Journal of Materials Research and Technology-Jmr&t最新文献_第10页

Corrigendum to “Synergistic effect of solution-aging on phase evolution and high-temperature creep resistance in inertia-friction-welded Ti–6Al–4V aerospace components” [J Mater Res Technol Volume 38, September–October 2025, Pages 2875-2885] “固溶时效对Ti-6Al-4V航空部件的相演化和高温蠕变抗力的协同效应”[J] .材料与技术，vol . 38, 2009, page 2875-2885]

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-06 DOI: 10.1016/j.jmrt.2025.12.054

Weiying Huang

引用次数: 0

Quasi-static tensile and axial crushing behavior of an AZ31 magnesium alloy extrusion in different treated states AZ31镁合金挤压在不同处理状态下的准静态拉伸和轴向破碎行为

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-10 DOI: 10.1016/j.jmrt.2025.12.096

Zhipeng Li , Liqiang Zhang , Pengcheng Guo , Zhiwen Liu , Yuanzhi Wu , Tuo Ye , Xiao Liu , Biwu Zhu

Magnesium alloy extrusions have emerged as a key approach to achieving vehicle lightweighting, owing to their dual advantages in material properties and structural design. Therefore, figuring out the relationship between crushing deformation process, energy absorption characteristics, and thermomechanical processing state is crucial for further expanding the application of Mg extrusions. This paper mainly focuses on the deformation behavior under uniaxial tension and axial crushing with an AZ31 magnesium alloy extrusion in various treated states through mechanical tests, microscopic characterization and numerical simulation. The results show that the deformation behavior of the AZ31 magnesium alloy extrusion under uniaxial tension and axial crushing is significantly influenced by its initial microstructure determined by hot forming and subsequent heat treatment. After solution treatment, the yield strength (YS) and ultimate tensile strength (UTS) decrease from 230 MPa to 207 MPa and from 303 MPa to 295 MPa, respectively, while the elongation (EL) increases from 19.32 % to 24.08 %. Subsequent aging after solution treatment induces precipitation strengthening, which raises the YS to 234 MPa and UTS to 317 MPa, but results in a significant reduction in EL to 15.74 %. The plastic deformation of the as-extruded profile primarily relies on non-basal slip and limited twinning, with fracture surface exhibiting typical ductile-brittle mixed characteristics. After solution treatment, more tensile twins are activated to accommodate plastic deformation, resulting in a more ductile-oriented mixed fracture mode with fine distributed dimples. In contrast, the aged extrusion demonstrates the weakest deformation compatibility, with a local KAM reaching 18.88°, and exhibits a brittle-dominated mixed fracture mode. The as-extruded profile shows the highest energy absorption capacity and excellent structural strength, yet it exhibits relatively poor crushing stability. The solutionized extrusion exhibits the lowest energy absorption capacity due to its reduced strength, more pronounced load fluctuations during the initial crushing stage, and diminished deformation stability. In contrast, the aged extrusion achieves a more favorable balance between crushing load and deformation stability, thereby demonstrating relatively superior energy absorption capacity. The deformation mode and progressive evolution of the AZ31 magnesium alloy extrusion under axial crushing can be accurately captured using numerical simulation.

镁合金挤压件由于其在材料性能和结构设计上的双重优势，已成为实现汽车轻量化的关键途径。因此，弄清挤压变形过程、能量吸收特性与热处理状态之间的关系，对进一步扩大镁合金挤压件的应用具有重要意义。本文主要通过力学试验、微观表征和数值模拟研究AZ31镁合金挤压在不同处理状态下的单轴拉伸和轴向破碎变形行为。结果表明：AZ31镁合金在单轴拉伸和轴向挤压下的变形行为受热成形和后续热处理确定的初始组织的显著影响；固溶处理后，屈服强度（YS）和极限抗拉强度（UTS）分别从230 MPa和303 MPa降低到207 MPa和295 MPa，伸长率（EL）从19.32%提高到24.08%。固溶处理后的时效引起析出强化，使合金的YS和UTS分别提高到234 MPa和317 MPa，但EL显著降低至15.74%。挤压状态下型材的塑性变形主要依赖于非基底滑移和有限孪晶，断口呈现典型的韧脆混合特征。固溶处理后，更多的拉伸孪晶被激活以适应塑性变形，导致具有细分布韧窝的更具延性取向的混合断裂模式。时效挤压变形相容性最差，局部KAM为18.88°，呈现脆性为主的混合断裂模式。挤压形态的吸能能力和结构强度最高，但破碎稳定性相对较差。固溶化挤压由于其强度降低、破碎初期载荷波动更明显、变形稳定性降低而表现出最低的能量吸收能力。而时效挤压在破碎载荷和变形稳定性之间达到了较好的平衡，从而表现出相对优越的吸能能力。数值模拟可以准确地捕捉AZ31镁合金轴向挤压变形模式和挤压过程的演化过程。

