Pub Date : 2026-01-16DOI: 10.1016/j.jma.2025.101975
Dong Li, Tong Zhang, Shaosheng Jia, Jianan Yu, Rongbang Sun, Bin Yin, Liguo Wang, Lingchuang Bai, Lan Chen, Shaokang Guan
{"title":"NIR/TME-responsive release of zoledronic acid-loaded LDHs on ZE21C magnesium alloy with multi-therapy for osteosarcoma","authors":"Dong Li, Tong Zhang, Shaosheng Jia, Jianan Yu, Rongbang Sun, Bin Yin, Liguo Wang, Lingchuang Bai, Lan Chen, Shaokang Guan","doi":"10.1016/j.jma.2025.101975","DOIUrl":"https://doi.org/10.1016/j.jma.2025.101975","url":null,"abstract":"","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"23 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-03DOI: 10.1016/j.jma.2025.10.003
Yun Feng, Muhammad Abubaker Khan, Han Wang, Didi Zhao, Shang Dai, Jingyuan Li
{"title":"Synergistic improvement of corrosion-strength of Mg-Zn-Ca-Sn dilute alloys by adjusting the Sn/Ca atomic ratio","authors":"Yun Feng, Muhammad Abubaker Khan, Han Wang, Didi Zhao, Shang Dai, Jingyuan Li","doi":"10.1016/j.jma.2025.10.003","DOIUrl":"https://doi.org/10.1016/j.jma.2025.10.003","url":null,"abstract":"","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"10 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145895465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-16DOI: 10.1016/j.jma.2025.11.013
Hee-Tae Jeong, Woo Jin Kim
Ultrathin metallic foils deform under plane-stress conditions, where the absence of through-thickness constraint and a low thickness-to-grain-size ratio (t/d) promote early necking and severely limit uniform elongation. Here, we demonstrate that high-ratio differential speed rolling (HRDSR) mitigates these geometric limitations in Mg–10Li alloy foils by refining grains to the nearly ultrafine regime, thereby increasing t/d and activating grain-boundary–mediated deformation. Foils 100 μm thick with grain sizes of 1.1 μm (t/d ≈ 91) exhibit elongations exceeding 30 % at 10−5 s−1, whereas coarse-grained counterparts (29.4 μm, t/d ≈ 3.4) of the same thickness fail abruptly with < 1 % uniform strain under identical conditions. Micro-pattern formability tests confirm homogeneous deformation and high surface fidelity in ultrafine-grained foils, in sharp contrast to severe strain localization and pattern collapse in coarse-grained samples. Strain-rate jump tests on the ultrafine-grained foils reveal an elevated strain-rate sensitivity (m ≈ 0.23) and low activation volumes (15–30 b3) at low strain-rates, suggesting that deformation is governed by a combined contribution of grain boundary sliding (GBS) and dislocation climb creep (DCC). A unified constitutive framework captures the transition from DCC at moderate strain-rates to GBS at low rates. The present findings demonstrate that refining Mg–Li alloys to a quasi-ultrafine-grained regime effectively overcomes the intrinsic ductility limitations imposed by plane-stress geometry, thereby enabling their practical application in flexible electronics, bioresorbable implants, and lightweight energy-storage systems.
{"title":"Overcoming geometric embrittlement in Mg–Li foils through grain refinement and grain-boundary–mediated deformation","authors":"Hee-Tae Jeong, Woo Jin Kim","doi":"10.1016/j.jma.2025.11.013","DOIUrl":"https://doi.org/10.1016/j.jma.2025.11.013","url":null,"abstract":"Ultrathin metallic foils deform under plane-stress conditions, where the absence of through-thickness constraint and a low thickness-to-grain-size ratio (<em>t/d</em>) promote early necking and severely limit uniform elongation. Here, we demonstrate that high-ratio differential speed rolling (HRDSR) mitigates these geometric limitations in Mg–10Li alloy foils by refining grains to the nearly ultrafine regime, thereby increasing <em>t</em>/<em>d</em> and activating grain-boundary–mediated deformation. Foils 100 μm thick with grain sizes of 1.1 μm (<em>t</em>/<em>d</em> ≈ 91) exhibit elongations exceeding 30 % at 10<sup>−5</sup> s<sup>−1</sup>, whereas coarse-grained counterparts (29.4 μm, <em>t</em>/<em>d</em> ≈ 3.4) of the same thickness fail abruptly with < 1 % uniform strain under identical conditions. Micro-pattern formability tests confirm homogeneous deformation and high surface fidelity in ultrafine-grained foils, in sharp contrast to severe strain localization and pattern collapse in coarse-grained samples. Strain-rate jump tests on the