Journal of Magnesium and Alloys最新文献

Multi-scale interface strengthening mechanism of Mg/Al clad plates achieved by prefabricated corrugated rolling 预制波纹轧制镁铝复合板的多尺度界面强化机制

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2026-10-01 Epub Date: 2026-10-13 DOI: 10.1016/j.jma.2026.102144

Yuanming Liu, Kaiye Li, Jingwei Li, Yanxiao Liu, Zhenhua Wang, Dongping He, Tao Wang

{"title":"Multi-scale interface strengthening mechanism of Mg/Al clad plates achieved by prefabricated corrugated rolling","authors":"Yuanming Liu, Kaiye Li, Jingwei Li, Yanxiao Liu, Zhenhua Wang, Dongping He, Tao Wang","doi":"10.1016/j.jma.2026.102144","DOIUrl":"10.1016/j.jma.2026.102144","url":null,"abstract":"<div><div>To address the issue of low interfacial bonding strength in Mg/Al clad plates, a prefabricated corrugated rolling (PCR) process is proposed. A combined approach of finite element simulation and experimental methods is employed to investigate the stress-strain evolution during rolling, as well as the effects of PCR process on the microstructure and mechanical properties of the clad plates. The results indicate that the bonding strength is significantly enhanced by the PCR process, with the trough, waist, and peak regions reaching 111.27, 110.43, and 108.55 MPa, respectively-approximately 34% higher than the FR plate. The PCR process introduces an inhomogeneous stress state during rolling, the trough region experiences compressive stress for the longest duration, triggering severe plastic deformation at the interface and matrix. The waist region generates the highest equivalent strain under the synergistic effect of compressive and shear stress. The peak region enhances the interface deformation effect by virtue of transverse metal flow. This complex stress strain state promotes grain refinement of the Mg and Al matrices, increases the dynamic recrystallization fraction of the Mg side and elevates the dislocation density of the Al side. Furthermore, it induces the formation of dislocation structures in the Mg side near-interface region and a nanocrystalline transition layer in the Al side near-interface region, achieving multi-scale reinforcement of interface microstructure. The PCR process can optimize the microstructural evolution of the interface by regulating stress distribution, providing a new insight for improving the performance of layered metal composites.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"23 ","pages":"Article 102144"},"PeriodicalIF":15.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149199560","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}

引用次数: 0

Synergetic enhancement of corrosion resistance in ZM2 magnesium alloy via a hybrid cold spraying/micro-arc oxidation duplex coating 冷喷涂/微弧氧化复合涂层协同增强ZM2镁合金耐蚀性

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2026-09-01 Epub Date: 2026-09-03 DOI: 10.1016/j.jma.2026.102206

Chaochao Zhao, Yaxin Xu, Weihan Liu, Tianxiao Tian, Wenya Li

{"title":"Synergetic enhancement of corrosion resistance in ZM2 magnesium alloy via a hybrid cold spraying/micro-arc oxidation duplex coating","authors":"Chaochao Zhao, Yaxin Xu, Weihan Liu, Tianxiao Tian, Wenya Li","doi":"10.1016/j.jma.2026.102206","DOIUrl":"10.1016/j.jma.2026.102206","url":null,"abstract":"<div><div>In this study, a duplex coating consisting of an initial cold-sprayed (CS) Al underlayer and a subsequent micro-arc oxidation (MAO) top-layer was developed on a ZM2 cast Mg alloy substrate to enhance its corrosion resistance. The role of the CS Al underlayer in regulating the microstructural evolution, phase transformation, and corrosion behavior was systematically investigated. Surface polishing of the CS (CS(P)) layer reduces roughness and homogenizes the electric field during the following MAO treatment, thereby suppressing localized micro-discharges and promoting the formation of a denser and more uniform ceramic layer. The analyses reveal that the MAO layer consists γ-Al<sub>2</sub>O<sub>3</sub> nanocrystals embedded in an amorphous matrix. This kind of structure effectively minimizes the pore formation and improves the coating integrity of the MAO layer. Electrochemical measurements demonstrate that a significant enhancement in corrosion resistance has been achieved. The corrosion current density decreases by 3 orders of magnitude, while the polarization resistance increases to 2.38 × 10<sup>5</sup> Ω·cm<sup>2</sup>, approximately 280 times higher than that of the bare ZM2 substrate. During 14-day long-term immersion, the CS(P)+MAO duplex coating exhibits exceptional stability, with a negligible cumulative hydrogen evolution (0.65 mL·cm<sup>−2</sup>) and a superior corrosion rate (0.124 mm·y<sup>−1</sup>). Surface characterizations of the CS(P)+MAO duplex coating reveal no evident macroscopic pitting or microcracks. The excellent corrosion resistance of the CS(P)+MAO bilayer coating arises from the synergistic protection provided by a dense microstructure, the physical barrier of the CS Al underlayer, and the chemical stability and high interfacial resistance of the γ-Al<sub>2</sub>O<sub>3</sub>-rich ceramic phase in the MAO top-layer.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"22 ","pages":"Article 102206"},"PeriodicalIF":15.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148893912","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}

