Journal of Magnesium and Alloys最新文献

{"title":"Atomistic simulation of the dislocation interactions with the Al2Ca Laves phase in Mg–Al–Ca alloy","authors":"Ruixue Liu ,&nbsp;Leyun Wang ,&nbsp;Mingyu Gong ,&nbsp;Xiaoqin Zeng","doi":"10.1016/j.jma.2023.03.005","DOIUrl":"10.1016/j.jma.2023.03.005","url":null,"abstract":"<div><div>The mechanical properties of Mg–Al–Ca alloys are significantly affected by their Laves phases, including the Al₂Ca phase. Laves phases are generally considered to be brittle and have a detrimental effect on the ductility of Mg. Recently, the Al₂Ca phase was shown to undergo plastic deformation in a dilute Mg-Al-Ca alloy to increase the ductility and work hardening of the alloy. In the present study, we investigated the extent to which the deformation of Al₂Ca is driven by dislocations in the Mg matrix by simulating the interactions between the basal edge dislocations and Al₂Ca particles. In particular, the effects of the interparticle spacing, particle orientation, and particle size were considered. Shearing of small particles and dislocation cross-slips near large particles were observed. Both events contribute to strengthening, and accommodate to plasticity. The shear resistance of the dislocation to bypass the particles increased as the particle size increased. The critical resolved shear stress (CRSS) for activating dislocations and stacking faults was easier to reach for small Al₂Ca particles owing to the higher local shear stress, which is consistent with the experimental observations. Overall, this work elucidates the driving force for Al₂Ca particles in Mg–Al–Ca alloys to undergo plastic deformation.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 7","pages":"Pages 3096-3103"},"PeriodicalIF":13.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49347219","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":"Cation-induced topical disordered niobium nickel oxide for robust hydrogen storage in magnesium hydride","authors":"Shuai Li ,&nbsp;Liuting Zhang ,&nbsp;Fuying Wu ,&nbsp;Qian Li","doi":"10.1016/j.jma.2024.10.011","DOIUrl":"10.1016/j.jma.2024.10.011","url":null,"abstract":"<div><div>Catalytic doping is one of the economic and efficient strategies to optimize the operating temperature and kinetic behavior of magnesium hydride (MgH₂). Herein, efficient regulation of electronic and structural rearrangements in niobium-rich nickel oxides was achieved through precise compositional design and niobium cation functionalized doping, thereby greatly enhancing its intrinsic catalytic activity in hydrogen storage systems. As the niobium concentration increased, the Ni-Nb catalysts transformed into a mixed state of multi-phase nanoparticles (composed of nickel and niobium-rich nickel oxides) with smaller particle size and uniform distribution, thus exposing more nucleation sites and diffusion channels at the MgH₂/Mg interface. In addition, the additional generation of active Ni-Nb-O mixed phase induced numerous highly topical disordered and distorted crystalline, promoting the transfer and reorganization of H atoms. As a result, a stable and continuous multi-phase/component synergistic catalytic microenvironment could be constructed, exerting remarkable enhancement on MgH₂'s hydrogen storage performance. After comparative tests, Ni_0.7Nb_0.3-doped MgH₂ presented the optimal low-temperature kinetics with a dehydrogenation activation energy of 78.8 kJ·mol⁻¹. The onset dehydrogenation temperature of MgH₂+10 wt% Ni_0.7Nb_0.3 was reduced to 198 °C and 6.18 wt% H₂ could be released at 250 °C within 10 min. In addition, the dehydrogenated MgH₂<img>NiNb composites absorbed 4.87 wt% H₂ in 10 min at 125 °C and a capacity retention rate was maintained at 6.18 wt% even after 50 reaction cycles. In a word, our work supplies fresh insights for designing novel defective-state multiphase catalysts for hydrogen storage and other energy related field.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 7","pages":"Pages 3418-3429"},"PeriodicalIF":13.