Journal of Magnesium and Alloys最新文献

{"title":"Dual-phase synergistically enhancing mechanical properties and thermal conductivity of hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy","authors":"Xudong Li,&nbsp;Wenbo Du,&nbsp;Feng Lou,&nbsp;Ning Ding,&nbsp;Xian Du,&nbsp;Shubo Li","doi":"10.1016/j.jma.2024.03.026","DOIUrl":"10.1016/j.jma.2024.03.026","url":null,"abstract":"<div><div>The contradiction between mechanical properties and thermal conductivity of magnesium alloys is a roadblock for their widespread applications. In this study, we developed a hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy with high-strength and high-thermal-conductivity via dual-phase, W-phase and α-Mn, synergistically strengthening. The alloy extruded at 300 °C exhibited the yield strength and elongation of 372 MPa and 12%, respectively, it simultaneously demonstrated a high thermal conductivity of 134.3W/(m·K). After extrusion, the original coarse W-phase in the alloy was broken into near-spheroidal particles, which reduced the probability of electron scattering. In addition, a large number of solute atoms dynamically precipitated in the form of nanoscale rod-like W-phase and α-Mn, making α-Mg matrix revert to a nearly periodic arrangement state. The high yield strength of the alloy is predominantly determined by grain boundary strengthening as well as W-phase and α-Mn dual-phase strengthening. Notably, the strategy of dual-phase strengthening provides a valuable approach for developing structure-function integrated Mg alloys.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 3","pages":"Pages 1176-1186"},"PeriodicalIF":15.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140795325","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":"Unexpected texture transition induced by grain growth during static annealing of a dilute Mg-1Al alloy","authors":"Meng-Na Zhang ,&nbsp;Hai-Long Jia ,&nbsp;Xiao Ma ,&nbsp;Lei Zhao ,&nbsp;Zhi-Gang Li ,&nbsp;Min Zha","doi":"10.1016/j.jma.2024.04.013","DOIUrl":"10.1016/j.jma.2024.04.013","url":null,"abstract":"<div><div>Conventional rolled Mg-Al alloy sheets typically exhibit strong basal textures that remain and may even strengthen after recrystallization annealing due to the preferential growth of basal-oriented grains, resulting in poor formability at room temperature. Therefore, the knowledge of recrystallization and grain growth is critical for modifying textures of Mg-Al alloy sheets. The static recrystallization and texture evolution in a cold-rolled dilute Mg-1Al (wt.%) alloy during various annealed temperatures ranging from 300 °C to 450 °C, have been investigated using the quasi in-situ electron backscatter diffraction (EBSD) method. The as-rolled Mg-1Al alloy shows a dominant basal texture, which weakens and broadens in the rolling direction (RD) during the subsequent annealing, accompanied by the formation of <span><math><mrow><mo>〈</mo><mrow><mn>1</mn><mspace></mspace></mrow><mn>0</mn><mspace></mspace><mover><mn>1</mn><mo>¯</mo></mover><mspace></mspace><mn>0</mn><mo>〉</mo></mrow></math></span> texture component. Particularly, the <span><math><mrow><mo>〈</mo><mrow><mn>1</mn><mspace></mspace></mrow><mn>0</mn><mspace></mspace><mover><mn>1</mn><mo>¯</mo></mover><mrow><mspace></mspace><mn>0</mn></mrow><mo>〉</mo></mrow></math></span> texture component is more pronounced after annealing at high temperatures. The quasi in-situ EBSD results show that recrystallized grains are mainly induced by shear bands, which exhibit a wide spectrum of orientations with c-axis tilt angles ranging 20°-45° from the normal direction (ND). Orientations of shear band-induced recrystallized grains are retained during the entire recrystallization process, resulting in a reduction in the texture intensity. Moreover, recrystallized grains belonging to the <span><math><mrow><mo>〈</mo><mrow><mn>1</mn><mspace></mspace></mrow><mn>0</mn><mspace></mspace><mover><mn>1</mn><mo>¯</mo></mover><mrow><mspace></mspace><mn>0</mn></mrow><mo>〉</mo></mrow></math></span> texture component grow preferentially compared to those with other orientations, which is attributed to low energy grain boundaries, especially grain boundaries with ∼30° misorientation angles. Furthermore, the high temperature annealing facilitates the rapid growth of grain boundaries having a 30° misorientation angle, leading to the occurrence of distinct <span><math><mrow><mo>〈</mo><mrow><mn>1</mn><mspace></mspace></mrow><mn>0</mn><mspace></mspace><mover><mn>1</mn><mo>¯</mo></mover><mrow><mspace></mspace><mn>0</mn></mrow><mo>〉</mo></mrow></math></span> texture after annealing at 450 °C for 1 h. The results provide insights for texture modification of rare earth-free low-alloyed Mg alloys by controlling annealing parameters.