Journal of Magnesium and Alloys最新文献

{"title":"Bioactive Ca-P coatings on WE43 alloy via soft sparking PEO: Structure, electrochemical performance and cytotoxicity studies","authors":"Barbara Rynkus, Maciej Sowa, Ada Orłowska, Aneta Samotus, Marcin Godzierz, Karolina Wilk, Janusz Szewczenko, Wojciech Simka","doi":"10.1016/j.jma.2025.06.011","DOIUrl":"https://doi.org/10.1016/j.jma.2025.06.011","url":null,"abstract":"Plasma electrolytic oxidation is a well-known technique for surface modification of biomedical magnesium alloys, with good corrosion protection and the ability to produce biocompatible and bioactive coatings. In this study, calcium-phosphate coatings were produced on WE43 magnesium alloy for use, as orthopedic implants. Coating formation was prepared using different oxidation parameters with various duty ratios (DR) of 15, 25 and 50 % and current ratios (R)-2 or 1.6. Application of <em>R</em> with excess cathodic current (<em>R</em> &gt; 1) in processes with DR≥25 % allowed attaining the soft-sparking regime (SSR) that resulted in thicker oxide coatings with higher degree of crystallinity compared to the films obtained without SSR. The results of the corrosion tests contributed to a noticeable improvement in the corrosion resistance of the magnesium alloy. Optimization of the oxidation parameters allowed the selection of the variants with the most favorable degradation behavior over the tested immersion period, indicating a successful modification of the magnesium alloy surface to obtain an implant biomaterial capable of providing controlled degradation. Furthermore, biological evaluation of the produced coatings showed that the proposed surface modifications significantly reduced the cytotoxic effects observed in direct contact with the material while still maintaining the cell proliferation-promoting effects of the material eluents.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"48 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144565778","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":"Biodegradable phosphorus-modified Mg2Ge/Mg-Cu composite with good angiogenic, osteogenic, and antibacterial functionalities for bone-fixation applications","authors":"Xian Tong, Lanxin Gu, Jianchen Yu, Yue Han, Yue Huang, Xinkun Shen, Yuncang Li, Jixing Lin, Cuie Wen, Daoyi Miao","doi":"10.1016/j.jma.2025.06.015","DOIUrl":"https://doi.org/10.1016/j.jma.2025.06.015","url":null,"abstract":"Magnesium (Mg)-based composites are expected to be useful for biodegradable bone-implant materials due to their degradability, similar elastic modulus to that of bone, and biofunctionalities. However, their rapid degradation, poor biotribology performance, and lack of vascularization and antibacterial activity are not conducive to bone-fixation applications. In this study, an <em>in situ</em> Mg₂Ge/Mg-Cu-P composite with a nominal composition of Mg-10Ge-2Cu-0.5P (denoted MGCP) was prepared via phosphorus (P)-modified casting followed by hot extrusion for biodegradable bone-fixation applications. For comparison, an <em>in situ</em> Mg₂Ge/Mg-Cu composite (Mg-10Ge-2Cu, denoted MGC) was prepared under the same conditions without P-modification. The hot-extruded (HE) MGCP sample showed significantly improved corrosion resistance with corrosion rates of 2.2 mm/y and 2.51 mm/y as measured by potentiodynamic-polarization and hydrogen-release testing in Dulbecco’s Modified Eagle Medium supplemented with fetal bovine serum (denoted DMEM). The HE MGCP also exhibited notably enhanced mechanical properties and biotribological resistance in DMEM, with an σ_UTS of ∼304.2 MPa, σ_TYS of ∼202.5 MPa, elongation of ∼12.3%, σ_UCS of 769.0 MPa, σ_CYS of 208.0 MPa, and Brinell hardness of 105.3 HB, along with smaller σ_TYS and σ_CYS decreases after 3 d of immersion in Hanks’ solution. In comparison to pure titanium and Mg, the HE MGCP demonstrated much greater cytocompatibility, angiogenic capacity, and osteogenic differentiation and mineralization capability. Furthermore, the HE MGCP displayed markedly higher <em>in vitro</em> antibacterial activity, <em>in vivo</em> antibacterial and anti-inflammatory ability, and good biosafety in a rat subcutaneous-implantation model compared to pure titanium and Mg, indicating significant potential for biodegradable bone-fixation applications.