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142597024","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":"Comparative study of dynamic recrystallization behavior, microstructural characteristics, and mechanical properties of high-speed-extruded AZ31 and BA56 magnesium alloys","authors":"Gun Woong An ,&nbsp;Sang-Cheol Jin ,&nbsp;Taekyung Lee ,&nbsp;Sumi Jo ,&nbsp;Sung Hyuk Park","doi":"10.1016/j.jma.2025.04.020","DOIUrl":"10.1016/j.jma.2025.04.020","url":null,"abstract":"<div><div>This study compares the microstructural evolution, dynamic recrystallization (DRX) behavior, tensile properties, and age-hardenability between the newly developed high-speed-extrudable BA56 alloy and those of the widely recognized AZ31 alloy in industry. Unlike the AZ31 alloy, which retains partially unrecrystallized grains, the high-speed-extruded BA56 alloy demonstrates a coarser but entirely recrystallized and more homogeneous microstructure. The fine-grained structure and abundant Mg₃Bi₂ particles in the BA56 extrusion billet significantly enhance its DRX behavior, thus enabling rapid and complete recrystallization during extrusion. The BA56 alloy contains band-like fragmented Mg₃Bi₂ particles and numerous fine Mg₃Bi₂ particles distributed throughout the material, in contrast to the sparse Al₈Mn₅ particles in the AZ31 alloy. These features contribute to superior mechanical properties of the BA56 alloy, which achieves tensile yield and ultimate tensile strengths of 205 and 292 MPa, respectively, compared to 196 and 270 MPa for the AZ31 alloy. The superior strength of the BA56 alloy, even with its coarser grain size, can be explained by its elevated Hall-Petch constant and the strengthening contribution from the fine Mg₃Bi₂ particles. Additionally, the BA56 alloy demonstrates significant age-hardenability, achieving a 22% enhancement in hardness following T5 aging, attributed to the precipitation of nanoscale Mg₃Bi₂ and Mg₁₇Al₁₂ phases. By contrast, the AZ31 alloy shows minimal hardening due to the absence of precipitate formation during aging. These findings suggest that the BA56 alloy is a promising candidate for the production of extruded Mg components requiring a combination of high productivity, superior mechanical performance, and wide-ranging process adaptability.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 7","pages":"Pages 3004-3019"},"PeriodicalIF":13.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153374","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":"Bioactive Ca-P coatings on WE43 alloy via soft sparking PEO: Structure, electrochemical performance and cytotoxicity studies","authors":"Barbara Rynkus ,&nbsp;Maciej Sowa ,&nbsp;Ada Orłowska ,&nbsp;Aneta Samotus ,&nbsp;Marcin Godzierz ,&nbsp;Karolina Wilk ,&nbsp;Janusz Szewczenko ,&nbsp;Wojciech Simka","doi":"10.1016/j.jma.2025.06.011","DOIUrl":"10.1016/j.jma.2025.06.011","url":null,"abstract":"<div><div>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 (<em>R</em>)-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.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 7","pages":"Pages 3398-3417"},"PeriodicalIF":13.8,"publicationDate":"2025-07-01","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":"Mechanism of keyhole evolution and welding quality of electron beam welded magnesium alloy with scanning path variation via modeling and numerical study","authors":"Qianxing Yin ,&nbsp;Ziyou Yang ,&nbsp;Hui Li ,&nbsp;Hejun Du","doi":"10.1016/j.jma.2024.07.006","DOIUrl":"10.1016/j.jma.2024.07.006","url":null,"abstract":"<div><div>Welding quality of electron beam welded joint is usually susceptible to the stability of keyhole during welding process. The more stable the keyhole, the better the welding quality. To reveal the evolution mechanism of keyhole and welding quality of the electron beam welded joint of magnesium-gadolinium alloy under different scanning path, numerical simulation was conducted for the changes in morphology of keyhole and liquid flow in molten pool. The magnesium-gadolinium alloy was welded by electron beam in vacuum with two different scanning paths, sinusoid path and cochleoid path, indicating the identical heat input, welding speed, and