引用次数: 0

Super corrosion-resistance and self-passivity of a magnetron-sputtered Mg-Y-Al alloy 磁控溅射mg - y -铝合金的超耐蚀性和自钝化性能

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2026-09-01 Epub Date: 2026-09-25 DOI: 10.1016/j.jma.2026.102208

Weili Zhou, Guang-Ling Song

{"title":"Super corrosion-resistance and self-passivity of a magnetron-sputtered Mg-Y-Al alloy","authors":"Weili Zhou, Guang-Ling Song","doi":"10.1016/j.jma.2026.102208","DOIUrl":"10.1016/j.jma.2026.102208","url":null,"abstract":"<div><div>The poor corrosion resistance, particularly the disastrous galvanic corrosion, poses a huge challenge to the application of magnesium (Mg) alloys in industry. To address such a critical issue, this study explored the possibility of fabricating a super corrosion-resistant and self-passive Mg alloy through magnetron-sputtering. The experimental results indicated that the crystallography and microstructure of the magnetron-sputtered ternary alloy Mg-Y-Al could be modified by Y and Al alloying. With the optimized composition around Mg<sub>63</sub>Y<sub>34</sub>Al<sub>3</sub>, the alloy had a corrosion rate lower than 0.02 mm/year or 5 × 10<sup>−7</sup> A/cm<sup>2</sup>, nearly 1 order lower than those of all the reported Mg alloys. It also had undetectable hydrogen evolution and nearly 100% anodic efficiency. Its passive current density was around ∼2 × 10<sup>−6</sup>A/cm<sup>2</sup>, very close to that of a typical stainless steel. This magnetron-sputtered corrosion-resistant self-passive Mg alloy could be deposited on a typical Mg alloy AZ91 as a coating to effectively inhibit the corrosion of the substrate in an artificial seawater. Even in the case that the coating was mechanically damaged, it exhibited a great self-healing behavior and continuously inhibited the corrosion in the damaged area, because a Y₂O₃-rich passive film could be rapidly formed on the surface. The new understanding of the super corrosion resistance and self-passivity of the Mg alloy may be utilized in the development of galvanic-corrosion-resistant Mg alloys, and the high anodic efficiency mechanism may even lay a foundation for the use of some innovative Mg alloys as an anode in battery and as a biodegradable implant in human body.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"22 ","pages":"Article 102208"},"PeriodicalIF":15.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149051269","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}

引用次数: 0

The fabrication of Mg-Zn-Y-Nd minitubes via cyclic extrusion compression and hot drawing for vascular stent applications 通过循环挤压压缩和热拉伸制备用于血管支架的Mg-Zn-Y-Nd微型管

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2026-09-01 Epub Date: 2026-06-23 DOI: 10.1016/j.jma.2026.102175

Wenkai Li, Yabo Zhang, Yuzeng Zhou, Zehao Niu, Di Mei, Liguo Wang, Shijie Zhu, Shaokang Guan