ultrafine-grained foils reveal an elevated strain-rate sensitivity (<em>m</em> ≈ 0.23) and low activation volumes (15–30 <em>b</em><sup>3</sup>) at low strain-rates, suggesting that deformation is governed by a combined contribution of grain boundary sliding (GBS) and dislocation climb creep (DCC). A unified constitutive framework captures the transition from DCC at moderate strain-rates to GBS at low rates. The present findings demonstrate that refining Mg–Li alloys to a quasi-ultrafine-grained regime effectively overcomes the intrinsic ductility limitations imposed by plane-stress geometry, thereby enabling their practical application in flexible electronics, bioresorbable implants, and lightweight energy-storage systems.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"143 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145771323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-13DOI: 10.1016/j.jma.2025.11.015
Y. Yue, H.Y. Song, Jian Wang, J.F. Nie
We conducted molecular dynamics simulations to study the interactions between a migrating <span><span style=""></span><span data-mathml='<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow is="true"><mo is="true">{</mo><mrow is="true"><mn is="true">10</mn><mover accent="true" is="true"><mn is="true">1</mn><mo is="true">¯</mo></mover><mn is="true">1</mn></mrow><mo is="true">}</mo></mrow></math>' role="presentation" style="font-size: 90%; display: inline-block; position: relative;" tabindex="0"><svg aria-hidden="true" focusable="false" height="2.779ex" role="img" style="vertical-align: -0.812ex;" viewbox="0 -846.5 3073 1196.3" width="7.137ex" xmlns:xlink="http://www.w3.org/1999/xlink"><g fill="currentColor" stroke="currentColor" stroke-width="0" transform="matrix(1 0 0 -1 0 0)"><g is="true"><use is="true" xlink:href="#MJMAIN-7B"></use><g is="true" transform="translate(500,0)"><g is="true"><use xlink:href="#MJMAIN-31"></use><use x="500" xlink:href="#MJMAIN-30" y="0"></use></g><g is="true" transform="translate(1001,0)"><g is="true" transform="translate(35,0)"><use xlink:href="#MJMAIN-31"></use></g><g is="true" transform="translate(0,198)"><use x="-70" xlink:href="#MJMAIN-AF" y="0"></use><use x="70" xlink:href="#MJMAIN-AF" y="0"></use></g></g><g is="true" transform="translate(1571,0)"><use xlink:href="#MJMAIN-31"></use></g></g><use is="true" x="2572" xlink:href="#MJMAIN-7D" y="0"></use></g></g></svg><span role="presentation"><math xmlns="http://www.w3.org/1998/Math/MathML"><mrow is="true"><mo is="true">{</mo><mrow is="true"><mn is="true">10</mn><mover accent="true" is="true"><mn is="true">1</mn><mo is="true">¯</mo></mover><mn is="true">1</mn></mrow><mo is="true">}</mo></mrow></math></span></span><script type="math/mml"><math><mrow is="true"><mo is="true">{</mo><mrow is="true"><mn is="true">10</mn><mover accent="true" is="true"><mn is="true">1</mn><mo is="true">¯</mo></mover><mn is="true">1</mn></mrow><mo is="true">}</mo></mrow></math></script></span> twin boundary (TB) and prismatic 〈 <em>c</em> 〉 and 〈 <em>c</em> <em>+</em> <em>a</em> 〉 dislocations in magnesium. In the simulations, the 〈 <em>c</em> <em>+</em> <em>a</em> 〉 dislocation comprises 〈 <em>c</em> 〉 edge and 〈 <em>a</em> 〉 screw components. Both of these 〈 <em>c</em> 〉 and 〈 <em>c</em> <em>+</em> <em>a</em> 〉 dislocations are observed to exhibit a dissociated core comprising two partial dislocations. Upon interaction with a <span><span style=""></span><span data-mathml='<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow is="true"><mo is="true">(</mo><mrow is="true"><mn is="true">10</mn><mover accent="true" is="true"><mn is="true">1</mn><mo is="true">¯</mo></mover><mn is="true">1</mn></mrow><mo is="true">)</mo></mrow></math>' role=
我们通过分子动力学模拟研究了迁移{101¯1}{101¯1}孪晶界(TB)与镁中棱柱形< c >和< c + a >位错之间的相互作用。在模拟中,< c + a >位错由< c >边和< a >螺杆组成。这两种< c >和< c + a >位错都被观察到表现出由两个部分位错组成的解离核心。在与(101¯1)(101¯1)TB相互作用时,这些部分固定TB并驻留在金字塔-基底(PyB)或基底-金字塔(BPy)孪生界面上。结果发现,在(101¯1)(101¯1)孪晶内部,其中一个偏位转变为基底< a >位错,另一个偏位转变为孪晶内部的Frank偏位错,并与TB上的单原子层高度断裂相连接。基底< a >位错有其延伸的核心,由两个肖克利部分位错包围。模拟结果表明,当90°Shockley位错靠近TB时,完整的< a >位错容易分离。相反,当30°Shockley靠近TB时,< a >与TB连接,并与TB同步迁移。观察到,< a >与(101¯1)(101¯1)TB的连接导致了包含I2故障的结构,其一端通过30°Shockley部分位错与TB上的两原子层高度断开连接。进一步研究表明,当连接I2的剪切方向指向TB时,这种双原子层高断裂的立管面平行于PyB界面,而当连接I2的剪切方向远离TB时,其立管面平行于BPy界面。