focusing state. The stability of keyhole was mainly related to the frequency of keyhole collapse. When the sinusoid scanning path was adopted, the fluids both inside the molten pool and at keyhole wall were disorder, corresponding to the numerous independent vortices and dramatically chaotic flows at their junctions. The maximum velocity of fluids ranged from 0.79 m/s to 1.02 m/s. The average and maximum depth of keyhole were 3.48 mm and 4.51 mm, respectively, meaning that the keyhole collapsed frequently. As the scanning path was changed into cochleoid mode, the electron beam scanned in a homogeneous manner without abrupt change in direction and speed like sinusoid path at its peaks and troughs. The maximum velocity of fluids was more uniform without drastic variation, ranging from 0.90 m/s to 1.01 m/s. The average and maximum depth of keyhole were decreased to 3.30 mm and 4.05 mm, respectively, indicating the more stable keyhole and alleviated collapse. Both the actual in-situ capture of molten pool signature and porosity inside the weld corresponded to the analysis of the change in keyhole stability.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 7","pages":"Pages 3166-3185"},"PeriodicalIF":13.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141842577","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":"Microstructure and mechanical behavior of Mg/Al composite plates with different thicknesses of Ti foil interlayer","authors":"Jian Li ,&nbsp;Bo Feng ,&nbsp;Xiaowei Feng ,&nbsp;Xianhua Chen ,&nbsp;Kaihong Zheng ,&nbsp;Xianquan Jiang ,&nbsp;Fusheng Pan","doi":"10.1016/j.jma.2024.07.008","DOIUrl":"10.1016/j.jma.2024.07.008","url":null,"abstract":"<div><div>In this study, microstructure and mechanical behavior of Mg/Al composite plates with Ti foil interlayer were systematically studied, with a great emphasis on the effect of different thicknesses of Ti foil interlayer. The results show that compared to 100 µm thick Ti foil, 10 µm thick Ti foil is more prone to fracture and is evenly distributed in fragments at the interface. The introduction of Ti foil can effectively refine the grain size of Mg layers of as-rolled Mg/Al composite plates, 10 µm thick Ti foil has a better refining effect than 100 µm thick Ti foil. Ti foil can effectively increase the yield strength (YS) and ultimate strength (UTS) of as-rolled Mg/Al composite plates, 10 µm thick Ti foil significantly improves the elongation (El) of Mg/Al composite plate, while 100 µm thick Ti foil slightly weakens the El. After annealing at 420 °C for 0.5 h and 4 h, Ti foil can inhibit the formation of intermetallic compounds (IMCs) at the interface of Mg/Al composite plates, which effectively improves the YS, UTS and El of Mg/Al composite plates. In addition, Ti foil can also significantly enhance the interfacial shear strength (SS) of Mg/Al composite plates before and after annealing.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 7","pages":"Pages 3237-3251"},"PeriodicalIF":13.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828045","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":"Mechanism of work hardening and softening behavior of AZ31 magnesium alloy sheets with hard plate accumulative roll bonding","authors":"Lu Sun ,&nbsp;Feng Li ,&nbsp;Jia Yang Zhang ,&nbsp;Wen Tao Niu ,&nbsp;Mu Zi Cao","doi":"10.1016/j.jma.2024.10.003","DOIUrl":"10.1016/j.jma.2024.10.003","url":null,"abstract":"<div><div>In this paper, the work hardening and softening behavior of AZ31 magnesium alloy sheets by hard plate accumulative roll bonding (HP-ARB) process in a specific temperature range was studied for the first time, and the cyclic stress relaxation test, EBSD, TEM and other characterization methods were used. When the rolling temperature is 350 °C, the grain size of magnesium sheets is refined to 4.32 (±0.36) µm on average, and it shows an excellent combination of strength and plasticity. The tensile strength reaches 307 (±8.52) MPa and the elongation is 12.73 (±0.84)%. At this time, the curve of work hardening rate decreases smoothly and the degree of hardening is the lowest, and the