Transactions of Nonferrous Metals Society of China最新文献

英文中文

Distinctive yield behavior of low-density Co-Ni-Al-V-Ti-Ta superalloy designed by CALPHAD 低密度Co-Ni-Al-V-Ti-Ta高温合金独特的屈服行为

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-01-01 DOI: 10.1016/S1003-6326(25)66960-3

Yu-peng ZHANG , Zhong-feng CHEN , De-bin ZHENG , Cui-ping WANG , Hao-jun ZHUO , Xiang YU , Yue-chao CHEN , Shui-yuan YANG , Yi-lu ZHAO , Xing-jun LIU

Low-density superalloys often exhibit low yield strength in the intermediate temperature range (300-650 °C). To enhance yield performance in this range, the CALPHAD method was used to design a new Co-based superalloy. The Co-30Ni-10Al-3V-6Ti-2Ta alloy, designed based on γ′ phase dissolution temperature and phase fraction, was synthesized via arc melting and heat treatment. Phase transition temperatures, microstructure evolution, and high-temperature mechanical properties were characterized by differential scanning calorimetry, scanning electron microscopy, dual-beam TEM, and compression tests. Results show that the alloy has low density (8.15 g/cm³) and high γ′ dissolution temperature (1234 °C), along with unique yield strength retention from room temperature to 650 °C. The yield strength anomaly (YSA) is attributed to high stacking fault energy and activation of the Kear-Wilsdorf locking mechanism, contributing to superior high-temperature stability of the alloy. The yield strength of this alloy outperforms other low-density Co-based superalloys in the temperature range of 23-650 °C.

低密度高温合金通常在中间温度范围（300-650℃）表现出较低的屈服强度。为了提高该范围内的屈服性能，采用CALPHAD方法设计了一种新型钴基高温合金。根据γ′相溶出温度和相分数设计了Co-30Ni-10Al-3V-6Ti-2Ta合金，通过电弧熔炼和热处理制备了Co-30Ni-10Al-3V-6Ti-2Ta合金。采用差示扫描量热法、扫描电镜、双光束透射电镜和压缩试验对相变温度、显微组织演变和高温力学性能进行了表征。结果表明，该合金具有低密度（8.15 g/cm³）和高γ′溶解温度（1234℃），室温至650℃具有独特的屈服强度保持性能。屈服强度异常（YSA）是由于较高的层错能和激活的Kear-Wilsdorf锁定机制，导致合金具有优异的高温稳定性。在23 ~ 650℃的温度范围内，该合金的屈服强度优于其他低密度co基高温合金。

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引用次数: 0

Low-temperature bonding of W90 tungsten heavy alloy using Sn-2Al filler metal by ultrasonic-assisted coating technology 利用超声辅助涂层技术，用Sn-2Al填充金属对W90钨重合金进行低温粘接

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-01-01 DOI: 10.1016/S1003-6326(25)66962-7

Xiao-guo SONG , Xu-dong ZHANG , Wei FU , Xiao-yu TIAN , Guang-dong WU , Sheng-peng HU

The Sn-2Al filler metal was utilized to bond W90 tungsten heavy alloys by the ultrasonic-assisted coating technology in atmospheric environment at 250 °C. The effects of ultrasonic power and ultrasonic time on microstructure and interfacial strength of Sn-2Al/W90 interface were investigated. The ultrasound improved the wettability of Sn-2Al filler metal on W90 surface. As the ultrasonic power increased and ultrasonic time increased, the size of Al phase in seam decreased. The maximum value of Sn-2Al/W90 interfacial strength reached 30.1 MPa. Based on the acoustic pressure simulation and bubble dynamics, the intensity of cavitation effect was proportional to ultrasonic power. The generated high temperature and high pressure by cavitation effect reached 83799.6 K and 1.26×10¹⁴ Pa, respectively.

采用超声辅助包覆技术，在250℃的大气环境下，利用Sn-2Al填充金属包覆W90钨重合金。研究了超声功率和超声时间对Sn-2Al/W90界面微观结构和界面强度的影响。超声增强了Sn-2Al钎料在W90表面的润湿性。随着超声功率的增大和超声时间的延长，焊缝中Al相的尺寸减小。Sn-2Al/W90界面强度最大值为30.1 MPa。通过声压仿真和气泡动力学分析，发现空化效应的强度与超声功率成正比。空化效应产生的高温和高压分别达到83799.6 K和1.26×1014 Pa。