{"title":"Interactions between a migrating {101¯1} twin boundary and a 〈 c 〉 or 〈 c + a 〉 dislocation in magnesium","authors":"Y. Yue, H.Y. Song, Jian Wang, J.F. Nie","doi":"10.1016/j.jma.2025.11.015","DOIUrl":"https://doi.org/10.1016/j.jma.2025.11.015","url":null,"abstract":"We conducted molecular dynamics simulations to study the interactions between a migrating <span><span style=\"\"></span><span data-mathml='<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow is=\"true\"><mo is=\"true\">{</mo><mrow is=\"true\"><mn is=\"true\">10</mn><mover accent=\"true\" is=\"true\"><mn is=\"true\">1</mn><mo is=\"true\">&#xAF;</mo></mover><mn is=\"true\">1</mn></mrow><mo is=\"true\">}</mo></mrow></math>' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"2.779ex\" role=\"img\" style=\"vertical-align: -0.812ex;\" viewbox=\"0 -846.5 3073 1196.3\" width=\"7.137ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"><g is=\"true\"><use is=\"true\" xlink:href=\"#MJMAIN-7B\"></use><g is=\"true\" transform=\"translate(500,0)\"><g is=\"true\"><use xlink:href=\"#MJMAIN-31\"></use><use x=\"500\" xlink:href=\"#MJMAIN-30\" y=\"0\"></use></g><g is=\"true\" transform=\"translate(1001,0)\"><g is=\"true\" transform=\"translate(35,0)\"><use xlink:href=\"#MJMAIN-31\"></use></g><g is=\"true\" transform=\"translate(0,198)\"><use x=\"-70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use><use x=\"70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use></g></g><g is=\"true\" transform=\"translate(1571,0)\"><use xlink:href=\"#MJMAIN-31\"></use></g></g><use is=\"true\" x=\"2572\" xlink:href=\"#MJMAIN-7D\" y=\"0\"></use></g></g></svg><span role=\"presentation\"><math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow is=\"true\"><mo is=\"true\">{</mo><mrow is=\"true\"><mn is=\"true\">10</mn><mover accent=\"true\" is=\"true\"><mn is=\"true\">1</mn><mo is=\"true\">¯</mo></mover><mn is=\"true\">1</mn></mrow><mo is=\"true\">}</mo></mrow></math></span></span><script type=\"math/mml\"><math><mrow is=\"true\"><mo is=\"true\">{</mo><mrow is=\"true\"><mn is=\"true\">10</mn><mover accent=\"true\" is=\"true\"><mn is=\"true\">1</mn><mo is=\"true\">¯</mo></mover><mn is=\"true\">1</mn></mrow><mo is=\"true\">}</mo></mrow></math></script></span> twin boundary (TB) and prismatic 〈 <em>c</em> 〉 and 〈 <em>c</em> <em>+</em> <em>a</em> 〉 dislocations in magnesium. In the simulations, the 〈 <em>c</em> <em>+</em> <em>a</em> 〉 dislocation comprises 〈 <em>c</em> 〉 edge and 〈 <em>a</em> 〉 screw components. Both of these 〈 <em>c</em> 〉 and 〈 <em>c</em> <em>+</em> <em>a</em> 〉 dislocations are observed to exhibit a dissociated core comprising two partial dislocations. Upon interaction with a <span><span style=\"\"></span><span data-mathml='<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow is=\"true\"><mo is=\"true\">(</mo><mrow is=\"true\"><mn is=\"true\">10</mn><mover accent=\"true\" is=\"true\"><mn is=\"true\">1</mn><mo is=\"true\">&#xAF;</mo></mover><mn is=\"true\">1</mn></mrow><mo is=\"true\">)</mo></mrow></math>' role=","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"19 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145753081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-13DOI: 10.1016/j.jma.2025.11.008
Xun Chen, Yuan Yuan, Xiwei Zhou, Tao Chen, Aitao Tang, Xianhua Chen, Jun Tan, Nele Moelans, Jürgen Eckert, Fusheng Pan
{"title":"Harnessing the power of α-Mg: Unveiling the matrix phase’s role in Mg alloys from structure to function","authors":"Xun Chen, Yuan Yuan, Xiwei Zhou, Tao Chen, Aitao Tang, Xianhua Chen, Jun Tan, Nele Moelans, Jürgen Eckert, Fusheng Pan","doi":"10.1016/j.jma.2025.11.008","DOIUrl":"https://doi.org/10.1016/j.jma.2025.11.008","url":null,"abstract":"","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"143 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145730791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-12DOI: 10.1016/j.jma.2025.11.009
Lingxiao Wang, Xiaoya Chen, Quanan Li, Zheng Wu, Yuefei Dai, Zeyu Zheng, Kang Yao