amplitude of stress drop Δσ_p in work softening test is the smallest with the increase of cycle times, which shows that the well coordination between work hardening and softening behavior has been achieved. Research has found that the combined effect of grain boundary strengthening and fine grain strengthening enhances the yield and tensile strength of magnesium sheets after three passes HP-ARB process at 350 °C. This is attributed to the high degree of dislocation slip opening in the pyramidal surface 〈a〉 and 〈<em>c</em> + <em>a</em>〉, which not only coordinates the c-axis strain of the entire grain, but also promotes the slip transfer of dislocations in the fine-grained region, significantly improving the elongation of the sheets. This study provides a new idea for the forming and manufacturing of high performance magnesium alloy sheets.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 7","pages":"Pages 3430-3449"},"PeriodicalIF":13.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142597025","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":"Modifying hydrogen storage properties of the RE−Mg-based alloys with minor Sc addition","authors":"Hanfeng Sun ,&nbsp;Peng Sheng ,&nbsp;Jun Li ,&nbsp;Shihai Guo ,&nbsp;Qilu Ge ,&nbsp;Yanghuan Zhang","doi":"10.1016/j.jma.2024.11.034","DOIUrl":"10.1016/j.jma.2024.11.034","url":null,"abstract":"<div><div>To address the challenges posed by high reaction temperatures and the slow kinetics of Mg-based alloys with high hydrogen storage density, Mg−RE−TM (RE = rare earth, TM = metallic element) alloys have been extensively researched and hold great promise. In this study, a series of Mg−RE−TM based Mg₉₀Y₂Ce₂Ni₃Al_3-<em>_x</em>Sc<em>_x</em> (<em>x</em> = 0, 0.3, 0.6, 0.9, 1.2) alloys were prepared. The addition of Sc element has been found to enhance the activation and kinetic properties of the alloy. Compared with the significant differences in the first four dehydrogenation curves of the Sc0 sample, the first activated dehydrogenation curve of the Sc1.2 alloy overlaps with the fully activated dehydrogenation curve. The dehydrogenation activation energy decreased from 96.56 kJ/mol in the Sc0 alloy to 63.69 kJ/mol in the Sc0.9 alloy. Through analysis of the microstructure, phase composition, and hydrogen absorption and desorption kinetics of the alloy, the mechanisms for improving the hydrogen storage properties of the alloy were elucidated. The nucleation-growth-impingement Avrami model was employed to accurately simulate the hydrogen storage kinetics. The results showed that stage II was prolonged and accelerated at high temperature, and the growth rate and hydrogen storage of stage I were increased at low temperature in hydrogen absorption. Microstructure analysis revealed the presence of Mg, CeMg₁₂, Mg₄₇Y, and YNi₂Al₃ phases in the Sc0 sample. Upon the addition of Sc element, a new phase, ScNiAl, was formed, and the coarse grain size of the main phase was significantly refined. This refinement provides faster diffusion channels for hydrogen atoms, accelerating the phase transition between Mg alloys and hydrides. The microstructure changes explain the improved activation properties, effective hydrogen absorption and desorption capacity, and kinetic properties of the Mg-based samples.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 7","pages":"Pages 3306-3322"},"PeriodicalIF":13.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874655","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":"Tensile creep anisotropy and its weakening mechanism in a dilute Mg-Ca alloy","authors":"Limin Wang ,&nbsp;Sijia Hu ,&nbsp;Chun Xi ,&nbsp;Weiwei Zhou ,&nbsp;Taku Sakai ,&nbsp;Xuyue Yang ,&nbsp;Qinghuan Huo","doi":"10.1016/j.jma.2024.12.002","DOIUrl":"10.1016/j.jma.2024.12.002","url":null,"abstract":"<div><div>The tensile creep anisotropy of a dilute-alloyed Mg-0.3wt%Ca sheet is investigated along the rolling direction (RD) and normal direction (ND). Strong creep anisotropy is shown between the RD and ND, owing to the easy twinning and the Ca-segregation along twin boundaries during creep loading along the ND. To