引用次数: 0

Effect of hydrogen sulfide on reductive leaching of chalcopyrite by copper 硫化氢对铜还原浸出黄铜矿的影响

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-01-01 DOI: 10.1016/S1003-6326(25)66964-0

Xin SUN , Rui LIAO , Zu-chao PAN , Yi-sheng ZHANG , Mao-xin HONG , Yan-sheng ZHANG , Jun WANG , Guan-zhou QIU

A series of leaching and electrochemical experiments were conducted to elucidate the critical role of hydrogen sulfide (H₂S) in copper-driven reduction of chalcopyrite. Results demonstrate that in the absence of H₂S, metallic copper converts chalcopyrite into bornite (Cu₅FeS₄). However, the introduction of H₂S promotes the formation of chalcocite (Cu₂S) by altering the oxidation pathway of copper. Electrochemical analysis demonstrates that the presence of H₂S significantly reduces the corrosion potential of copper from 0.251 to -0.223 V (vs SHE), reaching the threshold necessary for the formation of Cu₂S. Nevertheless, excessive H₂S triggers sulfate reduction via the reaction of 8Cu+H₂SO₄+3H₂S=4Cu₂S+4H₂O (ΔG=-519.429 kJ/mol at 50 °C), leading to inefficient copper utilization.

通过一系列的浸出和电化学实验，阐明了硫化氢（H2S）在铜驱动还原黄铜矿中的关键作用。结果表明，在没有H2S的情况下，金属铜将黄铜矿转化为斑铜矿（Cu5FeS4）。然而，H2S的引入通过改变铜的氧化途径促进了辉铜矿（Cu2S）的形成。电化学分析表明，H2S的存在显著降低了铜的腐蚀电位，从0.251 V （vs SHE）降至-0.223 V (vs SHE)，达到了形成Cu2S所需的阈值。然而，过量的H2S通过8Cu+H2SO4+3H2S=4Cu2S+4H2O的反应（ΔG=-519.429 kJ/mol, 50℃）引发硫酸盐还原，导致铜利用率低下。

引用次数: 0

Influence of interface shape on microstructure and mechanical properties of Mg/Al composite plates fabricated by hot-pressing 界面形状对热压Mg/Al复合材料微观组织和力学性能的影响

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-01-01 DOI: 10.1016/S1003-6326(25)66953-6

Shi-jun TAN , Bo SONG , Hao-hua XU , Ting-ting LIU , Jia SHE , Sheng-feng GUO , Xian-hua CHEN , Kai-hong ZHENG , Fu-sheng PAN

A new method was proposed for preparing AZ31/1060 composite plates with a corrugated interface, which involved cold-pressing a corrugated surface on the Al plate and then hot-pressing the assembled Mg/Al plate. The results show that cold-pressing produces intense plastic deformation near the corrugated surface of the Al plate, which promotes dynamic recrystallization of the Al substrate near the interface during the subsequent hot-pressing. In addition, the initial corrugation on the surface of the Al plate also changes the local stress state near the interface during hot pressing, which has a large effect on the texture components of the substrates near the corrugated interface. The construction of the corrugated interface can greatly enhance the shear strength by 2-4 times due to the increased contact area and the strong “mechanical gearing” effect. Moreover, the mechanical properties are largely depended on the orientation relationship between corrugated direction and loading direction.

提出了一种制备具有波纹界面的AZ31/1060复合材料板的新方法，即在Al板上冷压波纹表面，然后热压组装好的Mg/Al板。结果表明：冷压在Al板波纹表面附近产生强烈的塑性变形，促使界面附近Al基板在后续热压过程中发生动态再结晶；此外，Al板表面的初始波纹也改变了热压过程中界面附近的局部应力状态，对波纹界面附近基材的纹理成分有较大影响。波纹界面的施工由于增加了接触面积和较强的“机械传动”效应，可使抗剪强度大大提高2-4倍。此外，波纹方向与加载方向之间的取向关系在很大程度上决定了其力学性能。

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引用次数: 0

Unanticipated strengthening of Cu-19Ni-6Cr-7Mn alloy achieved by synergistic effect of spinodal decomposition and multiscale precipitation Cu-19Ni-6Cr-7Mn合金在多尺度分解和多尺度沉淀的协同作用下实现了非预期强化

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-01-01 DOI: 10.1016/S1003-6326(25)66957-3

Shao-lin LI , Ying-ying ZHU , Xiu-hua GUO , Qiang-song WANG , Wen-ming SUN , Ke-xing SONG

