Simultaneous achievement of high strength and large elongation in extruded Mg/LPSO alloys via the anisotropic mechanical property-induced ductilization (AMID) mechanism
We discovered two distinctive features in the mechanical properties of extruded Mg alloys containing a long-period stacking ordered (LPSO) phase, which are highly desirable for a new class of high-strength, lightweight materials. First, the Mg/LPSO-extruded alloy shows greater elongation compared to...
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KeAi Communications Co., Ltd.
2025-05-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221395672500091X |
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| author | Koji Hagihara Tsuyoshi Mayama Michiaki Yamasaki Toko Tokunaga Mika Sugita Soya Nishimoto Kazuki Yamamoto Kanato Umemura |
| author_facet | Koji Hagihara Tsuyoshi Mayama Michiaki Yamasaki Toko Tokunaga Mika Sugita Soya Nishimoto Kazuki Yamamoto Kanato Umemura |
| author_sort | Koji Hagihara |
| collection | DOAJ |
| description | We discovered two distinctive features in the mechanical properties of extruded Mg alloys containing a long-period stacking ordered (LPSO) phase, which are highly desirable for a new class of high-strength, lightweight materials. First, the Mg/LPSO-extruded alloy shows greater elongation compared to other Mg solid-solution-extruded alloys when a certain high strength is required. Second, the simultaneous achievement of high strength and large elongation in the Mg/LPSO-extruded alloy enhances with a reduction in extrusion speed. In this study, the physical origins of these features were examined, focusing on how changes in the microstructure affect the mechanical properties of the extruded alloys. Our findings clarify that the LPSO phase contributes not only to increased strength but also to enhanced elongation through an increase in the work-hardening rate, a mechanism we termed “anisotropic mechanical property-induced ductilization” (AMID). Until now, most efforts to improve the ductility of Mg materials have focused on achieving “isotropic mechanical properties” via grain refinement. Based on our results, we propose an entirely opposite approach: increasing the elongation of Mg alloy by locally enhancing their “anisotropic mechanical properties” through the AMID mechanism. Computational analysis further suggests that reducing the diameter of Mg-worked grains should effectively improving elongation in Mg/LPSO alloys with a high volume fraction of Mg-worked grains. |
| format | Article |
| id | doaj-art-415d95e5c8fd4eb3a9374be6d4a193b5 |
| institution | DOAJ |
| issn | 2213-9567 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-415d95e5c8fd4eb3a9374be6d4a193b52025-08-20T02:40:29ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672025-05-011352049207110.1016/j.jma.2025.03.003Simultaneous achievement of high strength and large elongation in extruded Mg/LPSO alloys via the anisotropic mechanical property-induced ductilization (AMID) mechanismKoji Hagihara0Tsuyoshi Mayama1Michiaki Yamasaki2Toko Tokunaga3Mika Sugita4Soya Nishimoto5Kazuki Yamamoto6Kanato Umemura7Department of Physical Science and Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Aichi, 466-8555, Japan; Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan; Corresponding author.Magnesium Research Center & Department of Materials Science, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, JapanMagnesium Research Center & Department of Materials Science, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, JapanDepartment of Physical Science and Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Aichi, 466-8555, JapanDepartment of Physical Science and Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Aichi, 466-8555, JapanMagnesium Research Center & Department of Materials Science, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, JapanDepartment of Physical Science and Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Aichi, 466-8555, JapanDepartment of Physical Science and Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Aichi, 466-8555, JapanWe discovered two distinctive features in the mechanical properties of extruded Mg alloys containing a long-period stacking ordered (LPSO) phase, which are highly desirable for a new class of high-strength, lightweight materials. First, the Mg/LPSO-extruded alloy shows greater elongation compared to other Mg solid-solution-extruded alloys when a certain high strength is required. Second, the simultaneous achievement of high strength and large elongation in the Mg/LPSO-extruded alloy enhances with a reduction in extrusion speed. In this study, the physical origins of these features were examined, focusing on how changes in the microstructure affect the mechanical properties of the extruded alloys. Our findings clarify that the LPSO phase contributes not only to increased strength but also to enhanced elongation through an increase in the work-hardening rate, a mechanism we termed “anisotropic mechanical property-induced ductilization” (AMID). Until now, most efforts to improve the ductility of Mg materials have focused on achieving “isotropic mechanical properties” via grain refinement. Based on our results, we propose an entirely opposite approach: increasing the elongation of Mg alloy by locally enhancing their “anisotropic mechanical properties” through the AMID mechanism. Computational analysis further suggests that reducing the diameter of Mg-worked grains should effectively improving elongation in Mg/LPSO alloys with a high volume fraction of Mg-worked grains.http://www.sciencedirect.com/science/article/pii/S221395672500091XMg alloyLpso-phaseWork-hardening rateAnisotropic mechanical property-induced ductilization (amid)Elongation |
| spellingShingle | Koji Hagihara Tsuyoshi Mayama Michiaki Yamasaki Toko Tokunaga Mika Sugita Soya Nishimoto Kazuki Yamamoto Kanato Umemura Simultaneous achievement of high strength and large elongation in extruded Mg/LPSO alloys via the anisotropic mechanical property-induced ductilization (AMID) mechanism Journal of Magnesium and Alloys Mg alloy Lpso-phase Work-hardening rate Anisotropic mechanical property-induced ductilization (amid) Elongation |
| title | Simultaneous achievement of high strength and large elongation in extruded Mg/LPSO alloys via the anisotropic mechanical property-induced ductilization (AMID) mechanism |
| title_full | Simultaneous achievement of high strength and large elongation in extruded Mg/LPSO alloys via the anisotropic mechanical property-induced ductilization (AMID) mechanism |
| title_fullStr | Simultaneous achievement of high strength and large elongation in extruded Mg/LPSO alloys via the anisotropic mechanical property-induced ductilization (AMID) mechanism |
| title_full_unstemmed | Simultaneous achievement of high strength and large elongation in extruded Mg/LPSO alloys via the anisotropic mechanical property-induced ductilization (AMID) mechanism |
| title_short | Simultaneous achievement of high strength and large elongation in extruded Mg/LPSO alloys via the anisotropic mechanical property-induced ductilization (AMID) mechanism |
| title_sort | simultaneous achievement of high strength and large elongation in extruded mg lpso alloys via the anisotropic mechanical property induced ductilization amid mechanism |
| topic | Mg alloy Lpso-phase Work-hardening rate Anisotropic mechanical property-induced ductilization (amid) Elongation |
| url | http://www.sciencedirect.com/science/article/pii/S221395672500091X |
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