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"20 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144565880","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":"Interpretable machine learning enables high performance of magnesium borohydride hydrogen storage system","authors":"Yuxiao Jia, Hui Fang, Lixin Chen, Bo Han, Lin Tang, Jianchuan Wang, Yongpeng Xia, Yongjin Zou, Lixian Sun, Hai-Wen Li, Marek Polański, Xiulin Fan, Yong Du, Xuezhang Xiao","doi":"10.1016/j.jma.2025.06.009","DOIUrl":"https://doi.org/10.1016/j.jma.2025.06.009","url":null,"abstract":"Aiming to provide optimal solutions to the sluggish kinetics of Mg(BH₄)₂, this study proposes, for the first time, a novel machine learning model to predict dehydrogenation behaviors of modified Mg(BH₄)₂. Notably, numerous data points are collected from temperature-programmed, isothermal, and cyclic dehydrogenation behaviors, a neural network model is proposed by using multi-head attention mechanisms, which exhibits the highest predictive performance compared to traditional machine learning models. The study also ranks different variables influencing dehydrogenation processes, employing interpretable analysis to identify critical variable thresholds, offering guidance for the experimental parameter design. The model can also be adapted to scenarios involving co-doping of hydrides and catalysts in Mg(BH₄)₂ system and proved high accuracy and scalability in predicting dehydrogenation curves under diverse conditions. Employing the model, performance predictions for a series of undeveloped Mg(BH₄)₂ co-doping systems can be made, and superior dehydrogenation catalytic effects of fluorinated graphite (FGi) are uncovered. Real-world experimental validation of the optimal Mg(BH₄)₂-LiBH₄-FGi system confirms consistency with model predictions, and performance enhancement attributes to experimental parameter optimization. Further characterizations provide mechanistic insights into the synergistic interactions of FGi and LiBH₄. This work paves the way for advancing utilization of machine learning in the high-capacity hydrogen storage field.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"78 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144565799","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":"Study on the synergistic strengthening mechanism of pre-tension deformation and surface mechanical rolling treatment on the fatigue performance of AZ31B magnesium alloy","authors":"Jie Gao, Shubang Wang, Jiaxing Cai, Wenlong Xin, Zhifeng Yan","doi":"10.1016/j.jma.2025.05.014","DOIUrl":"https://doi.org/10.1016/j.jma.2025.05.014","url":null,"abstract":"AZ31B magnesium alloy is widely used in transportation and aerospace fields due to its light weight and high strength, but it often causes structural failure due to fatigue fracture during service. Fatigue fracture is usually caused by the initiation of cracks on the surface of structural parts and the propagation of cracks to the interior of the specimen in the form of intergranular fracture. In order to improve the fatigue performance, this study proposes a method of pre-tension deformation and surface mechanical rolling treatment of AZ31B magnesium alloy, thereby changing the crack initiation area and increasing the crack propagation resistance. The experimental results show that: As the pre-tension deformation increases, the fatigue limit shows a trend of first rising and then decreasing. The 5PT specimen exhibits the optimal strengthening effect, with a fatigue limit of 115 MPa, which is a 27.78 % improvement. Under surface mechanical rolling treatment, the fatigue limit reaches 140 MPa, which is a 55.56 % improvement. When pre-tension deformation and surface mechanical rolling treatment are combined, the fatigue limit is further improved compared to individual strengthening methods. Among these, the 2PT+SMRT specimen shows the most significant strengthening effect, with a fatigue limit of 150 MPa, which is a 66.67 % improvement. This study proposes a new strategy for improving the fatigue performance of AZ31B magnesium alloy, and reveals the synergistic strengthening mechanism of pre-tension deformation and surface mechanical rolling treatment of AZ31B magnesium alloy, which is of great significance for improving the fatigue performance of metal materials.