{"title":"The fabrication of Mg-Zn-Y-Nd minitubes via cyclic extrusion compression and hot drawing for vascular stent applications","authors":"Wenkai Li, Yabo Zhang, Yuzeng Zhou, Zehao Niu, Di Mei, Liguo Wang, Shijie Zhu, Shaokang Guan","doi":"10.1016/j.jma.2026.102175","DOIUrl":"10.1016/j.jma.2026.102175","url":null,"abstract":"<div><div>Precision magnesium alloy minitubes are key raw materials used in the manufacture of magnesium alloy vascular stents. However, the poor room-temperature formability of magnesium alloys limits the production of high-performance precision minitubes through conventional cold drawing methods. In this study, a combined process of cyclic extrusion compression (CEC) and hot drawing was proposed to manufacture the Mg alloy minitubes. The results show that CEC produces a fine grain with an average size of approximately 1.96 µm, and providing a favorable microstructure for subsequent hot drawing. As the temperature rises from 25 °C to 250 °C, the deformation mechanism of CEC processed ZE21B magnesium alloy transitions from basal slip and twin to prismatic and pyramidal slips, further activating two {10<span><math><mover><mn>1</mn><mo>¯</mo></mover></math></span>2} tensile twin variants, thereby, the cross-section reduction rate (CRR) during one pass increases from 21.45 % to 46.24 %. The minitubes with a wall thickness of 0.14 mm are fabricated using only four drawing passes and one final annealing via hot drawing at 250 °C, whereas conventional cold drawing requires six passes and five annealing passes. Moreover, the final hot drawn minitubes containing two twin variants induce an S-shaped stress-strain curve with ultimate tensile strength (UTS) of 273.5 ± 6.6 MPa, an elongation (EL) of 22.7 ± 0.2 %, its yield ratio (YR) is approximately 0.5 indicating better suitability for subsequent stent deformation. Meanwhile, a high density of twin boundary suppresses preferential grain boundary corrosion, result in a uniform corrosion morphology and improve the corrosion resistance. This study offers theoretical foundation and a novel processing route for the manufacture of biodegradable Mg alloy stents.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"22 ","pages":"Article 102175"},"PeriodicalIF":15.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148311859","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}

引用次数: 0

Mg‑based solid‑state hydrogen storage: From materials engineering to intelligent system design 镁基固态储氢：从材料工程到智能系统设计

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2026-09-01 Epub Date: 2026-07-03 DOI: 10.1016/j.jma.2026.102185

Zheyu Liu, Longfei Shao, Bolun Wang, Yingyan Zhao, Xi Lin, Jianxin Zou

引用次数: 0

Chemisorption-dominated organic–silicate hybrid anchoring on porous MgO for durable corrosion protection of AZ31 Mg alloy 化学吸附为主的有机硅酸盐杂化锚定在多孔MgO上对AZ31镁合金的持久腐蚀防护

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2026-09-01 Epub Date: 2026-06-23 DOI: 10.1016/j.jma.2026.102177

Mosab Kaseem, Talitha Tara Thanaa, Murad M.A. Abualrejal, Mohammad Alkaseem, Arash Fattah-alhosseini

{"title":"Chemisorption-dominated organic–silicate hybrid anchoring on porous MgO for durable corrosion protection of AZ31 Mg alloy","authors":"Mosab Kaseem, Talitha Tara Thanaa, Murad M.A. Abualrejal, Mohammad Alkaseem, Arash Fattah-alhosseini","doi":"10.1016/j.jma.2026.102177","DOIUrl":"10.1016/j.jma.2026.102177","url":null,"abstract":"<div><div>A chemically and electronically driven surface engineering strategy is presented to enhance the corrosion resistance of AZ31 Mg alloy through interfacial hybridization within a porous oxide framework. A porous MgO layer was first generated via anodic plasma-assisted oxidation, producing a chemically active surface enriched with Mg²⁺ sites. Subsequent hydrothermal functionalization with L-tryptophan and a silane precursor yielded a consolidated Trp–siloxane hybrid coating (Hyb@MgO) that infiltrates and seals the intrinsic porosity of the oxide layer. Structural and surface characterizations confirm the formation of a chemically integrated network rather than a discrete overlayer. Electrochemical evaluation in chloride-containing media shows that Hyb@MgO exhibits a markedly ennobled corrosion potential, an ultralow corrosion current density on the order of 10⁻⁹ A·cm⁻², and a low-frequency impedance modulus approaching 5 × 10⁷ Ω·cm², indicating robust barrier performance under the applied test conditions. In contrast, applying the same Trp–TEOS treatment directly to bare AZ31 produces a weak, discontinuous surface film with only marginal corrosion improvement, highlighting the essential role of the porous MgO interlayer. DFT and Monte Carlo simulations further demonstrate that Trp–TEOS co-condensation forms an electronically activated Trp–Si(OH)₃ hybrid that enables chemisorption-dominated anchoring on MgO, accounting for the enhanced interfacial stability and corrosion resistance beyond simple physical pore sealing.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"22 ","pages":"Article 102177"},"PeriodicalIF":15.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148311858","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}

引用次数: 0

Cathodic secondary phases enable protective tribocorrosion layers in magnesium alloys 阴极二次相在镁合金中形成保护性摩擦腐蚀层

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2026-09-01 Epub Date: 2026-06-11 DOI: 10.1016/j.jma.2026.102155