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 3","pages":"Pages 1133-1148"},"PeriodicalIF":15.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141047055","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":"Decoration of CoFe-LDH/porous MgO composite with ZrO2 nanoparticles for efficient photocatalytic removal of indigo carmine","authors":"Tehseen Zehra ,&nbsp;Ananda Repycha Safira ,&nbsp;Arash Fattah-alhosseini ,&nbsp;Mohammad Alkaseem ,&nbsp;Mosab Kaseem","doi":"10.1016/j.jma.2025.02.001","DOIUrl":"10.1016/j.jma.2025.02.001","url":null,"abstract":"<div><div>This study presents a novel photocatalytic system exploiting the unique properties of ZrO₂ and its integration with layered double hydroxide (LDH) films on porous coatings produced via plasma electrolytic oxidation (PEO). Herein, CoFe-LDH films were created on the porous surface of PEO-coated AZ31 Mg alloy using a hydrothermal treatment in cobalt and iron nitrate solutions, followed by a secondary hydrothermal process in a ZrO₂ solution for 10 h at 70 °C. The impact of ZrO₂ on the morphological, compositional, and photocatalytic performance was then compared to the case where ZrO₂ nanoparticles were electrophoretically incorporated into the porous PEO coating. Characterization results revealed that the ZrO₂-modified LDH coatings exhibited a dispersed flake-like structure with an increased surface area, a reduced band gap energy of 3.14 eV, and enhanced electron-hole separation. Experimental results demonstrated an outstanding 99.8% degradation of indigo carmine within 15 mins, with remarkable multi-cycle stability over five consecutive cycles without significant performance decline. This system demonstrates faster degradation rates and greater durability compared to previously reported catalysts, underscoring its potential for effective and sustainable environmental remediation. The synergistic integration of ZrO₂, LDH, and PEO highlights a promising strategy for wastewater treatment, particularly for the removal of persistent organic dyes like indigo carmine.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 3","pages":"Pages 1203-1217"},"PeriodicalIF":15.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507135","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":"Revealing the limits of laser energy density: A study of the combined effects of process parameters on melt pool and microstructure in WE43 magnesium alloys","authors":"Chee Ying Tan ,&nbsp;Cuie Wen ,&nbsp;Edwin Mayes ,&nbsp;Dechuang Zhang ,&nbsp;Hua Qian Ang","doi":"10.1016/j.jma.2025.01.019","DOIUrl":"10.1016/j.jma.2025.01.019","url":null,"abstract":"<div><div>Additive manufacturing (AM) has revolutionized modern manufacturing, but the application of magnesium (Mg) alloys in laser-based AM remains underexplored due to challenges such as oxidation, low boiling point, and thermal expansion, which lead to defects like porosity and cracking. This study provides a comprehensive analysis of microstructure changes in WE43 magnesium (Mg) alloy after laser surface melting (LSM), examining grain morphology, orientation, size, microsegregation, and defects under various combinations of laser power, scan speed, and spot size. Our findings reveal that variations in laser power and spot size exert a more significant influence on the depth and aspect ratio of the keyhole melt pool compared to laser scan speed. Critically, we demonstrate that laser energy density, while widely used as a quantitative metric to describe the combined effects of process parameters, exhibits significant limitations. Notable variations in melt pool depth, normalized width, and microstructure with laser energy density were observed, as reflected by low R² values. Additionally, we underscore the importance of assessing the temperature gradient across the width of the melt pool, which determines whether conduction or keyhole melting modes dominate. These modes exhibit distinct heat flow mechanisms and yield fundamentally different microstructural outcomes. Furthermore, we show that the microstructure and grain size in conduction mode exhibit a good correlation with the temperature gradient (G) and solidification rate (R). This research provides a framework for achieving localized microstructural control in LSM, providing insights to optimize process parameters for laser-based 3D printing of Mg alloys, and advancing the integration of Mg alloys into AM technologies.