Transactions of Nonferrous Metals Society of China最新文献

英文中文

Mechanisms for synergistically enhanced mechanical properties and corrosion resistance in Mg−Al−Sn alloys 协同增强Mg - Al - Sn合金力学性能和耐蚀性的机理

IF 5.5 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-06-01 Epub Date: 2026-06-26 DOI: 10.1016/S1003-6326(26)67058-6

Da-wei WANG, Rui ZHOU, Ya-jie YANG, Xiao-rui DONG, Hai-long JIA, Pin-kui MA, Jin XU, Quan SHAN, Zu-lai LI, Jin-zhu FU, Min ZHA

A combination of rare earth (RE) alloying and plastic deformation was employed to improve the comprehensive properties of Mg−3Al−1Sn−0.5Ca−0.2Mn (ATXM) alloys. The results show that the rolled ATXM-0.1RE alloys exhibit remarkable simultaneous improvements in both mechanical strength and corrosion resistance. Specifically, the alloys with Sm, Ce, and Y additions demonstrate yield strengths of 238, 232, and 238 MPa, elongations of 18%, 17%, and 23%, and corrosion rates of approximately 3.4, 2.9, and 1.7 mm/a, respectively. Notably, the rolled ATXM-0.1Y alloy displays the optimal overall properties. The underlying mechanisms involve grain refinement (from ~50 μm to below 5 μm) and alterations in composition, dimension, and arrangement of secondary phases, which contribute to fine-grain strengthening and Orowan strengthening, thereby bolstering mechanical properties. Furthermore, these modifications mitigate the galvanic corrosion and strengthen the protective corrosion product film, resulting in a significantly improved corrosion resistance.

采用稀土合金化和塑性变形相结合的方法提高了Mg−3Al−1Sn−0.5Ca−0.2Mn （ATXM）合金的综合性能。结果表明，轧制后的ATXM-0.1RE合金在机械强度和耐蚀性方面均有显著提高。具体来说，添加Sm、Ce和Y的合金的屈服强度分别为238、232和238 MPa，延伸率分别为18%、17%和23%，腐蚀速率分别约为3.4、2.9和1.7 mm/a。值得注意的是，轧制后的ATXM-0.1Y合金显示出最佳的综合性能。晶粒细化（从~50 μm到5 μm以下）、二次相的组成、尺寸和排列发生改变，有利于细晶强化和Orowan强化，从而提高力学性能。此外，这些改性减轻了电偶腐蚀，增强了保护腐蚀产物膜，从而显着提高了耐腐蚀性。

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引用次数: 0

Adjusting mechanisms for ultrafine-grained microstructures during hot deformation of Ni−38Cr−3.8Al alloy via pre-ageing precipitation 预时效沉淀对Ni−38Cr−3.8铝合金热变形超细晶组织的调节机制

IF 5.5 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-06-01 Epub Date: 2026-06-26 DOI: 10.1016/S1003-6326(26)67062-8

Yu-qing ZHANG, Guo-zheng QUAN, Yan-ze YU, Ying-ying LIU, Wei XIONG, Wei-wei DAI, Qian JIANG

Five different samples were fabricated via altering pre-ageing temperature to explore the effects of pre-precipitation states on dynamic recrystallization (DRX) and microstructure evolution during hot compression of Ni−38Cr−3.8Al alloy. Results reveal that α-Cr phases precipitate from the matrix in lamella and particle forms during pre-aging treatment. During subsequent hot deformation, the pre-precipitated α-Cr lamellae experience significant dissolution fragmentation and spheroidization, transforming into finer particles due to the elevated temperature and high-density dislocations. At 560 °C, incomplete discontinuous precipitation (DP) state inhibits DRX, leading to necklace-like microstructures. As temperature exceeds 640 °C, complete DP state promotes DRX, resulting in ultrafine-grained microstructures. Coarse α-Cr particles enhance DRX process through particle-stimulated nucleation (PSN) and discontinuous DRX mechanisms, while dissolved α-Cr lamellae promote DRX via continuous DRX mechanism. The DRX kinetics analysis indicates that increasing pre-ageing temperature accelerates DRX, as demonstrated by reduced critical strain and peak strain, and increased DRX volume fraction.