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"8 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144521406","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":"Effect of Al addition on microstructure, texture evolution and mechanical properties of Mg-1Zn-1Y-0.1Mn alloy sheets","authors":"Ying Ma, Seoung-yooun Yu, Young Min Kim, Taekyung Lee, Byeong-Chan Suh","doi":"10.1016/j.jma.2025.06.006","DOIUrl":"https://doi.org/10.1016/j.jma.2025.06.006","url":null,"abstract":"The microstructure and texture evolution of Mg-xAl-1Zn-1Y-0.1Mn alloys are systematically analyzed. There is no effect of Al addition on grain refinement in the Mg-1Zn-1Y-0.1Mn alloy, but the addition of 0.5 wt. % or more Al element dramatically changes texture from a weak texture to a strong basal texture. The predominant second phase particle of Mg<ce:inf loc=\"post\">3</ce:inf>Zn<ce:inf loc=\"post\">3</ce:inf>Y<ce:inf loc=\"post\">2</ce:inf> phase in the Mg-1Zn-1Y-0.1Mn alloy changes to Al<ce:inf loc=\"post\">2</ce:inf>Y phase by the addition of only 0.1 wt. % Al element, and the concentrations of dissolved Y element in the 0Al, 0.1Al, 0.3Al, 0.5Al and 1Al alloys are 0.50, 0.31, 0.23, 0.15 and 0.06 wt. %, respectively. Although the 0.5 wt. % or more Al-added alloys have higher Schmid factor for prismatic 〈a〉 slip than the 0.3 wt. % or less Al-added alloys, the lower Al containing alloys show much higher activity of prismatic 〈a〉 slip than the higher Al containing alloys. It demonstrates that the addition of high amount of Al element in Mg-Zn-RE alloy dramatically decrease the dissolved Y element, resulting in a significant deterioration of activity of prismatic 〈a〉 slip and consequently a poor formability at room temperature.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"27 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144515433","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":"Multi-scale simplified residual convolutional neural network model for predicting compositions of binary magnesium alloys","authors":"Xu Qin, Qinghang Wang, Xinqian Zhao, Shouxin Xia, Li Wang, Jiabao Long, Yuhui Zhang, Yanfu Chai, Daolun Chen","doi":"10.1016/j.jma.2025.06.005","DOIUrl":"https://doi.org/10.1016/j.jma.2025.06.005","url":null,"abstract":"This study proposes a multi-scale simplified residual convolutional neural network (MS-SRCNN) for the precise prediction of Mg-Nd binary alloy compositions from scanning electron microscope (SEM) images. A multi-scale data structure is established by spatially aligning and stacking SEM images at different magnifications. The MS-SRCNN significantly reduces computational runtime by over 90 % compared to traditional architectures like ResNet50, VGG16, and VGG19, without compromising prediction accuracy. The model demonstrates more excellent predictive performance, achieving a &gt;5 % increase in R<ce:sup loc=\"post\">2</ce:sup> compared to single-scale models. Furthermore, the MS-SRCNN exhibits robust composition prediction capability across other Mg-based binary alloys, including Mg-La, Mg-Sn, Mg-Ce, Mg-Sm, Mg-Ag, and Mg-Y, thereby emphasizing its generalization and extrapolation potential. This research establishes a non-destructive, microstructure-informed composition analysis framework, reduces characterization time compared to traditional experiment methods and provides insights into the composition-microstructure relationship in diverse material systems.