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 3","pages":"Pages 1034-1049"},"PeriodicalIF":15.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526536","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":"Mechanism and application prospect of magnesium-based materials in cancer treatment","authors":"Yutong Ma ,&nbsp;Yi Wang ,&nbsp;Siwei Song ,&nbsp;Xinyue Yu ,&nbsp;Can Xu ,&nbsp;Long Wan ,&nbsp;Fan Yao ,&nbsp;Ke Yang ,&nbsp;Frank Witte ,&nbsp;Shude Yang","doi":"10.1016/j.jma.2025.02.010","DOIUrl":"10.1016/j.jma.2025.02.010","url":null,"abstract":"<div><div>Magnesium-based materials, including magnesium alloys, have emerged as a promising class of biodegradable materials with potential applications in cancer therapy due to their unique properties, including biocompatibility, biodegradability, and the ability to modulate the tumor microenvironment. The main degradation products of magnesium alloys are magnesium ions (Mg²⁺), hydrogen (H₂), and magnesium hydroxide (Mg(OH)₂). Magnesium ions can regulate tumor growth and metastasis by mediating the inflammatory response and oxidative stress, maintaining genomic stability, and affecting the tumor microenvironment. Similarly, hydrogen can inhibit tumorigenesis through antioxidant and anti-inflammatory properties. Moreover, Mg(OH)₂ can alter the pH of the microenvironment, impacting tumorigenesis. Biodegradable magnesium alloys serve various functions in clinical applications, including, but not limited to, bone fixation, coronary stents, and drug carriers. Nonetheless, the anti-tumor mechanism associated with magnesium-based materials has not been thoroughly investigated. This review provides a comprehensive overview of the current state of magnesium-based therapies for cancer. It highlights the mechanisms of action, identifies the challenges that must be addressed, and discusses prospects for oncological applications.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 3","pages":"Pages 982-1011"},"PeriodicalIF":15.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143538452","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":"Revealing the intrinsic connection between residual strain distribution and dissolution mode in Mg-Sc-Y-Ag anode for Mg-air battery","authors":"Wei-li Cheng ,&nbsp;Xu-bang Hao ,&nbsp;Jin-hui Wang ,&nbsp;Hui Yu ,&nbsp;Li-fei Wang ,&nbsp;Ze-qin Cui ,&nbsp;Cheng Chang","doi":"10.1016/j.jma.2025.01.006","DOIUrl":"10.1016/j.jma.2025.01.006","url":null,"abstract":"<div><div>The dominated contradiction in optimizing the performance of magnesium-air battery anode lies in the difficulty of achieving a good balance between activation and passivation during discharge process. To further reconcile this contradiction, two Mg-0.1Sc-0.1Y-0.1Ag anodes with different residual strain distribution through extrusion with/without annealing are fabricated. The results indicate that annealing can significantly lessen the “pseudo-anode” regions, thereby changing the dissolution mode of the matrix and achieving an effective dissolution during discharge. Additionally, p-type semiconductor characteristic of discharge product film could suppress the self-corrosion reaction without reducing the polarization of anode. The magnesium-air battery utilizing annealed Mg-0.1Sc-0.1Y-0.1Ag as anode achieves a synergistic improvement in specific capacity (1388.89 mA h g^-1) and energy density (1960.42 mW h g^-1). This anode modification method accelerates the advancement of high efficiency and long lifespan magnesium-air batteries, offering renewable and cost-effective energy solutions for electronics and emergency equipment.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 3","pages":"Pages 1020-1033"},"PeriodicalIF":15.