通过改变预时效温度制备5种不同的试样，探讨预析出状态对Ni−38Cr−3.8铝合金热压缩过程动态再结晶（DRX）和显微组织演变的影响。结果表明：在预时效过程中，α-Cr相以片状和颗粒形式从基体中析出；在随后的热变形过程中，预析出的α-Cr片层经历了明显的溶解破碎和球化，由于温度升高和高密度位错而转变为更细的颗粒。在560℃时，不完全不连续析出（DP）状态抑制DRX，形成项链状组织。当温度超过640℃时，完全DP状态促进DRX，形成超细晶组织。粗粒α-Cr颗粒通过粒子刺激成核（PSN）和不连续DRX机制促进DRX过程，溶解的α-Cr片层通过连续DRX机制促进DRX过程。DRX动力学分析表明，提高预时效温度可以加速DRX的形成，表现为临界应变和峰值应变的降低，DRX体积分数的增加。

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引用次数: 0

High-performance Finemet alloy thin film with amorphous/nanocrystalline structure treated by rapid-thermal process 快速热处理非晶/纳米晶结构的高性能精细合金薄膜

IF 5.5 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-06-01 Epub Date: 2026-06-26 DOI: 10.1016/S1003-6326(26)67064-1

Jun-jie LIU, Zhao-guo QIU, Yi-ming ZENG, Zhi-gang ZHENG, Gang WANG, Zhi-peng HOU, Hao-liang LIU, De-chang ZENG, Ping LIU

The influence of thickness and annealing treatment on microstructure and soft magnetic properties of Fe−Si−B−Cu−Nb alloy (Finemet) thin films prepared by magnetron sputtering was systematically studied. As the thickness of the film increases, the coercivity decreases while the saturation magnetization increases, and then both reach a stable state. Following annealing at 773 and 873 K, nanocrystalline α-Fe precipitates within the thin film. The exchange coupling effect between nanocrystals and the amorphous matrix significantly enhances the soft magnetic properties of the thin film. Rapid-thermal process controls the heating rate to minimize grain size and optimize nanocrystal distribution, achieving lower coercivity and higher saturation magnetization without necessitating extra transition metals. Consequently, the Fe−Si−B−Nb−Cu thin film subjected to rapid-thermal process at 873 K for 30 min with a heating rate of 25 K/s exhibits low coercivity of 0.8 A/m and high saturation magnetization of 1.45 T.

系统地研究了厚度和退火处理对磁控溅射制备Fe - Si - B - Cu - Nb合金（Finemet）薄膜显微组织和软磁性能的影响。随着薄膜厚度的增加，矫顽力减小，饱和磁化强度增大，两者趋于稳定。在773和873 K退火后，纳米晶α-Fe在薄膜内析出。纳米晶体与非晶基质之间的交换耦合效应显著提高了薄膜的软磁性能。快速加热过程控制加热速度，使晶粒尺寸最小化，优化纳米晶分布，在不需要额外过渡金属的情况下实现更低的矫顽力和更高的饱和磁化。结果表明，Fe - Si - B - Nb - Cu薄膜在873 K条件下加热30 min，加热速率为25 K/s，其矫顽力低，为0.8 a /m，饱和磁化强度高，为1.45 T。

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引用次数: 0

Assessment of zinc migration behavior and toxicity characteristics in redox smelting of zinc leaching residue 锌浸渣氧化还原冶炼过程中锌迁移行为及毒性特征评价

IF 5.5 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-06-01 Epub Date: 2026-06-26 DOI: 10.1016/S1003-6326(26)67069-0

Heng WANG, Cheng TAN, Yong YU, Rui-jin FAN, Jian-hang HU, Hua WANG

The effects of key redox smelting parameters, including anthracite addition amount, temperature, and holding time, on Zn migration behavior and toxicity characteristics were investigated. The results showed that CaSO₄ in leaching residue promoted the transformation of ZnFe₂O₄ into ZnS−FeS eutectic, hindering Zn recovery and contributing to contamination potential. At temperatures above 1573 K, the ZnS−FeS eutectic in the upper slag was oxidized by O₂/(O)_slag to form ZnO(s), then converted to chemically dissolved Zn, and finally reduced to Zn(g) by CO. Zn volatilization can be improved by pre-desulfurization or by increasing the oxygen potential. Under optimized conditions, the Zn residual content decreased to 0.22 wt.%, substantially lower than the industrial range of 1.0−3.0 wt.%, thereby reducing environmental hazards.