Yue Xiang, Yaping Zhang, Yuntian Zhu, Xiang Chen

{"title":"Cathodic secondary phases enable protective tribocorrosion layers in magnesium alloys","authors":"Yue Xiang, Yaping Zhang, Yuntian Zhu, Xiang Chen","doi":"10.1016/j.jma.2026.102155","DOIUrl":"10.1016/j.jma.2026.102155","url":null,"abstract":"<div><div>Secondary phases strongly influence the degradation behavior of magnesium alloys, yet their role in tribocorrosion remains unclear. This study demonstrates that cathodic secondary phases can significantly enhance the tribocorrosion resistance of binary magnesium-rare-earth (Mg-RE) alloys through a mechanochemical synergy. Two coarse-grained Mg-RE systems were examined: solid-solution alloys and second-phase reinforced alloys. Although their wear rates were similar under dry sliding, their tribocorrosion responses diverged sharply. In solid-solution alloys, a thin (∼200 nm) nanograined MgO layer repeatedly ruptured and repassivated, leading to a drop in open circuit potential (OCP), severe subsurface deformation and accelerated wear under tribocorrosion. In contrast, second-phase reinforced alloys exhibited exceptional tribocorrosion resistance through formation of a micrometer-thick tribocorrosion layer. The cathodic secondary phases promoted localized oxidation and deep oxygen diffusion along phase boundaries, thereby substantially accelerating the growth of the tribocorrosion layer, while their in-situ oxidation into stable rare earth oxides reinforced the tribocorrosion layer. These mechanisms stabilized the OCP and protected the underlying matrix, which retained coarse grains with minimal deformation. These findings reveal that cathodic secondary phases can be strategically utilized to engineer robust, self-reinforcing tribocorrosion layers, overturning their conventional detrimental role in corrosion.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"22 ","pages":"Article 102155"},"PeriodicalIF":15.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149211354","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}

引用次数: 0

Investigating twin boundary-dislocation interactions in Mg-Y using quasi in-situ nanoindentation and electron channeling contrast imaging 利用准原位纳米压痕和电子通道对比成像研究Mg-Y中孪晶界位错相互作用

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2026-09-01 Epub Date: 2026-07-15 DOI: 10.1016/j.jma.2026.102205

Fatim Zahra Mouhib, Hexin Wang, Julien Guénolé, Stéphane Berbenni, Talal Al Samman, Thiebaud Richeton, Zhuocheng Xie, Antoine Guitton

{"title":"Investigating twin boundary-dislocation interactions in Mg-Y using quasi in-situ nanoindentation and electron channeling contrast imaging","authors":"Fatim Zahra Mouhib, Hexin Wang, Julien Guénolé, Stéphane Berbenni, Talal Al Samman, Thiebaud Richeton, Zhuocheng Xie, Antoine Guitton","doi":"10.1016/j.jma.2026.102205","DOIUrl":"10.1016/j.jma.2026.102205","url":null,"abstract":"<div><div>Defect–grain boundary interactions have been proven essential for the development of tailored microstructures for high-performance materials. We aim to unravel the mechanical response of grain boundaries by investigating dislocation activity in the vicinity of a tensile twin boundary (TB) in Mg-Y. A combined approach of quasi in-situ nanoindentation, electron channeling contrast imaging (ECCI), and high-resolution electron backscattered diffraction (HR-EBSD) was employed to induce localized deformation and analyze the resulting TB response. Nanoindentation in the parent grain near the TB produces distinct pop-ins, indicating deformation events close to the boundary. Observed slip includes pyramidal <span><math><mrow><mo>〈</mo><mi>c</mi><mo>+</mo><mi>a</mi><mo>〉</mo></mrow></math></span> activity in the twin and prismatic slip in the parent grain. It is shown that dislocation pile-ups cause TB bulging rather than transmission, which is consistent with low slip transmission factors. However, limited slip transmission is observed. Peach–Koehler force calculations based on the Nye tensor and the elastic strain extracted from 2D HR-EBSD measurements confirm that TB motion may be induced by dislocation pile-ups.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"22 ","pages":"Article 102205"},"PeriodicalIF":15.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148460238","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}

引用次数: 0

Rare earth redistribution governs competitive surface oxidation and grain refinement equilibrium in magnesium alloys 稀土重分布控制着镁合金的竞争性表面氧化和晶粒细化平衡

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2026-09-01 Epub Date: 2026-09-15 DOI: 10.1016/j.jma.2026.102231

Hualuo Pang, Weiyun Xu, Jinge Liu, Haojing Xu, Zhengguang Wang, Fei Song, Yun Tian, Peng Wen