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引用次数: 0

Effect of heat input on microstructures and mechanical properties in wire arc additive manufacturing of Co-free maraging steel 热输入对电弧增材制造无co马氏体时效钢组织和力学性能的影响

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-04 DOI: 10.1016/j.jmrt.2025.12.006

Liuke Song, Lei Wang, Xiaotian Zhang, He Li, Kui Zhang, Ziqi Liang, Xiaopeng Li, Yong Peng, Kehong Wang

The heat input is closely related to the microstructure and mechanical properties of Wire Arc Additive Manufacturing (WAAM) products. To investigate the influence mechanism of heat input on the microstructure and mechanical properties of Co-free maraging steel in WAAM, three thin-walled components under the varying heat inputs were fabricated. A systematic analysis of the microstructure and mechanical properties was conducted using numerical simulations combined with multiple characterization methods. The results indicated that the component with the lowest heat input (342 J/mm) exhibited the most favorable mechanical properties, achieving a tensile strength of 1249 MPa and an impact toughness of 62.5 J/cm². The properties progressively deteriorated with increasing heat input. Microstructural analysis revealed that the high cooling rate under low heat input effectively refined the grains, the primary dendrite arm spacing was reduced, and simultaneously increased proportion of high-angle grain boundaries and dislocation density, thereby enhancing the material strength and toughness. Furthermore, WAAM components exhibit pronounced microstructural variations across different orientations, leading to anisotropic mechanical properties. Under low heat input conditions, the lower texture strength significantly reduced anisotropy, with a 31 % decrease compared with that of the higher heat input components (497 J/mm). This study elucidates the mechanism by which heat input influences the mechanical properties through microstructural regulation, providing theoretical foundations for the process optimization of Co-free maraging steel in WAAM.

热输入与电弧增材制造（WAAM）产品的显微组织和力学性能密切相关。为了研究热输入对WAAM中无co马氏体时效钢组织和力学性能的影响机理，制备了三种不同热输入条件下的薄壁构件。采用数值模拟结合多种表征方法对其微观组织和力学性能进行了系统分析。结果表明：热输入最小（342 J/mm）的材料力学性能最佳，抗拉强度为1249 MPa，冲击韧性为62.5 J/cm2。随着热输入的增加，性能逐渐恶化。显微组织分析表明，低热输入下的高冷却速率有效细化了晶粒，减小了初生枝晶臂间距，同时增加了高角度晶界的比例和位错密度，从而提高了材料的强度和韧性。此外，WAAM组件在不同取向上表现出明显的微观结构变化，导致其力学性能各向异性。在低热输入条件下，较低的织构强度显著降低了各向异性，与高热输入组分（497 J/mm）相比，各向异性降低了31%。本研究阐明了热输入通过组织调控影响力学性能的机理，为WAAM中无co马氏体时效钢工艺优化提供了理论依据。

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引用次数: 0

Textural characterization of Northern Brazilian bauxites for geometallurgical modeling 巴西北部铝土矿的结构特征，用于地质冶金建模

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-12 DOI: 10.1016/j.jmrt.2025.12.012

Felipe Antonialli , Rafael dos Santos Macedo , Mauricio Guimarães Bergerman , Carina Ulsen