研究了氧化还原冶炼关键参数（无烟煤添加量、温度和保温时间）对Zn迁移行为和毒性特性的影响。结果表明：浸出渣中的CaSO4促进了ZnFe2O4向ZnS−FeS共晶的转变，阻碍了Zn的回收，增加了污染的可能性；在1573 K以上的温度下，上渣中的ZnS−FeS共晶被O2/(O)渣氧化生成ZnO(s)，然后转化为化学溶解Zn，最后被CO还原为Zn(g)。预脱硫或提高氧势可以改善Zn的挥发。在优化条件下，锌残留量降至0.22 wt.%，大大低于1.0 ~ 3.0 wt.%的工业范围，从而降低了环境危害。

引用次数: 0

Low-ammonium synergistic leaching of ionic rare earth ore with acetic acid−ammonium sulfate system 离子稀土矿醋酸-硫酸铵体系低铵协同浸出研究

IF 5.5 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-06-01 Epub Date: 2026-06-26 DOI: 10.1016/S1003-6326(26)67067-7

Shan HU, Lian-jun WU, Jun WANG, Yang LIU, Bing-xuan HE, Guan-zhou QIU

To mitigate ammonium pollution and soil acidification associated with traditional (NH₄)₂SO₄ leaching of ionic rare earth ores, a synergistic approach utilizing low-concentration (NH₄)₂SO₄ and acetic acid (HAc) was proposed to enhance ion exchange efficiency while minimizing ammonium consumption. Leaching efficiency and ammonium consumption were evaluated through comparative leaching experiments. Under optimized co-leaching conditions (pH 4−5, 30 °C, and 1 h), rare earth elements (REEs) leaching efficiency of 88.92% was achieved. This represents a 13.36% increase over single (NH₄)₂SO₄ leaching (0.02 mol/L). Compared to the conventional single (NH₄)₂SO₄ system (requiring 0.03 mol/L for 90% efficiency), ammonium consumption was reduced by 33.3%. Characterization revealed enhanced surface roughness and significantly increased negative charge on the ore in the synergistic system, facilitating RE³⁺ exchange. This study provides a sustainable leaching approach, reducing the environmental impact of traditional REE extraction through the rational use of inorganic lixiviants.

为了缓解离子稀土矿传统（NH4）2SO4浸出过程中铵污染和土壤酸化问题，提出了一种利用低浓度（NH4）2SO4和乙酸（HAc）协同浸出的方法，以提高离子交换效率，同时减少铵的消耗。通过对比浸出试验，评价了浸出效率和铵耗。在优化的共浸条件（pH 4 ~ 5、30℃、1 h）下，稀土元素的浸出率可达88.92%。这比单次（NH4）2SO4浸出（0.02 mol/L）增加了13.36%。与传统的单一（NH4）2SO4系统相比（效率为90%时需用0.03 mol/L），铵耗降低33.3%。表征表明，在协同体系中，矿石表面粗糙度增强，负电荷显著增加，有利于RE3+交换。该研究提供了一种可持续的浸出方法，通过合理使用无机浸出剂来减少传统稀土提取对环境的影响。

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引用次数: 0

Constructing porosity database for Al−Si alloy castings through 3D cellular automata model and machine learning 利用三维元胞自动机模型和机器学习技术构建铝硅合金铸件孔隙率数据库

IF 5.5 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-06-01 Epub Date: 2026-06-26 DOI: 10.1016/S1003-6326(26)67056-2

Qing-huai HOU, Xue-long WU, De-cai KONG, Hai-bo QIAO, Xiao-ying MA, Xiang CI, Wen-bo WANG, Yu-ling LANG, Shi-wen XU, Zhong-yao LI, Yi-sheng MIAO, Xing-xing LI, Jun-sheng WANG

A coupled three-dimensional cellular automata (CA) model has been used to predict the hydrogen porosity in an Al−Si alloy as a function of thermal boundary conditions. By quantifying the porosity distribution from simulations, a porosity defect database was established, representing a cooling rate ranging from 0.25 to 50 °C/s at an initial hydrogen content of 3.0×10⁻³ mL/g. Based on the database, four machine learning algorithms including support vector machine (SVM), random forest (RF), K-nearest neighbors (KNN), and gradient boosting machine (GBM) were trained and compared for each porosity characteristic to identify the optimal model. For the prediction of porosity percentage, the determination coefficient (R²) and the root mean square error (RMSE) on the test set reached 0.95 and 0.042, respectively. The predicted porosity distribution agreed well with experiments, indicating that the model can be used to map the porosity size in large casting components.