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077170","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":"Laser powder bed fusion of WE43 magnesium alloy with superior balance of strength and ductility","authors":"Wenhe Xu ,&nbsp;Jikang Li ,&nbsp;Zhenwu Zhang ,&nbsp;Hongwei Yuan ,&nbsp;Guojin An ,&nbsp;Hai Shi ,&nbsp;Chao Cai ,&nbsp;Wenming Jiang ,&nbsp;Wei Li ,&nbsp;Qingsong Wei","doi":"10.1016/j.jma.2024.03.012","DOIUrl":"10.1016/j.jma.2024.03.012","url":null,"abstract":"<div><div>WE43 is a high-strength magnesium alloy containing rare-earth elements such as Y, Gd and Nd. Nevertheless, how to further obtain the balance of strength and ductility, as well as the manufacture of complex structures is still a dilemma for its engineering application. In this study, WE43 alloy samples with fine microstructures, high densification and excellent mechanical properties were successfully prepared by laser powder bed fusion (LPBF) additive manufacturing. The optimal process window was established, and the formation mechanisms of three types of porosity defects were revealed, namely lack-of-fusion pores, melt fluctuation-induced pores, and keyhole-induced pores. With the combined process of laser power of 200 W and scanning speed of 600 mm/s, samples with a high density of 99.89% were obtained. Furthermore, periodic heterogeneous microstructure was prepared along the build direction, i.e., fine grains (∼4.1 µm) at melt pool boundaries and coarse grain (∼23.6 µm) inside melt pool. This was mainly due to the preferential precipitation of Zr and Mg₃(Gd, Nd) nano-precipitates at the melt pool boundaries providing nucleation sites for the grains. This special feature could provide an extra hetero-deformation induced (HDI) strengthening and retard fracture. The optimal tensile yield strength, ultimate tensile strength and elongation at break were 276 ± 1 MPa, 292 ± 1 MPa and 6.1 ± 0.2%, respectively. The obtained tensile properties were superior to those of other magnesium alloys and those fabricated by other processes. The solid solution strengthening (∼24.5%), grain boundary strengthening (∼14.4%) and HDI strengthening (∼32.2%) were the main sources of high yield strength. This work provides a guidance on studying the pore defect suppression and strengthening mechanisms of WE43 alloy and other magnesium alloys produced by LPBF.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 3","pages":"Pages 1275-1293"},"PeriodicalIF":15.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140780778","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":"Synergistic improvement of mechanical and electromagnetic shielding properties of a Mg-Li-Y-Zn alloy following heat treatment","authors":"Jinsheng Li ,&nbsp;Liping Zhong ,&nbsp;Junli Wang ,&nbsp;Zhongxue Feng ,&nbsp;Yan Qu ,&nbsp;Ruidong Xu","doi":"10.1016/j.jma.2024.03.013","DOIUrl":"10.1016/j.jma.2024.03.013","url":null,"abstract":"<div><div>The performances of magnesium alloys remain insufficient to further enhance the application potential of ultralight magnesium alloys. In this work, a Mg-8Li-3Y-2Zn alloy was prepared through vacuum melting and subsequent heat treatment at 300, 450, and 500 °C. The material properties of the resulting samples were assessed through microstructural observation, tensile testing, electrical conductivity measurements, and electromagnetic shielding effectiveness (EMI-SE) testing. The influence of the Mg-8Li-3Y-2Zn alloy microstructure on its mechanical and electromagnetic shielding properties in different states was investigated. It was found that the as-cast alloy contains α-Mg, β-Li, Mg₃Zn₃Y₂, and Mg₁₂ZnY phases. Following heat treatment at 500 ℃ (HT500), the block α-Mg phase transformed fine needle-shapes, its tensile strength increased to 263.7 MPa, and its elongation reached 45.3%. The mechanical properties of the alloy were significantly improved by the synergistic effects imparted by the needle-shaped α-Mg phase, solid solution strengthening, and precipitation strengthening. The addition of Y and Zn improved the EMI-SE of Mg-8Li-1Zn alloy, wherein the HT500 sample exhibits the highest SE, maintaining a value of 106.7–76.9 dB in the frequency range of 30–4500 MHz; this performance has rarely been reported for electromagnetically shielded alloys. This effect was mainly attributed to the multiple reflections of electromagnetic waves caused by the severe impedance mismatch of the abundant phase boundaries, which were in turn provided by the dual-phase (α/β) and secondary phases. Furthermore, the presence of nano-precipitation was also believed to enhance the absorption of electromagnetic waves.