Journal of Magnesium and Alloys最新文献

{"title":"Unveiling cold cracking and grain refinement mechanisms governed by alloy composition in additive manufacturing of high-strength Mg-Gd(-Zn)-Zr alloys","authors":"Qingchen Deng,&nbsp;Lu Wang,&nbsp;Fan Chen,&nbsp;Erlei Li,&nbsp;Ziyi Liu,&nbsp;Wencan Wang,&nbsp;Hua Wang,&nbsp;Yujuan Wu,&nbsp;Liming Peng,&nbsp;Wenjiang Ding,&nbsp;Wentao Yan","doi":"10.1016/j.jma.2026.102090","DOIUrl":"10.1016/j.jma.2026.102090","url":null,"abstract":"<div><div>Additive manufacturing (AM) of Mg alloy components with intricate geometries has garnered increasing interest for achieving lightweight structure and material simultaneously. However, cracking and coarse-grained microstructure remain critical challenges, severely compromising the strength and ductility of the as-built Mg alloys. Here we leverage multi-scale experimental characterizations and high-fidelity simulations of melt pool dynamics and thermal stresses to understand the crucial role of alloy composition in mitigating cold cracking, enhancing grain refinement and improving mechanical properties in AM of Mg-Gd(-Zn)-Zr alloys, aiming to establish comprehensive alloy composition design guidelines. We uncover an unusual paradox between reducing cold cracking susceptibility and refining grains when tailoring the alloy compositions. The solidification growth restriction factor (<em>Q</em> value) plays a pivotal role in grain refinement through the constitutional supercooling effect, with a recommended <em>Q</em> value exceeding 32 K. Cold cracking occurs when accumulated solidification shrinkage and thermal contraction stresses surpass the ultimate tensile strength of the material. To quantitatively evaluate this, we introduce a novel cold cracking index (<em>CCI</em>) that incorporates the sample size, as well as the height and width of the first crack. Mg alloys with intrinsic properties such as high ductility, high thermal conductivity, and low thermal expansion coefficient are identified as more suitable for AM process to avoid cold cracking. These guidelines are validated by successful fabrication of Mg-11Gd-2Zn-0.3Zr (wt.%, GZ112K) alloy, which turns out to be cracking-resistant, fine-grained, and strength-ductility synergistic. This work provides deeper insights into the cold cracking and grain refinement mechanisms and presents AM design guidelines for Mg alloys with improved printability, microstructure and mechanical properties.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102090"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148949687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atomic simulation of bimodal microstructure in wrought Mg-Al-Zn-Ca-Mn alloy","authors":"Shudong He,&nbsp;Zhishun Chen,&nbsp;Zhihao Deng,&nbsp;Cong He,&nbsp;Hucheng Pan,&nbsp;Yuan Yue,&nbsp;Jie Hou,&nbsp;Shiwei Xu,&nbsp;Zhuoran Zeng","doi":"10.1016/j.jma.2026.102061","DOIUrl":"10.1016/j.jma.2026.102061","url":null,"abstract":"<div><div>Multiscale characterization and molecular dynamics (MD) simulations were combined to reveal a dynamically enhanced inhibition mechanism of static recrystallization (SRX) in Mg-Al-Zn-Ca alloys. Compared with the rapid and full SRX of Mg-3Al-1Zn-0.3Mn alloy, the recrystallized fraction increases rapidly at the early stage of SRX but then slows and stabilizes at ∼46% after annealing up to 30 min in a Mg-3Al-1Zn-1Ca-0.3Mn alloy. It is shown that Al₂Ca precipitates thicken from 1 to 4.3 nm during annealing, increasing their pinning stress on low-angle grain boundaries (LAGBs) by up to threefold and reducing LAGB energy by ∼45%. Increasing precipitate length from 3.9 to 17.6 nm further doubles the dragging effect. Even without precipitate growth, increasing the LAGB misorientation from 4° to 14° also triples the pinning stress. This study demonstrates that the dynamically enhanced retardation of SRX originates from precipitate growth and increasing LAGB misorientation during annealing.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102061"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148949756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ZE21B magnesium alloy coimmobilized with anti-inflammatory chemerin 15 peptide and pro-endothelialization fucoidan for enhanced vascular histocompatibility","authors":"Yunwei Gu,&nbsp;Qi Wang,&nbsp;Shaosheng Jia,&nbsp;Jianan Yu,&nbsp;Lan Chen,&nbsp;Lingchuang Bai,&nbsp;Shaokang Guan","doi":"10.1016/j.jma.2026.102121","DOIUrl":"10.1016/j.jma.2026.102121","url":null,"abstract":"<div><div>Magnesium alloy stents (MAS) show remarkable application potential for treating cardiovascular diseases, attributable to their superior mechanical properties and biodegradability. However, their clinical applications are significantly hindered by inadequate corrosion resistance and suboptimal blood compatibility. In this study, a multilayer