采用三维元胞自动机（CA）模型预测了Al - Si合金中氢孔隙率随热边界条件的变化。通过定量模拟孔隙度分布，建立了孔隙度缺陷数据库，表示在初始氢含量为3.0×10−3 mL/g时，冷却速度为0.25 ~ 50°C/s。在此基础上，对支持向量机（SVM）、随机森林（RF）、k近邻（KNN）和梯度增强机（GBM）四种机器学习算法进行训练，并对每种孔隙度特征进行比较，以确定最优模型。对于孔隙率的预测，测试集的决定系数（R2）和均方根误差（RMSE）分别达到0.95和0.042。预测的孔隙率分布与实验结果吻合较好，表明该模型可用于绘制大型铸件的孔隙率分布。

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引用次数: 0

Efficient separation of heavy metals from gypsum residue and secondary zinc oxide fume based on synergistic sulfidation 基于协同硫化的石膏渣和二次氧化锌烟尘中重金属的高效分离

IF 5.5 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-06-01 Epub Date: 2026-06-26 DOI: 10.1016/S1003-6326(26)67068-9

Yong-wei WANG, Rui HUANG, Wen-qing QIN, Jun-wei HAN

Synergistic sulfidation roasting of heavy metal gypsum residue and secondary zinc oxide fume was proposed by using the research idea of “waste to treat waste”. Thermodynamic studies indicated that the sulfidation of zinc oxide could be effectively enhanced by increasing the dosage of calcium sulfate and carbon powder in the range of 500−800 °C. The synergistic sulfidation experiments of heavy metal gypsum residue with secondary zinc oxide showed that the sulfidation rate of zinc reached 90.39% and the grain size of ZnS increased from 5 to 10 μm under the conditions of temperature 700 °C, carbon powder 30%, Na₂CO₃ 10%, mass ratio of gypsum residue to secondary zinc oxide 1.4:1, roasting time 2 h and cooling rate 1 °C/min. Meanwhile, 76.32% F, 72.11% Cl and 93.41% As were removed. TG/DTG−DSC, 3D FTIR spectra and SEM analysis showed that the conversion of CaSO₄ to CaCO₃ and the avoidance of CO₂ and SO₂ production were achieved under optimized conditions. This study achieves efficient sulfidation of zinc as well as growth of ZnS grains, laying the theoretical and technological foundation for subsequent recovery of ZnS by flotation.

采用“以废治废”的研究思路，提出了重金属石膏渣与二次氧化锌烟气协同硫化焙烧。热力学研究表明，在500 ~ 800℃范围内，增加硫酸钙和碳粉的用量可以有效地促进氧化锌的硫化。在温度700℃、碳粉30%、Na2CO3 10%、石膏渣与二次氧化锌质量比1.4:1、焙烧时间2 h、冷却速度1℃/min的条件下，重金属石膏渣与二次氧化锌协同硫化实验表明，锌的硫化率达到90.39%，ZnS晶粒尺寸从5 μm增大到10 μm。F、Cl、As的去除率分别为76.32%、72.11%和93.41%。TG/DTG−DSC， 3D FTIR和SEM分析表明，在优化条件下，CaSO4转化为CaCO3，避免了CO2和SO2的产生。本研究实现了锌的高效硫化和ZnS晶粒的生长，为后续浮选回收ZnS奠定了理论和技术基础。

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引用次数: 0

CFD modeling of gas−liquid mixing and splashing in industrial-scale bottom-blowing furnace: Effects of melt viscosity 工业规模底吹炉中气液混合和飞溅的CFD建模：熔体粘度的影响

IF 5.5 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-06-01 Epub Date: 2026-06-26 DOI: 10.1016/S1003-6326(26)67070-7

Cheng-lin LI, You YAN, Ao HAO, Wei-wen HU, Zi-lin YANG, Dong-ling WU, Liu LIU, Hong-jie YAN