weaken the creep anisotropy, hot-compression parallel to the RD-ND plane is performed and the continuous dynamic recrystallization mechanism induces a bimodal microstructure with the coexistence of unrecrystallized and recrystallized grains. The creep anisotropy is successfully weakened after hot-compression, and the creep resistance is also significantly enhanced along both loading directions. With the assistance of microstructural characterization, the weakened creep anisotropy is ascribed to the dislocation arrays in the interiors of recrystallized grains and the Ca-segregation along the boundaries of recrystallized grains. Compared to commercial Mg alloys with poor creep property and rare-earth alloyed Mg with high price, good creep performance and low production cost can be synchronously realized in the hot-compressed Mg-0.3wt%Ca alloy. Thus, this work proposes a new perspective for producing creep-resistant Mg alloys.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 7","pages":"Pages 3223-3236"},"PeriodicalIF":13.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825588","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":"Evaluation of damage evolution in pure magnesium during surrogate high-energy electron irradiation for Brachytherapy seed application","authors":"Hucheng Yu ,&nbsp;Sichen Dong ,&nbsp;Qi Chen ,&nbsp;Xiaoou Yi ,&nbsp;Hui Liu ,&nbsp;Hao Fang ,&nbsp;Wentuo Han ,&nbsp;Pingping Liu ,&nbsp;Somei Ohnuki ,&nbsp;Farong Wan","doi":"10.1016/j.jma.2025.04.010","DOIUrl":"10.1016/j.jma.2025.04.010","url":null,"abstract":"<div><div>Evaluation of damage evolution effects in biodegradable pure Mg was carried out, using transmission electron microscope as surrogate irradiation for high-energy radionuclide β decay in Brachytherapy. Time-dependent quantitative defect production, evolution dynamics, and evolution statistics were revealed <em>in-situ</em> for two prism foils (<strong><em>z</em></strong> = [<span><math><mrow><mn>1</mn><mrow><mover><mn>2</mn><mo>¯</mo></mover><mn>10</mn></mrow></mrow></math></span>], [<span><math><mrow><mn>10</mn><mrow><mover><mn>1</mn><mo>¯</mo></mover><mn>0</mn></mrow></mrow></math></span>]), in as-received and heat-treated pure Mg, after 300 keV electron irradiation up to 0.468 dpa at R.T. Preferred nucleation of basal-plane interstitial-type 1/6 &lt;<span><math><mrow><mn>20</mn><mrow><mover><mn>2</mn><mo>¯</mo></mover><mn>3</mn></mrow></mrow></math></span>&gt; loops was confirmed, in addition to a small portion of prism-plane 1/3 &lt;<span><math><mrow><mn>11</mn><mrow><mover><mn>2</mn><mo>¯</mo></mover><mn>0</mn></mrow></mrow></math></span>&gt; loops. No cavities were found. A higher yield of point defect concentration and a more evident trend of defect coarsening were identified in [<span><math><mrow><mn>1</mn><mover><mn>2</mn><mo>¯</mo></mover><mn>10</mn></mrow></math></span>] than in [<span><math><mrow><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>0</mn></mrow></math></span>]. Pre-existing dislocations (on the orders of 10¹³−10¹⁴ <em>m</em>⁻²) in pure Mg resulted in a delay of the first occurrence of visible defects. Defect migration and elastic interactions governed the microstructural evolution of electron irradiation damage in pure Mg, giving rise to events of loop coalescence, growth, and sometimes rotation of habit plane. The influence of incident electron energy can be correlated to the rates of point defect production, and is quantifiable; however, interfered by defect cluster stability, defect mobility, and defect interactions. This forms an important theoretical basis for the application of Mg subjected to MeV-level β-decay radiation in Brachytherapy. The paper concludes with a brief comparison between Mg and conventional Ti casing, outlines the advantages and challenges, and provides reference points for the validation of Mg/Mg-alloys in Brachytherapy seed application.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 7","pages":"Pages 3104-3121"},"PeriodicalIF":13.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931120","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}