The texture of the bauxite from Porto Trombetas (Pará, Brazil) can be represented as halo (H), porcelanatic (P), grainy (G), and box-work (B) types. The influence of each texture on processing performance remains poorly understood. This work aims to evaluate whether the physicochemical properties and metallurgical behavior of bauxite are affected by bauxite texture type. Physical properties (density, porosity, moisture content, and grindability) were analyzed for 133 samples from two mines, representing the four textures. Chemical analysis was simultaneously conducted on 78 samples, to determine the major components, reactive silica, and available alumina. The samples were sub-grouped by porosity and texture. Phase-association, mineralogy and mechanical tests were examined through elemental mapping (μXRF and SEM-EDS), Rietveld refinements on X-ray diffractometry and Bond Index, respectively. The results demonstrated that porosity effectively indicates grindability and differentiates textures; whereas, drying rates are primarily controlled by reactive silica content. Deleterious minerals (mainly kaolinite) were not systematically enriched in the finer fraction (<0.037 mm). Elemental mapping provided insights into kaolinite-gibbsite interaction: in some textures, they are almost indistinguishable due to silica occlusion; whilst, in others, reactive silica is of limited significance. Texture B combines highly available alumina with low reactive silica textures. P and H exhibit pronounced weathering zones and intrinsic microporosity. G shows aluminum dilution due to the high quartz content. Microstructural analyses revealed distinct kaolinite-gibbsite associations and silica occlusion patterns. Integrating quantitative textural classification with metallurgical metrics can be a good way to perform a predictive and operationally relevant framework for optimizing beneficiation and enhancing resource utilization in tropical gibbsitic bauxites.

来自波尔图特朗贝塔斯（par，巴西）的铝土矿的纹理可以表示为晕状(H)，瓷状(P)，粒状(G)和盒状(B)类型。每种纹理对加工性能的影响仍然知之甚少。本工作旨在评价铝土矿的物理化学性质和冶金行为是否受到铝土矿结构类型的影响。分析了来自两个矿山的133个样品的物理性质（密度、孔隙率、含水率和可磨性），代表了四种纹理。同时对78个样品进行了化学分析，以确定主要成分，活性二氧化硅和有效氧化铝。根据孔隙度和质地对样品进行分组。通过元素映射（μXRF和SEM-EDS）、Rietveld细化（x射线衍射）和键合指数（Bond Index）分别进行了相关联、矿物学和力学测试。结果表明，孔隙度可以有效地指示可磨性并区分纹理；然而，干燥速率主要由活性二氧化硅含量控制。有害矿物（主要是高岭石）在较细粒（<0.037 mm）中没有系统富集。元素映射提供了高岭石-三沸石相互作用的见解：在一些纹理中，由于二氧化硅遮挡，它们几乎无法区分；然而，在其他情况下，活性二氧化硅的意义有限。质地B结合了高可用性氧化铝和低活性二氧化硅质地。P和H具有明显的风化带和固有的微孔隙。G表示铝因石英含量高而稀释。显微结构分析显示明显的高岭石-三水铝石组合和二氧化硅闭塞模式。将定量结构分类与冶金指标相结合，可为优化热带铝土矿选矿和提高资源利用率提供预测和操作相关的框架。

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引用次数: 0

Strengthening mechanisms in a heterostructured Fe34Mn20Co20Cr20Ni6 high-entropy alloy: Roles of grain interior, grain boundary, and hetero boundary 异质结构Fe34Mn20Co20Cr20Ni6高熵合金的强化机制：晶内、晶界和异质界的作用

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-04 DOI: 10.1016/j.jmrt.2025.12.032

Jialin Li , Hangyu Dong , Chengyang Hu , Guoxing Chen , Li Jia , Yuan Zhao , Lin Cheng , Xiangliang Wan , R.D.K. Misra , Kaiming Wu

This study systematically investigates the strengthening mechanisms in a heterostructured Fe₃₄Mn₂₀Co₂₀Cr₂₀Ni₆ high-entropy alloy (HEA), with a focus on the distinct roles of the grain interior, grain boundary, and hetero boundary. The novelty of this work lies in its controlled, multiscale methodology that successfully decouples these contributions. Nanoindentation tests combined with post-mortem electron backscatter diffraction (EBSD) characterizations reveal that fine grain (FG) regions exhibit higher nanohardness than coarse grain (CG) regions, due to their lower pre-existing dislocation density, which requires higher stress for dislocation nucleation. The enhanced strength-ductility balance is attributed to synergistic effects: i) Hetero boundaries demonstrate a superior strengthening effect due to driven by intensified strain and stress concentrations and hetero-deformation induced (HDI) hardening from coupled forward/back stresses. ii) A grain-size-dependent deformation mechanism is identified, with FG regions showing smaller activation volume compared to CG, suggesting a transition in dominant deformation mechanisms from dislocation slip to deformation twinning.