The effects of high-lead slag viscosity on gas−liquid mixing efficiency, splashing behavior, and furnace lining erosion were investigated in an oxygen bottom-blowing lead smelting process incorporating lead-containing waste materials. A multi-fluid volume of fluid (VOF) model, integrating experimentally determined slag viscosity values, was used to examine these interactions. The results indicated that optimal gas−liquid mixing occurred at viscosity values of 0.01 and 0.5 Pa·s, while minimal splashing was observed within the viscosity range of 0.1−0.25 Pa·s, corresponding to temperatures of approximately 1076−1100 °C. The regions surrounding the oxygen lances were most susceptible to erosion. Shear stress increased with an increase in melt viscosity, particularly rapidly in the viscosity range of 0.1−0.25 Pa·s. It was recommended that the melt viscosity should be maintained within 0.01−0.1 Pa·s to minimize erosion.

研究了含铅废渣氧底吹炼铅工艺中高铅渣粘度对气液混合效率、飞溅行为和炉衬侵蚀的影响。采用多流体体积（VOF）模型，结合实验确定的炉渣粘度值，对这些相互作用进行了研究。结果表明，在粘度为0.01和0.5 Pa·s时，气液混合效果最佳，而在温度约为1076 ~ 1100℃的0.1 ~ 0.25 Pa·s范围内，飞溅最小。氧枪周围的区域最容易受到侵蚀。剪切应力随熔体粘度的增加而增加，在0.1 ~ 0.25 Pa·s的粘度范围内，剪切应力的增加尤为迅速。建议熔体粘度保持在0.01 ~ 0.1 Pa·s，以减少腐蚀。

引用次数: 0

Effect of Ca content on mechanical properties and ignition resistance of Mg−Zn−Zr−Ca alloys Ca含量对Mg - Zn - Zr - Ca合金力学性能和耐火性的影响

IF 5.5 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-06-01 Epub Date: 2026-06-26 DOI: 10.1016/S1003-6326(26)67057-4

Shi-cheng LI, Ke WANG, Xiao-dong GUO, Hong-yun LI, Jin-xing WANG, Jing-feng WANG, Fu-sheng PAN

Mg−6Zn−0.6Zr alloys with varying Ca contents (0, 0.6, 1.2, 1.8 wt.%) were prepared by gravity casting and hot extrusion. The effect of Ca content on the microstructure, mechanical properties, and ignition resistance of Mg−6Zn−0.6Zr alloy was investigated. The results show that Ca addition promotes Ca₂Mg₆Zn₃ phase formation while inhibiting MgZn₂ precipitation in as-cast alloys. After homogenization, the MgZn₂ phases are nearly dissolved, while numerous Ca₂Mg₆Zn₃ phases remain. During extrusion, the Ca₂Mg₆Zn₃ phases fragment, and MgZn₂ nanoparticles precipitate in the matrix. The combination of fine grains and high-density precipitates significantly enhances the strength of the Ca-containing alloys. The Mg−6Zn−0.6Zr−1.2Ca alloy exhibits the best overall mechanical properties, with ultimate tensile strength of 380.1 MPa, yield strength of 360.1 MPa, and elongation of 10.4%. Additionally, the ignition point increases from 556 to 824 °C with rising Ca content due to the formation of a dense CaO−MgO oxide layer.

采用重力铸造和热挤压法制备了Ca含量分别为0、0.6、1.2、1.8 wt.%的Mg - 6Zn - 0.6 zr合金。研究了Ca含量对Mg−6Zn−0.6Zr合金组织、力学性能和耐火性的影响。结果表明：Ca的加入促进了铸态合金中Ca2Mg6Zn3相的形成，抑制了MgZn2的析出；均匀化后，MgZn2相基本溶解，Ca2Mg6Zn3相保留。挤压过程中，Ca2Mg6Zn3相破碎，MgZn2纳米颗粒在基体中析出。细晶和高密度析出相的结合显著提高了含钙合金的强度。Mg−6Zn−0.6Zr−1.2Ca合金的综合力学性能最佳，抗拉强度为380.1 MPa，屈服强度为360.1 MPa，伸长率为10.4%。此外，随着Ca含量的增加，由于形成致密的CaO - MgO氧化层，着火点从556°C增加到824°C。