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"37 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144515572","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":"Mg-Zn-Mn alloys degradation in pancreatic fluid: Trypsin disrupts passivation for stent design","authors":"Qifeng Li, Senwei Wang, Jia She, Xianhua Chen, Lu Chen, Shixiang Guo","doi":"10.1016/j.jma.2025.06.003","DOIUrl":"https://doi.org/10.1016/j.jma.2025.06.003","url":null,"abstract":"Biodegradable magnesium alloys show promising potential for pancreatic duct stents, yet their degradation varies significantly across physiological environments. This study compared the corrosion rates of extruded Mg-2Zn-<em>x</em>Mn (<em>x</em> = 0, 0.5, 1.0, 1.5 wt. %) alloys in human pancreatic fluid. The results revealed that the alloys undergo different corrosion mechanisms in human pancreatic fluid, emphasizing the necessity of conducting evaluations under physiologically relevant conditions. Further investigations into the degradation mechanism in pancreatic fluid indicated that the alkaline pH (8.3–8.7), high bicarbonate concentration, and enzymatic activity significantly influence the corrosion process. Electrochemical and immersion tests showed rapid initial corrosion due to Cl⁻ attack, followed by the formation of a protective Mg(OH)₂, MgCO₃, and Ca₃(PO₄)₂ layer that slowed degradation. However, digestive enzymes, particularly trypsin, disrupt passivation by interacting with organic components, leading to pitting and filiform corrosion. Among the investigated alloys, Mg-2Zn-1.0Mn exhibited the most favorable combination of corrosion resistance, mechanical performance, and cytocompatibility. This study highlights the critical impact of pancreatic fluid on magnesium alloy degradation and stresses the need for physiologically accurate evaluations.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"45 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144488359","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":"Layered MoS2-supported and metallic Ni-doped MgH2 towards enhanced hydrogen storage kinetics and cycling stability","authors":"Haimei Tang, Yiqi Sun, Hua Ning, Hui Luo, Qinqin Wei, Cunke Huang, Zhiqiang Lan, Jin Guo, Xinhua Wang, Haizhen Liu","doi":"10.1016/j.jma.2025.05.012","DOIUrl":"https://doi.org/10.1016/j.jma.2025.05.012","url":null,"abstract":"Mg-based hydrogen storage materials have attracted much attention due to their high hydrogen content, abundant resources, and environmental friendliness. However, the high dehydrogenation temperature, slow kinetics and poor cycling stability are limiting its practical application. This work demonstrates the improved dehydrogenation kinetics and cycling stability of MgH<ce:inf loc=\"post\">2</ce:inf> modified by a hybrid of metallic Ni and layered MoS<ce:inf loc=\"post\">2</ce:inf> (denoted as “Ni-MoS<ce:inf loc=\"post\">2</ce:inf>”) introduced by ball milling, with Ni as the catalyst for MgH<ce:inf loc=\"post\">2</ce:inf> and MoS<ce:inf loc=\"post\">2</ce:inf> as the support for both Ni and MgH<ce:inf loc=\"post\">2</ce:inf>. The onset dehydrogenation temperature of MgH<ce:inf loc=\"post\">2</ce:inf> is reduced to 198 °C, and the rehydrogenation begins at a low temperature of 50 °C. The MgH<ce:inf loc=\"post\">2</ce:inf> + 10 wt % Ni-MoS<ce:inf loc=\"post\">2</ce:inf> composite has a fast dehydrogenation kinetics and can release 6.1 wt % hydrogen in 10 min at a constant temperature of 300 °C, with the dehydrogenation activation energy significantly reduced from 151 to 85 kJ mol<ce:sup loc=\"post\">−1</ce:sup>. During the cycling, the reversible capacity of the composite first exhibits a gradual increase for the initial 22 cycles and then maintains at 6.1 wt % from the 23th cycle to the 50th cycle. The Ni/MoS<ce:inf loc=\"post\">2</ce:inf> addition does not change the overall thermodynamic properties of MgH<ce:inf loc=\"post\">2</ce:inf> but can weaken the Mg–H bonds in the local regions as evident by theoretical calculation. Microstructure studies reveal that the metallic Ni will react with MgH<ce:inf loc=\"post\">2</ce:inf> to form Mg<ce:inf loc=\"post\">2</ce:inf>NiH<ce:inf loc=\"post\">0.3</ce:inf>, which can act as a hydrogen pump, while the layered MoS<ce:inf loc=\"post\">2</ce:inf> serves as a support for the well dispersion of MgH<ce:inf loc=\"post\">2</ce:inf> and Ni. It is believed that the synergy of Mg<ce:inf loc=\"post\">2</ce:inf>NiH<ce:inf loc=\"post\">0.3</ce:inf> and layered MoS<ce:inf loc=\"post\">2</ce:inf> contributes to the significantly enhanced hydrogen storage of MgH<ce:inf loc=\"post\">2</ce:inf>. This work provides a promising and simple strategy for enhancing the Mg-based hydrogen storage materials by combination of transition metals and layered materials introduced via simple ball milling.