The microstructural evolution of Cu-19Ni-6Cr-7Mn alloy during aging treatment was investigated. After aging for 120 min at 500 °C, the alloy exhibited excellent mechanical properties, including a tensile strength of 978 MPa and an elastic modulus of 145.8 GPa. After aging for 240 min at 500 °C, the elastic modulus of the alloy reached 149.5 GPa, which was among the highest values reported for Cu alloys. It was worth mentioning that the tensile strength increased rapidly from 740 to 934 MPa after aging for 5 min at 500 °C, which was close to the maximum tensile strength (978 MPa). Analysis of the underlying strengthening mechanisms and phase transformation behavior revealed that the Cu-19Ni-6Cr-7Mn alloy underwent spinodal decomposition and DO₂₂ ordering during the first 5 min of aging at 500 °C, and L1₂ ordered phases and bcc-Cr precipitates appeared. Therefore, the enhanced mechanical properties of the Cu-19Ni-6Cr-7Mn alloy can be attributed to the stress field generated by spinodal decomposition and the presence of nanoscale ordered phase and Cr precipitates.

研究了Cu-19Ni-6Cr-7Mn合金在时效处理过程中的组织演变。在500℃下时效120 min后，合金具有优异的力学性能，抗拉强度为978 MPa，弹性模量为145.8 GPa。在500℃下时效240 min后，合金弹性模量达到149.5 GPa，是Cu合金中弹性模量最高的合金之一。值得一提的是，在500℃下时效5min后，抗拉强度从740迅速提高到934 MPa，接近最大抗拉强度978 MPa。对Cu-19Ni-6Cr-7Mn合金强化机制和相变行为的分析表明，在500℃时效前5min， Cu-19Ni-6Cr-7Mn合金发生了独立分解和DO22有序相，出现了L12有序相和bcc-Cr相。因此，Cu-19Ni-6Cr-7Mn合金力学性能的增强可归因于由旋多分解产生的应力场以及纳米级有序相和Cr析出相的存在。

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引用次数: 0

Differences in competitive reactions between hydrogarnet and quicklime during Bayer digestion process 拜耳消化过程中氢石榴石与生石灰竞争反应的差异

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-01-01 DOI: 10.1016/S1003-6326(25)66965-2

Tai-yang JI, Yi-lin WANG, Tian-gui QI, Qiu-sheng ZHOU, Zhi-hong PENG, Gui-hua LIU, Xiao-bin LI

The differences in the competitive reactions of hydrogarnet and quicklime when reacting with titanium- containing and silicon-containing minerals during the Bayer digestion process were investigated. Thermodynamic analysis, artificial mineral experiments, and an evaluation of the digestion effect of natural diasporic bauxite were conducted. The results indicate that hydrogarnet shows a preferential reaction with anatase, and this preference becomes more pronounced as the silicon saturation coefficient increases. In contrast, quicklime participates in non-selective reactions with both anatase and desilication products (DSP). The preference of hydrogarnet for anatase significantly enhances the utilization efficiency of CaO in the high-temperature Bayer digestion process.

研究了水榴石和生石灰在拜耳消化过程中与含钛和含硅矿物反应时竞争反应的差异。对天然铝土矿进行了热力学分析、人工选矿实验和溶出效果评价。结果表明，水榴石与锐钛矿表现出优先反应，且随着硅饱和系数的增大，这种优先反应更加明显。相反，生石灰参与与锐钛矿和脱硅产物（DSP）的非选择性反应。水榴石对锐钛矿的偏爱显著提高了高温拜耳消解过程中CaO的利用效率。

引用次数: 0

Precipitation behavior of S’ phase in rapid cold punched Al-Cu-Mg alloy 快速冷冲孔Al-Cu-Mg合金中S′相的析出行为

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-01-01 DOI: 10.1016/S1003-6326(25)66949-4

Ze-yi HU , Pu-yu LI , Cai-he FAN , Shuai WU , Yi-ling LU , Yin-chun XIAO , Ling OU

The evolution of the S’ precipitate in Al-Cu-Mg alloy was investigated using transmission electron microscopy (TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), molecular dynamics (MD) simulations, and other analytical techniques. The precipitation behavior during different aging stages of the supersaturated solid solution formed after rapid cold punching was focused, which induces rapid dissolution of precipitates. The findings reveal that the precipitation sequence is significantly influenced by aging temperature. At higher aging temperatures, which mitigate lattice distortion in the matrix, the precipitation sequence follows the conventional path. Conversely, at lower aging temperatures, where lattice distortion persists, the sequence deviates, suppressing the formation of Guinier-Preston-Bagaryatsky (GPB) zones. MD simulations confirm that the variations in solute atom diffusion rates at different aging temperatures lead to the differences in the S’ phase precipitation sequence.

