science and Techn... Computational Modeling of Concrete St... Comprehensive Structural Integrity Finite Element Analysis in Bone Rese... Comprehensive Biomaterials Hard Tissues, Mechanical Properties of Encyclopedia of Materials: Science and Techn... NDT: Support by Modeling Encyclopedia of Materials: Science and Techn... More related reference work articles View Record in Scopus