本文系统研究了异质结构Fe34Mn20Co20Cr20Ni6高熵合金（HEA）的强化机制，重点研究了晶粒内部、晶界和异质界的不同作用。这项工作的新颖之处在于其可控的多尺度方法成功地解耦了这些贡献。纳米压痕测试结合死后电子背散射衍射（EBSD）表征表明，细晶粒（FG）区域比粗晶粒（CG）区域具有更高的纳米硬度，这是由于细晶粒（FG）区域先前存在的位错密度更低，而位错成核需要更高的应力。增强的强度-延性平衡可归因于协同效应：i)由于应变和应力集中加剧以及前后耦合应力引起的异质变形诱导硬化（HDI）的驱动，异质边界表现出优越的强化效果。ii)确定了晶粒尺寸相关的变形机制，与CG相比，FG区域的激活体积更小，表明主要变形机制从位错滑移向变形孪晶转变。

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引用次数: 0

Effects of cold rolling routes on microstructure, texture evolution, and magnetic anisotropy of ultra-thin non-oriented electrical steel 冷轧路线对超薄无取向电工钢组织、织构演化和磁各向异性的影响

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-04 DOI: 10.1016/j.jmrt.2025.12.033

Fu-Xing Wang , Yin-Ping Wang , Fu-Qiang Li , Hong-Yu Song , Hai-Tao Liu

Achieving excellent magnetic properties and controlled magnetic anisotropy remains highly challenging for ultra-thin non-oriented electrical steel. In this study, 0.10 mm-thick 3.3Si-0.7Al (wt.%) non-oriented electrical steel was fabricated using one-stage and two-stage cold rolling routings with normalization, and two-stage cold rolling routing without normalization, respectively. The microstructure, texture evolution and magnetic properties were investigated comparatively. In particular, correlation between recrystallization texture, grain size, and magnetic anisotropy was revealed in detail. The one-stage cold rolling route finally produced the strongest γ- (<111>//ND) and α*-fiber ({1 1 h}<1 2 1/h>) recrystallization textures, and the smallest average grain size. Thus the lowest nominal magnetic induction B₅₀, the highest nominal iron losses P_10/400 and P_10/1000, and the lowest anisotropy in both iron loss and magnetic induction were displayed. In contrast, the two-stage cold rolling route without normalization finally produced stronger η- (<100>//RD) but weaker γ-fiber recrystallization texture, and bigger average grain size, hence higher nominal B₅₀ and lower nominal P_10/400 and P_10/1000 were obtained. The anisotropy of texture factor and grain size was much higher, resulting in higher anisotropy in magnetic induction and iron loss. For the two-stage cold rolling route with normalization, the λ-fiber (<001>//ND) recrystallization texture was finally formed along with the strongest η- but the weakest γ-fiber texture, and the largest average grain size. As a result, the highest nominal B₅₀, and the lowest nominal P_10/400 and P_10/1000 were acquired. However, the highest anisotropy of texture factor and grain size led to the highest anisotropy in magnetic induction and iron loss.

对于超薄无取向电工钢来说，获得优异的磁性能和可控的磁各向异性仍然是一个很大的挑战。在本研究中，分别采用一段、两段冷轧正火路线和两段冷轧不正火路线制备了0.10 mm厚3.3Si-0.7Al （wt.%）无取向电工钢。对其显微组织、织构演变和磁性能进行了比较研究。特别详细地揭示了再结晶织构、晶粒尺寸和磁各向异性之间的关系。一段冷轧方式最终产生了最强的γ- (<111>//ND)和α*纤维（{1 1 h}<1 2 1/h>）再结晶织构，平均晶粒尺寸最小。因此，最低的公称磁感应强度B50、最高的公称铁损耗P10/400和P10/1000，以及铁损耗和磁感应强度的最低各向异性。而不经正火处理的两段冷轧工艺最终产生了较强的η- (<100>//RD)，但较弱的γ-纤维再结晶织构和较大的平均晶粒尺寸，从而获得较高的公称B50和较低的公称P10/400和P10/1000。织构因子和晶粒尺寸的各向异性较大，导致磁感应强度和铁损的各向异性较大。正火两段冷轧路线最终形成λ-纤维（<001>//ND）再结晶织构，η-织构最强，γ-织构最弱，平均晶粒尺寸最大。结果获得最高标称B50，最低标称P10/400和P10/1000。织构因子和晶粒尺寸的各向异性最大，导致磁感应强度和铁损失各向异性最大。