coating was constructed on the Mg-Zn-Y-Nd (ZE21B) alloy to enhance its degradation rate, blood compatibility, and the capacity to promote endothelialization in the field of vascular stent applications. This coating comprised layers of magnesium fluoride, polydopamine, fucoidan, and the chemerin 15 (C15) peptide, achieved through a surface modification technique. The modified ZE21B alloy exhibited increased charge transfer resistance and decreased corrosion current density, suggesting a marked enhancement in its corrosion resistance. Furthermore, the modified alloy demonstrated exceptional blood compatibility, as evidenced by the comparatively low magnitudes of hemolysis, fibrinogen adsorption and denaturation, and platelet adhesion. After fucoidan and C15 peptide were grafted on samples, the coating notably promoted key biological behaviors of endothelial cells (ECs), including adhesion, proliferation, migration, and nitric oxide (NO) release. In contrast, it could efficiently restrain smooth muscle cell adhesion and proliferation. The ECs on the fucoidan and C15 peptide modified ZE21B alloy exhibited obvious competitive growth advantages over SMCs in a co-culture system. Furthermore, the introduction of the C15 peptide had endowed the ZE21B alloy with anti-inflammatory properties through regulating the M2 polarization of macrophages. This study offered a highly promising approach for the development of degradable MAS endowed with outstanding corrosion resistance and vascular histocompatibility.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102121"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148949685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructure characteristic and fracture failure behavior of Mg-Al-Zn alloy joint fabricated by oscillating laser-CMT hybrid welding","authors":"Yanqiu Zhao,&nbsp;Ruizu Liu,&nbsp;Xiaojie Cui,&nbsp;Yue Li,&nbsp;Peng Li,&nbsp;Peiyun Xia,&nbsp;Lianglu Wu,&nbsp;Xiong Zhang,&nbsp;Zhuanni Gao,&nbsp;Xiaohong Zhan","doi":"10.1016/j.jma.2026.102153","DOIUrl":"10.1016/j.jma.2026.102153","url":null,"abstract":"<div><div>The weldability of the newly developed corrosion-resistant Mg-Al-Zn alloy, characterized by concurrent high strength-toughness and corrosion resistance surpassing conventional magnesium alloys, becomes imperative for evaluating their overall utility and facilitating its integration into next-generation missile architectures. In this paper, the oscillating laser-cold metal transfer (CMT) hybrid welding was carried out to achieve high-quality Mg-Al-Zn alloy joints. The macro morphology, microstructure characteristic, and fracture failure behavior of Mg-Al-Zn alloy welded joint were researched. The in-situ observation during tensile test process for welded joint was employed to elucidate the complete expansion trajectory of the crack from its initiation to its final fracture. The influence mechanism of microstructure evolution on tensile property and its fracture failure behavior was revealed. The results indicates that 8-shaped and circular oscillations exert the most profound influence on the refinement and homogenization of the microstructure. The crack initiation exhibits a marked propensity for localization, wherein the failure mechanism is predominantly dictated by specific sites. In the absence of oscillation, cracks transition abruptly into the acceleration phase following initiation, resulting in a markedly diminished stable propagation zone. Conversely, under circular oscillation, crack propagation exhibits superior stability, characterized by a delayed onset of acceleration and a reduced growth rate. This behavior suggests an enhanced capacity for plastic coordination.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102153"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148287178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extrusion ratio-induced microstructural disparity and plastic deformation behavior in dual-phase Mg-Li-Zn-Y alloys","authors":"Shutang Gao,&nbsp;Xiaozhe Ge,&nbsp;Ming Liang,&nbsp;Feng Zhong,&nbsp;Tao Wang,&nbsp;Lin Pi,&nbsp;Liangliang Xue,&nbsp;Jianfeng Li,&nbsp;Chengshan Li,&nbsp;Hailong Xu","doi":"10.1016/j.jma.2026.102188","DOIUrl":"10.1016/j.jma.2026.102188","url":null,"abstract":"<div><div>This study systematically investigates the influence of extrusion ratio on the microstructure and mechanical properties of a dual-phase Mg-10.16Li-2.63Zn-0.08Y (wt.