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"40 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144515434","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":"Exploring low-alloyed as-extruded Mg alloy with high strength and high corrosion resistance","authors":"Rirong Bao, Jinghuai Zhang, Yuying He, Zehua Li, Shujuan Liu, Hao Dong, Qiang Yang, Xiaobo Zhang, Xin Qiu","doi":"10.1016/j.jma.2025.06.002","DOIUrl":"https://doi.org/10.1016/j.jma.2025.06.002","url":null,"abstract":"The tradeoff between strength and corrosion resistance restricts the development of low-alloyed magnesium (Mg) alloys. In this work, a low-alloyed Mg-1Sm-0.8Mn-0.5Ca-0.4 Zn alloy was prepared through a simple process of conventional casting followed by proper hot-extrusion. The as-extruded alloy exhibits a very high yield strength of 402 MPa, an acceptable elongation of 5 %, and a low corrosion rate of 0.56 mm y^-1 which is close to that of high-purity Mg, and such comprehensive properties are superior to most reported Mg alloys, whether high alloying or low alloying. The special fine microstructure is responsible for high strength, including fine dynamic recrystallized (DRXed) grains, strong textured un-DRXed grains, dislocations and uniformly dispersed nano-spaced α-Mn nano-precipitates. An important finding of this study is that the corrosion film microstructure has amorphous characteristics, and this inevitably contributes to the high film protectiveness, and finally improves the corrosion resistance of the as-extruded alloy with relatively strong micro-galvanic corrosion tendency. In addition, the influence of micro/submicron-sized Mg₂Ca with anodic nature and nano-sized cathode α-Mn precipitates with strong strengthening effect on the corrosion film is also discussed. This study suggests that the strength-corrosion tradeoff can be evaded by regulating the microstructure of alloy substrate and corrosion film in the low-alloyed Mg alloy.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"26 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479190","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":"Excellent strength-ductility synergy property of wire-arc additively manufactured Mg-Gd-Y-Zr alloy investigated by heat treatment","authors":"Jiamin Li, Meng Huang, Juan Hou, Xingbin Wang, Gaopeng Xu, Yi Yang, Ning Mo, Yun Shi, Laichang Zhang, Weineng Tang","doi":"10.1016/j.jma.2025.03.026","DOIUrl":"https://doi.org/10.1016/j.jma.2025.03.026","url":null,"abstract":"In this work, the GW63K (Mg-6.54Gd-3.93Y-0.41Zr, wt.%) alloy wire was utilized as the feedstock material and the thin-walled component was fabricated using wire-arc additive manufacturing technology (WAAM). The microstructural evolution during deposition and subsequent heat treatment was explained through multi-scale microstructural characterization techniques, and the impact of heat treatment on the strength-ductility synergy of the deposited alloy was systematically compared. The results showed that the microstructure of the deposited sample was mainly composed of fine equiaxed α-Mg grains and Mg₂₄(Gd,Y)₅ phase. The optimized solution heat treatment (450 °<em>C</em> × 2 h) had little effect on the grain size, but can effectively reduce the Mg₂₄(Gd,Y)₅ eutectic phase on the grain boundary, resulting in a significant increase in elongation from 13.7% to 26.6%. After peak-aging treatment, the strength of the GW63K alloy increased to 370 MPa, which was significantly higher than the as-built state (267 MPa). The superior strength in this study is attributed to the refinement strengthening imparted by the fine microstructure inherited in the as-built GW63K alloy, as well as the precipitation strengthening due to the formation of dense β' precipitates with a pronounced plate-like aspect ratio.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"88 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144252556","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}