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引用次数: 0

Effects of Mo addition on the mechanical properties and Cl− corrosion behavior of TA18 titanium alloy: Experimental and DFT computational study Mo添加对TA18钛合金力学性能和Cl -腐蚀行为的影响：实验和DFT计算研究

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-09 DOI: 10.1016/j.jmrt.2025.12.065

Xu Yang , Hai Long Wu , Huacheng Guan , Baicheng Xi , Qian Ma , Yunfei Ding

The dual challenge of achieving high structural strength and maintaining resistance to chloride-induced degradation has limited the wider application of TA18 (Ti–3Al–2.5 V) titanium alloy in deep-sea environments. This study systematically investigates the corrosion behavior and mechanisms of TA18–xMo (x = 0, 2, 4, 6, and 8 wt%) alloys experimentally in chloride-rich environments, while density functional theory (DFT) calculations were performed on ideal vacuum surfaces to elucidate the intrinsic electronic effects of Mo addition on the work function and surface electronic structure. The TA18–6Mo alloy exhibited optimal mechanical properties, with a compressive yield strength of 1112 MPa and an ultimate compressive strength of 1611 MPa—nearly double those of the base TA18 alloy. Corrosion resistance increased steadily with Mo content. At 8 wt% Mo, the corrosion current density decreased by ∼70 % relative to TA18, while the passive film resistance (R_p) reached 2.375 × 10⁶ Ω cm², over ten times higher than that of the base alloy. DFT calculations revealed that Mo addition raises the work function, thereby suppressing anodic dissolution. After 5 days of immersion in 5 mol/L HCl, the TA18–8Mo alloy exhibited only 30 % of the mass loss observed for TA18. XPS analysis confirmed the formation of a dense TiO₂–MoO₃ composite passive film on the alloy surface. These findings demonstrate that single-element Mo alloying provides a simple and effective strategy to enhance both strength and corrosion resistance of TA18, while the established quantitative link between work function and corrosion behavior offers new theoretical guidance for designing high-performance titanium alloys for deep-sea applications.

TA18 （Ti-3Al-2.5 V）钛合金在深海环境中的广泛应用面临着高结构强度和抗氯化物降解的双重挑战。本研究系统地研究了TA18-xMo （x = 0、2、4、6和8 wt%）合金在富氯化物环境中的腐蚀行为和机理，并在理想真空表面进行了密度泛函理论（DFT）计算，以阐明Mo添加对功函数和表面电子结构的本征电子效应。TA18 - 6mo合金表现出最佳的力学性能，抗压屈服强度为1112 MPa，极限抗压强度为1611 MPa，几乎是基体TA18合金的两倍。耐蚀性随Mo含量的增加而稳步提高。在8 wt% Mo时，相对于TA18，腐蚀电流密度降低了~ 70%，钝化膜电阻Rp达到2.375 × 106 Ω cm2，是基体合金的10倍以上。DFT计算表明，Mo的加入提高了功函数，从而抑制了阳极溶解。在5 mol/L HCl中浸泡5天后，TA18 - 8mo合金的质量损失仅为TA18的30%。XPS分析证实在合金表面形成致密的TiO2-MoO3复合钝化膜。研究结果表明，单元素Mo合金化为提高TA18的强度和耐蚀性提供了一种简单有效的策略，同时建立了工作功能与腐蚀行为之间的定量联系，为设计高性能深海钛合金提供了新的理论指导。

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引用次数: 0

Investigating the effect of VED and lattice strut diameter on the shape memory effect of nitinol actuators 研究了变形点阵和点阵支撑直径对镍钛诺作动器形状记忆效应的影响

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-08 DOI: 10.1016/j.jmrt.2025.12.069