Among existing lightweight metals, magnesium (Mg) alloys have garnered significant attention due to their exceptional specific strength. However, their laser welding applications face challenges from porosity, cracking, and grain coarsening defects. Rare earth (RE) elements, leveraging their unique strengthening effects, offer a promising solution for refining weld microstructures and suppressing welding defects. Nevertheless, a systematic review of RE-enhanced mechanisms and defect suppression strategies remains lacking. This paper systematically reviews recent research advancements in Mg alloy laser welding, with a focused elucidation of the governing effects of welding parameters on weld performance, and the core mechanistic roles of RE elements in the welded joint. Furthermore, we discuss key challenges and future directions in process optimization, service performance enhancement, and industrial scalability of RE-modified Mg alloy welding. The findings aim to provide theoretical foundations for designing high-performance welded Mg-RE structures and advance lightweight manufacturing technologies in aerospace, electric vehicles, and other cutting-edge industries.
{"title":"The influence of RE elements on the performance of laser welded joints of magnesium alloys: A review","authors":"Lingxiao Wang, Xiaoya Chen, Quanan Li, Zheng Wu, Yuefei Dai, Zeyu Zheng, Kang Yao","doi":"10.1016/j.jma.2025.11.009","DOIUrl":"https://doi.org/10.1016/j.jma.2025.11.009","url":null,"abstract":"Among existing lightweight metals, magnesium (Mg) alloys have garnered significant attention due to their exceptional specific strength. However, their laser welding applications face challenges from porosity, cracking, and grain coarsening defects. Rare earth (RE) elements, leveraging their unique strengthening effects, offer a promising solution for refining weld microstructures and suppressing welding defects. Nevertheless, a systematic review of RE-enhanced mechanisms and defect suppression strategies remains lacking. This paper systematically reviews recent research advancements in Mg alloy laser welding, with a focused elucidation of the governing effects of welding parameters on weld performance, and the core mechanistic roles of RE elements in the welded joint. Furthermore, we discuss key challenges and future directions in process optimization, service performance enhancement, and industrial scalability of RE-modified Mg alloy welding. The findings aim to provide theoretical foundations for designing high-performance welded Mg-RE structures and advance lightweight manufacturing technologies in aerospace, electric vehicles, and other cutting-edge industries.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"2 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145728933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Atomic-scale modeling of defects in magnesium and its alloys: A review","authors":"Zhuocheng Xie, Julien Guénolé, Hexin Wang, Joé Petrazoller, Fatim-Zahra Mouhib, Antoine Guitton, Thiebaud Richeton, Stéphane Berbenni, Talal Al-Samman","doi":"10.1016/j.jma.2025.11.014","DOIUrl":"https://doi.org/10.1016/j.jma.2025.11.014","url":null,"abstract":"","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"29 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145730808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-11DOI: 10.1016/j.jma.2025.11.012
Koji Hagihara, Shuhei Ohsawa, Toko Tokunaga, Muhammadsanim Tsunekawa
{"title":"Orientation dependence of extremely high strength in Mg-Li-Zn single crystals","authors":"Koji Hagihara, Shuhei Ohsawa, Toko Tokunaga, Muhammadsanim Tsunekawa","doi":"10.1016/j.jma.2025.11.012","DOIUrl":"https://doi.org/10.1016/j.jma.2025.11.012","url":null,"abstract":"","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"9 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145730807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-11DOI: 10.1016/j.jma.2025.11.006
Qing Xiang, Jingxiong Zeng, Bo Qiao
{"title":"Multifunctional hydrophobic/superhydrophobic protective coatings for magnesium alloys: A review on material design, protection mechanisms, and engineering applications","authors":"Qing Xiang, Jingxiong Zeng, Bo Qiao","doi":"10.1016/j.jma.2025.11.006","DOIUrl":"https://doi.org/10.1016/j.jma.2025.11.006","url":null,"abstract":"","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"227 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145730806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this research, thixomolding was conducted to thixoform complex AZ91D magnesium alloy laptop shell with ultra-thin wall thickness of 0.6 mm and lightweight of 192 g. Subsequently, unique heat treatment process (i.e., low temperature and short time