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 3","pages":"Pages 1243-1257"},"PeriodicalIF":15.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140621715","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":"Robust interfacial bonding achieved via phase separation induced by enhanced Al diffusion during AZ31/high-entropy alloy friction stir welding","authors":"Gaohui Li ,&nbsp;Haining Yao ,&nbsp;Boyuan Fu ,&nbsp;Ke Chen ,&nbsp;Katsuyoshi Kondoh ,&nbsp;Nannan Chen ,&nbsp;Min Wang","doi":"10.1016/j.jma.2024.09.010","DOIUrl":"10.1016/j.jma.2024.09.010","url":null,"abstract":"<div><div>Welding high-entropy alloy (HEA) to Mg alloy has gained increasing attention for multi-metal structure design, while intrinsic sluggish diffusion kinetics of HEA confines diffusion-controlled interfacial reactions and makes it challenging to establish robust metallurgical bonding. This study investigated welding of FeCoCrNiMn HEA to commercial AZ31 as a model combination to pioneer this field. Interfacial phase separation phenomenon was observed, with the diffusion accelerated by <em>in-situ</em> engineering a submicron-scale thick (∼400–500 nm) HEA nearby the interface into nanocrystalline-structure during friction stir welding. Abundant grain boundaries generated in this nanocrystalline-interlayer serve as diffusion short-circuits and energetically preferred nucleation-sites, which promoted Al in AZ31 to diffuse into HEA and triggered quick separation into body-centered cubic AlNi-type and tetragonal FeCr-type intermetallics. HEA and AZ31 were thus metallurgically bonded by these interfacial intermetallics. The joint shows exceptional strength in tensile lap-shear testing with fracture largely occurred within AZ31 rather than right along interface as commonly reported previously for dissimilar joints.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 3","pages":"Pages 1012-1019"},"PeriodicalIF":15.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142519459","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":"Mechanisms of grain refinement and improved kinetic property of nanocrystalline Mg-Ni-La hydrogen storage alloys prepared by nanocrystallization of amorphous","authors":"Y.M. Li ,&nbsp;Z.C. Liu ,&nbsp;X. Dong ,&nbsp;Y.P. Ji ,&nbsp;C.J. Shi ,&nbsp;G.F. Zhang ,&nbsp;Y.Z. Li ,&nbsp;J. Kennedy ,&nbsp;F. Yang","doi":"10.1016/j.jma.2024.07.022","DOIUrl":"10.1016/j.jma.2024.07.022","url":null,"abstract":"<div><div>Mg_x(Ni_0.8La_0.2)_100-x, where x = 60, 70, 80, exhibiting a nanocrystalline microstructure, were prepared through the crystallization of amorphous alloys. The investigation encompassed the phase constitution, grain size, microstructural stability, and hydrogen storage properties. Crystallization kinetics, along with in-situ high-energy XRD characterization, revealed a concentrated and synchronous crystallization of Mg₂Ni and RE-Mg-Ni ternary phases with the increase in La and Ni content. The attributed synchronous crystallization process was found to be a result of the close local affinity of Mg₂Ni and RE-Mg-Ni ternary phases, as assessed by the thermodynamic Miedema model. Significant secondary phase pinning effect, arising from the high likelihood of well-matching phase structures between Mg₂Ni, LaMg₂Ni, and LaMgNi₄, was validated through both the edge-to-edge matching model prediction and experimental observation. The fine and homogeneous microstructure was shown to be a consequence of fast crystallization kinetics and the secondary phase pinning effect. Improved activation performance and cycling stability were observed, stemming from grain refinement and excellent microstructural stability. Our study provides insights into mechanism of grain refinement of nanocrystalline microstructure tailored by phase constitution and crystallization kinetics in the amorphous-crystallization route. We also demonstrate the potential of material design guided by phase equilibria and crystallographic predictions to improve nanocrystalline with excellent microstructural stability.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 3","pages":"Pages 1364-1381"},"PeriodicalIF":15.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767932","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}