Josephine Ryan Murphy , Josiah Cherian Chekotu , Paul Healy , Dermot Brabazon

This study examines the combined effect of volumetric energy density (VED) and lattice strut diameter on the microstructure, mechanical properties, and shape memory performance of NiTi lattice structures fabricated by laser powder bed fusion (PBF-LB). Produced sample characterisation included measurement of printed part density, composition, thermal transitions, and the compressive stress-strain response. The true strain (

ε_{t}

), elastic strain (

ε_{e}

), residual strain (

ε_{r}

), SME recovered strain (

ε_{S M E}

), actuation time, and thermal field generated during loading and recovery were also examined. These sample characteristics were evaluated in relation to both the process parameters as well as the printed lattice structure geometry. Lattices with 0.5, 1.0, and 1.5 mm strut diameters were produced by VEDs ranging from 21 J/mm³ to 83 J/mm³. Results reveal a strong process-geometry-property relationship. Optimum VED increased with strut diameter, resulting in relative densities of up to 99.36 %. Larger struts resulted in higher ultimate strengths however resulted in reduced SME recovered strain and slower actuation. Thinner struts provided lower load baring capability however with the benefit of greater SME recovery, larger stroke displacement, and faster actuation. The findings highlight a trade-off between strength and actuator performance and highlight the importance of considering both geometry and process parameters when designing NiTi actuators while targeting application specific properties.

本文研究了体积能量密度（VED）和晶格支撑直径对激光粉末床熔合（PBF-LB）制备的NiTi晶格结构的微观结构、力学性能和形状记忆性能的综合影响。生产的样品特征包括印刷零件密度、成分、热转变和压缩应力-应变响应的测量。考察了真实应变（εt）、弹性应变（εe）、残余应变（εr）、SME恢复应变（εSME）、驱动时间以及加载和恢复过程中产生的热场。这些样品的特性进行了评估，关系到两个工艺参数以及印刷的晶格结构几何。在21 J/mm3至83 J/mm3范围内，VEDs产生了直径为0.5、1.0和1.5 mm的栅格。结果显示了很强的过程-几何-性质关系。优化后的相对密度随支撑直径的增大而增大，相对密度可达99.36%。更大的支撑导致更高的极限强度，但导致更小的SME恢复应变和更慢的驱动。较薄的支撑提供了较低的负载承受能力，但具有更大的SME恢复，更大的冲程位移和更快的驱动速度。研究结果强调了强度和执行器性能之间的权衡，并强调了在设计NiTi执行器时考虑几何和工艺参数的重要性，同时针对特定的应用特性。

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引用次数: 0

Electrochemical and mechanical performance of biodegradable ZX30 alloy using multi-channel spiral twist extrusion (MCSTE) for biomedical implants 多通道螺旋扭挤压（MCSTE）生物降解ZX30合金生物医学植入材料的电化学和力学性能研究

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-06 DOI: 10.1016/j.jmrt.2025.12.021

Khaled B. Abdelfattah , Adel M.A. Mohamed , Mohamed M.Z. Ahmed , Marwa A. Abbas , A.I. Alateyah , Yasser Zedan , Waleed H. El-Garaihy , Hanadi G. Salem

Multi-channel spiral twist extrusion (MCSTE) is an emerging severe plastic deformation (SPD) technique that offers tunable processing parameters and potential for scalable deformation of bulk billets. This study investigates the effects of MCSTE processing parameters, including twist angles of 30° and 40°, processing routes A and C, and up to eight passes on the microstructure, mechanical performance, and electrochemical behavior of ZX30 magnesium alloy for biodegradable implant applications. Microstructural characterization via scanning electron microscopy, EBSD, and energy-dispersive X-ray spectroscopy revealed that combined route A with incremental passes promote finer grain sizes and more randomized textures compared to route C. Route C developed more pronounced texture and relatively courser grains. After eight passes via Route A at 30°, an 82 % reduction in grain size and a 54 % increase in ultimate tensile strength were achieved relative to the as-annealed condition. Corrosion resistance in simulated body fluid also improved significantly, with Route C at 30° showing a 221 % increase in polarization resistance. While microstructural heterogeneity, particularly an edge-to-center gradient, persists even after multiple passes, these results demonstrate that MCSTE can effectively enhance key functional properties of biodegradable ZX30-Mg alloys. The process remains under development, but its parameter flexibility and compatibility with bulk forms make it a possible candidate for further optimization toward biomedical applications.