{"title":"Effect of Ca content on mechanical properties and ignition resistance of Mg−Zn−Zr−Ca alloys","authors":"Shi-cheng LI, Ke WANG, Xiao-dong GUO, Hong-yun LI, Jin-xing WANG, Jing-feng WANG, Fu-sheng PAN","doi":"10.1016/S1003-6326(26)67057-4","DOIUrl":"10.1016/S1003-6326(26)67057-4","url":null,"abstract":"<div><div>Mg−6Zn−0.6Zr alloys with varying Ca contents (0, 0.6, 1.2, 1.8 wt.%) were prepared by gravity casting and hot extrusion. The effect of Ca content on the microstructure, mechanical properties, and ignition resistance of Mg−6Zn−0.6Zr alloy was investigated. The results show that Ca addition promotes Ca<sub>2</sub>Mg<sub>6</sub>Zn<sub>3</sub> phase formation while inhibiting MgZn<sub>2</sub> precipitation in as-cast alloys. After homogenization, the MgZn<sub>2</sub> phases are nearly dissolved, while numerous Ca<sub>2</sub>Mg<sub>6</sub>Zn<sub>3</sub> phases remain. During extrusion, the Ca<sub>2</sub>Mg<sub>6</sub>Zn<sub>3</sub> phases fragment, and MgZn<sub>2</sub> nanoparticles precipitate in the matrix. The combination of fine grains and high-density precipitates significantly enhances the strength of the Ca-containing alloys. The Mg−6Zn−0.6Zr−1.2Ca alloy exhibits the best overall mechanical properties, with ultimate tensile strength of 380.1 MPa, yield strength of 360.1 MPa, and elongation of 10.4%. Additionally, the ignition point increases from 556 to 824 °C with rising Ca content due to the formation of a dense CaO−MgO oxide layer.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"36 6","pages":"Pages 1729-1748"},"PeriodicalIF":5.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148529689","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

Microstructure evolution and mechanical properties of bulk nanocrystalline Zn−Cu−Sr−Li alloy processed by high-speed rolling 高速轧制体纳米晶Zn−Cu−Sr−Li合金的组织演变与力学性能

IF 5.5 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-06-01 Epub Date: 2026-06-26 DOI: 10.1016/S1003-6326(26)67061-6

Ze-xu YANG, Si-cong ZHAO, Lei WANG, Yi-cheng FENG, Er-jun GUO

Nanocrystalline Zn−3Cu−0.2Sr−xLi (x=0, 0.2, 0.4, wt.%) alloys were prepared via high-speed rolling to meet the urgent demand for high-performance alloys in the biomedical field. The high-speed rolling process generated numerous dislocations, providing sufficient driving force for recrystallization. The addition of Li promoted the formation of ε and β phases. These secondary phases provided abundant heterogeneous nucleation sites and a strong pinning effect, facilitating recrystallized grain nucleation while inhibiting its growth. The grain size of the alloy containing 0.4 wt.% Li was refined from 181.8 μm to 50 nm after rolling. The ultimate tensile strength, yield strength, and elongation of the rolled alloy containing 0.4 wt.% Li achieved 433.3 MPa, 389.2 MPa, and 15.2%, respectively. Compared to the as-cast Li-free alloy, 0.4Li alloy demonstrated a 173% increase in yield strength and a 591% improvement in elongation. Nanocrystalline strengthening was the dominant mechanism, contributing 70.4% to the total yield strength of the rolled Zn−3Cu−0.2Sr−0.4Li alloy.

采用高速轧制法制备了Zn - 3Cu - 0.2 sr - xLi （x= 0,0.2, 0.4, wt.%）纳米晶合金，以满足生物医学领域对高性能合金的迫切需求。高速轧制过程产生了大量位错，为再结晶提供了充分的动力。Li的加入促进了ε相和β相的形成。这些次生相提供了丰富的非均相形核位点和较强的钉住作用，有利于再结晶晶粒的形核，同时抑制晶粒的长大。含锂量为0.4 wt.%的合金轧制后晶粒尺寸由181.8 μm细化到50 nm。含锂量为0.4 wt.%的轧制合金的抗拉强度、屈服强度和伸长率分别达到433.3 MPa、389.2 MPa和15.2%。与铸态无锂合金相比，0.4Li合金的屈服强度提高了173%，伸长率提高了591%。纳米晶强化是主要的强化机制，对轧制Zn−3Cu−0.2Sr−0.4Li合金总屈服强度的贡献为70.4%。

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