solution and artificial aging) was proposed to achieve collaborative enhancement of strength and ductility. Thixomolding process guaranteed exceptional surface quality, preeminent dimensional accuracy, dense microstructure, excellent grain refinement and adequate filling of laptop shell due to high pressure and sub-rapid solidification. The optimal parameter including 380 °C-0.5 h solution and 180 °C-4 h aging was obtained via single variable experiments. Consequently, the distinguished mechanical properties of 351 MPa (ultimate tensile strength), 201 MPa (yield strength) and 7.2 % (elongation) were achieved, realizing comprehensive improvement of 24.0 %, 8.6 % and 157 %, respectively, compared to without heat treatment. In thixomolding process, the second phases caused mixed fracture dominated by brittle fracture. With optimal solution treatment, the second phases dissolved and realized completely ductile fracture. After aging treatment, the nano precipitates were dispersed uniformly in the α-Mg matrix and transformed into mixed fracture dominated by ductile fracture. Nanoscale phases of β-Mg17Al12, Mg16Al12Zn and Al8Mn5 dispersed precipitation within the matrix after unique heat treatment, cooperated with dislocations and twins to jointly strengthen the laptop shell. The calculated contributions of precipitate phases strengthening, grain refining strengthening, dislocation strengthening, and texture strengthening were 41.3 %, 34.4 %, 16.3 % and 8.0 %, respectively. This paper provided new alternative for ultra-thin-walled lightweight magnesium alloy products, achieving the breakthrough for AZ91D alloy in mechanical properties.
{"title":"Enhancement of unique heat treatment process on microstructure and mechanical properties of thixomolded complex lightweight AZ91D magnesium alloy laptop shell with ultra-thin wall thickness","authors":"Jingbo Cui, Jufu Jiang, Ying Wang, Jinze Zhang, Jian Dong, Xiaodong Zhang, Lingbo Kong, Weirong Li, Chunhua Li","doi":"10.1016/j.jma.2025.11.016","DOIUrl":"https://doi.org/10.1016/j.jma.2025.11.016","url":null,"abstract":"In this research, thixomolding was conducted to thixoform complex AZ91D magnesium alloy laptop shell with ultra-thin wall thickness of 0.6 mm and lightweight of 192 g. Subsequently, unique heat treatment process (i.e., low temperature and short time solution and artificial aging) was proposed to achieve collaborative enhancement of strength and ductility. Thixomolding process guaranteed exceptional surface quality, preeminent dimensional accuracy, dense microstructure, excellent grain refinement and adequate filling of laptop shell due to high pressure and sub-rapid solidification. The optimal parameter including 380 °C-0.5 h solution and 180 °C-4 h aging was obtained via single variable experiments. Consequently, the distinguished mechanical properties of 351 MPa (ultimate tensile strength), 201 MPa (yield strength) and 7.2 % (elongation) were achieved, realizing comprehensive improvement of 24.0 %, 8.6 % and 157 %, respectively, compared to without heat treatment. In thixomolding process, the second phases caused mixed fracture dominated by brittle fracture. With optimal solution treatment, the second phases dissolved and realized completely ductile fracture. After aging treatment, the nano precipitates were dispersed uniformly in the α-Mg matrix and transformed into mixed fracture dominated by ductile fracture. Nanoscale phases of β-Mg<ce:inf loc=\"post\">17</ce:inf>Al<ce:inf loc=\"post\">12</ce:inf>, Mg<ce:inf loc=\"post\">16</ce:inf>Al<ce:inf loc=\"post\">12</ce:inf>Zn and Al<ce:inf loc=\"post\">8</ce:inf>Mn<ce:inf loc=\"post\">5</ce:inf> dispersed precipitation within the matrix after unique heat treatment, cooperated with dislocations and twins to jointly strengthen the laptop shell. The calculated contributions of precipitate phases strengthening, grain refining strengthening, dislocation strengthening, and texture strengthening were 41.3 %, 34.4 %, 16.3 % and 8.0 %, respectively. This paper provided new alternative for ultra-thin-walled lightweight magnesium alloy products, achieving the breakthrough for AZ91D alloy in mechanical properties.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"15 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145704930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}