多通道螺旋扭挤压（MCSTE）是一种新兴的严重塑性变形（SPD）技术，它提供了可调的加工参数和块状坯料可伸缩变形的潜力。本研究研究了30°和40°扭转角度、A和C加工路线以及多达8道MCSTE工艺参数对ZX30镁合金可生物降解植入材料微观结构、力学性能和电化学行为的影响。通过扫描电子显微镜、EBSD和能量色散x射线能谱的微观结构表征表明，与C路线相比，A路线与增量通道相结合，其颗粒尺寸更细，纹理更随机。C路线的纹理更明显，颗粒相对较小。经过A路线30°的8次热处理后，与退火状态相比，晶粒尺寸减小了82%，极限抗拉强度提高了54%。在模拟体液中的耐腐蚀性也得到了显著提高，30°C路线的极化电阻提高了221%。尽管经过多次处理后，微观组织的非均匀性，特别是边缘到中心的梯度仍然存在，但这些结果表明，MCSTE可以有效地提高可生物降解ZX30-Mg合金的关键功能性能。该工艺仍在开发中，但其参数灵活性和与批量形式的兼容性使其成为进一步优化生物医学应用的可能候选者。

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引用次数: 0

Composition design and properties of low melting point (SnBiInZn)100-xGax high entropy alloy for electronic packaging 电子封装用低熔点（SnBiInZn）100-xGax高熵合金的组成设计与性能

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t

Pub Date : 2026-03-01 Epub Date: 2025-12-03 DOI: 10.1016/j.jmrt.2025.12.029

Mo Chen , Liang Zhang , Qi-ming Chen , Chuan-jiang Wu , Yu-hao Chen , Si-yuan Peng , Lei Sun

Low-temperature solders are critical in electronic packaging to reduce thermal damage and improve solder quality. In this paper, (SnBiInZn)_100-xGa_x (x = 0.5, 1, 2, 4, at.%) high-entropy alloys (HEAs) were prepared, and the effects of adding different contents of Ga on the thermal properties, microstructures, and interfacial morphology of the isotropic-ratio SnBiInZn low-melting-point (LMP) HEAs were investigated. Since Ga has a low melting point, its addition significantly reduced the melting temperature of the HEA. Adding 4 at.% Ga lowered the HEA's liquidus temperature to 76.3 °C, enabling soldering at 100 °C, 130 °C, and 160 °C. Higher temperatures improved wettability, with the best results at 160 °C (83.6 mm² spreading area at 1 at.% Ga). The microstructure also refined, changing the Zn phase from rod-like to needle-like. At the interface, a bilayer IMC structure formed: first CuZn₅ near the microstructure, then Cu₅Zn₈ next to the Cu substrate as higher temperatures and longer reaction times boosted Zn diffusion. Ga partially dissolved into the CuZn₅ IMC, slowing Zn diffusion and thinning the Cu₅Zn₈ layer. At 160 °C, the (SnBiInZn)₉₉Ga₁/Cu joint reached peak shear strength, 26.6 MPa, with a ductile fracture mode characterized by a fracture surface exhibiting numerous honeycomb-like dimples.

低温焊料是电子封装中减少热损伤和提高焊料质量的关键。（SnBiInZn）100-xGax (x = 0.5, 1,2,4, at。制备了%)高熵合金（HEAs），研究了添加不同Ga含量对各向同性比SnBiInZn低熔点HEAs的热性能、显微组织和界面形貌的影响。由于Ga具有较低的熔点，它的加入显著降低了HEA的熔化温度。加上4个at。% Ga将HEA的液相温度降低到76.3°C，可以在100°C， 130°C和160°C下进行焊接。较高的温度改善了润湿性，在160°C （83.6 mm2铺展面积）时效果最好。% Ga)。显微组织细化，Zn相由棒状变为针状。在界面处形成双层IMC结构：随着温度的升高和反应时间的延长，Cu5Zn8靠近Cu衬底，CuZn5靠近微观结构。Ga部分溶解在CuZn5 IMC中，减缓了Zn的扩散，使Cu5Zn8层变薄。在160℃时，（SnBiInZn）99Ga1/Cu接头抗剪强度达到峰值26.6 MPa，断口呈蜂窝状韧窝的韧性断裂模式。

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