%) alloy, with Visco-plastic Self-consistent modeling incorporating Predominant Twin Reorientation (VPSC-PTR) modeling employed to quantitatively elucidate the distinct deformation mechanisms of the α-Mg and β-Li phases. The results demonstrate that increasing the extrusion ratio enhances interphase deformation compatibility and significantly suppresses {10-12} extension twinning in the α-Mg phase, owing to elevated deformation heating. Marked disparity in microstructural evolution is observed between the two phases: the α-Mg phase exhibits only limited recrystallization (with a recrystallized fraction of merely ∼36%), whereas the β-Li phase transitions from partial to complete recrystallization followed by pronounced grain growth, which may be attributed to the higher atomic diffusivity in the BCC β-Li phase than in the HCP α-Mg phase. These microstructural changes are accompanied by markedly enhanced ductility but a marginal reduction in strength as the extrusion ratio increases. The alloy with an extrusion ratio of 25 (E25) achieves optimal ductility, with an elongation (EL) of 49.6%, while retaining moderate strength (yield strength (YS) of 141 MPa and ultimate tensile strength (UTS) of 177 MPa). Such ductility improvement is primarily attributed to the drastically reduced twin density within the α-Mg phase, which alleviates twin-matrix interfacial incompatibility and mitigates stress concentration, thereby suppressing intraphase crack initiation. VPSC-PTR simulations further reveal that plastic deformation is dominated by the soft β-Li matrix via {110}&lt;111&gt; slip (supplemented by {112}&lt;111&gt; slip), accommodating the majority of strain, while the hard α-Mg phase primarily provides load-bearing capacity.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102188"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148385181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of trace Ho alloying on hydrogen storage performance of Mg-Ni-Gd alloys","authors":"Hansong Xue, Jun Li, Yu’an Chen, Ying Liu, Jiekuan Xing, Hongbing He, Ming Zhang, Zengjun Wei, Zhao Ding, Jinfeng Huang, Jia She, Jia Hu, Fusheng Pan","doi":"10.1016/j.jma.2026.102215","DOIUrl":"https://doi.org/10.1016/j.jma.2026.102215","url":null,"abstract":"","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"141 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148460199","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":"In situ observation on filiform corrosion propagation in Mg-Al-Y alloy: the effects of continuous and discontinuous Mg17Al12 precipitates","authors":"Haiyang Wang, Yue Yang, Chenyu Wang, Yuyang Chen, Chao Zhou, Shuliang Zhao, Xingpeng Liao, Yao Yang, Tao Ying, Xiaoqin Zeng","doi":"10.1016/j.jma.2026.102202","DOIUrl":"https://doi.org/10.1016/j.jma.2026.102202","url":null,"abstract":"The filiform corrosion behavior of an aged Mg-9Al-0.2Y (wt.%) alloy in a chloride solution was systematically investigated by in situ observations and advanced characterization. The results show that filiform corrosion preferentially propagates along the lamellar discontinuous Mg<ce:inf loc=\"post\">17</ce:inf>Al<ce:inf loc=\"post\">12</ce:inf> precipitates (DPs) regions, whereas the dense continuous precipitates (CPs) regions exhibit a barrier effect against corrosion propagation. The stronger micro-galvanic effect and the higher α-Mg fraction in the DPs regions facilitate the preferential propagation of filiform corrosion. Due to the weaker micro-galvanic interaction and compact cross-linked microstructure, a dense and well-adhered corrosion product layer forms at the CPs-region interfaces, effectively suppressing the anodic dissolution tendency of the Mg matrix. It was further demonstrated that corrosion preferentially propagated along grain boundary regions with higher electrochemical activity, particularly when its propagation was hindered by CPs-rich regions.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"149 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148402076","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":"Editorial: Magnesium based composites","authors":"Manoj Gupta","doi":"10.1016/j.jma.2026.102201","DOIUrl":"https://doi.org/10.1016/j.jma.2026.102201","url":null,"abstract":"","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"34 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148402126","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":"Magnesium metal batteries for post-lithium alternatives?","authors":"Qiuming Peng","doi":"10.1016/j.jma.2026.102196","DOIUrl":"https://doi.org/10.1016/j.jma.2026.102196","url":null,"abstract":"","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"78 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148383722","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":"Suspension-calcined dolomite with ultrahigh reactivity for silicothermic magnesium production","authors":"Yingzi Ma, Tianyu Wang, Jiaqing Ye, Pengfei Wang, Chuanwei Fan, Yuecun Wang, Zhiwei Shan","doi":"10.1016/j.jma.2026.102193","DOIUrl":"https://doi.org/10.1016/j.jma.2026.102193","url":null,"abstract":"","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"2 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148383723","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}