{"title":"Rare earth redistribution governs competitive surface oxidation and grain refinement equilibrium in magnesium alloys","authors":"Hualuo Pang, Weiyun Xu, Jinge Liu, Haojing Xu, Zhengguang Wang, Fei Song, Yun Tian, Peng Wen","doi":"10.1016/j.jma.2026.102231","DOIUrl":"10.1016/j.jma.2026.102231","url":null,"abstract":"<div><div>WE43 magnesium alloy, mainly alloyed with rare earth (RE) elements including Y, Nd and Gd, possesses important application prospects in lightweight structural components and biodegradable biomedical fields. Its corrosion resistance and mechanical integrity are highly dependent on microstructure evolution regulated by RE elements. During high temperature processes, the RE solutes in WE43 can redistribute between the alloy surface and the substrate, which makes passivation at the surface and microstructure evolution in the bulk mutually influential, and significantly determines the biodegradable and mechanical responses. Here, laser powder bed fusion-fabricated WE43 alloy was used as a model system to clarify how RE redistribution governs the coupled evolution of surface oxide layer, transition zone, and substrate microstructure. The results show that the intermediate redistribution produces the most favorable architecture, combining a continuous RE enriched oxide layer with a spatially uniform fine-grained substrate. In contrast, prolonged high-temperature oxidation produces a well-developed oxide layer but depletes RE in the transition zone and promotes grain coarsening and microstructural heterogeneity through continued outward RE diffusion. Such unbalanced microstructure shows poorer mass loss resistance and mechanical retention, demonstrating that the development of surface oxide layer alone does not determine corrosion resistance. These findings reveal a competitive surface oxidation and grain refinement equilibrium, termed CORE, in which surface passivation and microstructural stabilization compete due to the RE redistribution during high temperature processes. This framework shifts the design focus of thermally processed RE containing magnesium alloys from maximizing the protection of surface oxide layer alone toward balancing oxide layer growth and grain refinement stability.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"22 ","pages":"Article 102231"},"PeriodicalIF":15.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148984755","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}

引用次数: 0

Grain-scale plastic deformation characteristics and corresponding local plasticity effects in Mg-Y-Nd-Zr-Gd alloys: A multi-strategy in situ experimental study Mg-Y-Nd-Zr-Gd合金晶粒塑性变形特征及局部塑性效应：多策略原位试验研究

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2026-09-01 Epub Date: 2026-09-03 DOI: 10.1016/j.jma.2026.102240

Luyi Han, Yanan Yu, Dejing Wei, Ximan Sun, Yongjian Wang, Liping Zhong, Riliang Liu, Jian Han, Zhengyi Jiang, Guoqun Zhao, Guangchun Wang

{"title":"Grain-scale plastic deformation characteristics and corresponding local plasticity effects in Mg-Y-Nd-Zr-Gd alloys: A multi-strategy in situ experimental study","authors":"Luyi Han, Yanan Yu, Dejing Wei, Ximan Sun, Yongjian Wang, Liping Zhong, Riliang Liu, Jian Han, Zhengyi Jiang, Guoqun Zhao, Guangchun Wang","doi":"10.1016/j.jma.2026.102240","DOIUrl":"10.1016/j.jma.2026.102240","url":null,"abstract":"<div><div>The synergistic interplay between grain boundary compatibility, dislocation slip, and twinning governs the mechanical response of magnesium alloys; however, the underlying micromechanical driving mechanisms—particularly the grain-scale interactions—remain elusive. In this study, we resolve the intricate spatiotemporal evolution of localized stress and strain fields in a Mg-Y-Nd-Zr-Gd alloy through a multi-modal in-situ characterization framework, integrating SEM/EBSD, high-resolution digital image correlation (HR DIC), and high-angular resolution EBSD (HR EBSD). Quantitative mapping reveals a profound strain partitioning effect, where the peak localized strain reaches approximately 15 times the macroscopic average. We demonstrate that the activation of low-Schmid-factor twins is a non-spontaneous process triggered by stress excitation from adjacent dislocation pile-ups. Although twinning effectively accommodates interfacial shear strains, the normal strain components can hardly be transmitted across the interface via twinning, and also highly localized stress and strain concentrations are generated at the twin tips. In addition, basal slip is found to possess adaptive characteristics, ensuring interfacial deformation compatibility by dynamically regulating its strain contribution. The revealed micromechanical insights into dislocation-twin-grain boundary interactions offer significant guidance for the microstructural optimization and alloy design of high-strength magnesium alloys.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"22 ","pages":"Article 102240"},"PeriodicalIF":15.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148883610","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}

引用次数: 0