采用透射电子显微镜（TEM）、高角环形暗场扫描透射电子显微镜（HAADF-STEM）、分子动力学模拟（MD）等分析技术研究了Al-Cu-Mg合金中S′析出物的演化过程。重点研究了快速冷冲孔后形成的过饱和固溶体在不同时效阶段的析出行为。结果表明，时效温度对析出顺序有显著影响。在较高的时效温度下，基体中的晶格畸变减轻，析出顺序遵循常规路径。相反，在较低的时效温度下，晶格畸变持续存在，序列偏离，抑制了Guinier-Preston-Bagaryatsky （GPB）区的形成。MD模拟证实了不同时效温度下溶质原子扩散速率的变化导致了S相析出顺序的差异。

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引用次数: 0

Effect and mechanism of Ti-O solid solution layer on interfacial bonding strength of cold roll bonded titanium/stainless steel laminated composite plate Ti-O固溶层对冷轧结合钛/不锈钢层合板界面结合强度的影响及机理

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-01-01 DOI: 10.1016/S1003-6326(25)66956-1

Zhi-yan YANG , Xue-feng LIU , Hong-ting CHEN , Xin MA

Titanium plates with a Ti-O solid solution surface-hardened layer were cold roll-bonded with 304 stainless steel plates with high work hardening rates. The evolution and mechanisms affecting the interfacial bonding strength in titanium/stainless steel laminated composites were investigated. Results indicate that the hardened layer reduces the interfacial bonding strength from over 261 MPa to less than 204 MPa. During the cold roll-bonding process, the hardened layer fractures, leading to the formation of multi-scale cracks that are difficult for the stainless steel to fill. This not only hinders the development of an interlocking interface but also leads to the presence of numerous microcracks and hardened blocks along the nearly straight interface, consequently weakening the interfacial bonding strength. In metals with high work hardening rates, the conventional approach of enhancing interface interlocking and improving interfacial bonding strength by using a surface-hardened layer becomes less effective.

采用Ti-O固溶表面硬化层的钛板与加工硬化率高的304不锈钢板进行冷轧粘接。研究了钛/不锈钢层合复合材料界面结合强度的演变及其影响机理。结果表明：硬化层使界面结合强度从261 MPa以上降低到204 MPa以下；冷滚焊过程中硬化层断裂，形成多尺度裂纹，不锈钢难以填充。这不仅阻碍了联锁界面的发展，而且导致沿接近直线的界面存在大量微裂纹和硬化块，从而削弱了界面的结合强度。在高加工硬化率的金属中，通过表面硬化层增强界面联锁和提高界面结合强度的传统方法变得不那么有效。

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引用次数: 0

Weakening aging-induced embrittlement via deformation-assisted regulation of isothermal ω precipitation in metastable Ti-15Mo alloy 变形辅助调节等温ω沉淀对亚稳Ti-15Mo合金时效致脆的影响

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-01-01 DOI: 10.1016/S1003-6326(25)66954-8

Fei ZHANG , Shi-wei PAN , Shun XU , Feng QIAN , Jiang-kun FAN , Qun-bo FAN , Xing-wang CHENG

In order to overcome the embrittlement of metastable titanium alloys caused by the precipitation of ω_iso phase during aging, regulation of isothermal ω precipitation was investigated in Ti-15Mo alloy. The results show that the sample is brittle when direct aging (A) is applied at 350 °C for 1 h after solution treatment (ST). If pre-deformation (D) is performed on the ST sample to induce {332} twins and secondary α′′ phase, subsequent aging at 350 °C (STDA350) improves the strength to 931 MPa with a good ductility of about 20% maintained. However, when aging is performed at 400 °C or 450 °C (STDA400/450), the strength can be further improved, but the ductility is dramatically reduced. Atomic-scale characterizations show that the partial collapse of ω phase in the STDA350 sample effectively eliminates aging-induced embrittlement, but complete collapse leads to poor ductility in the STDA400/450 sample.

为了克服时效过程中ω异相析出引起的亚稳钛合金脆性，研究了Ti-15Mo合金等温ω析出规律。结果表明：固溶处理（ST）后，在350℃下直接时效(A) 1 h，试样呈脆性；如果对ST试样进行预变形(D)以诱导{332}孪晶和次生α”相，则随后的350℃时效（STDA350）将强度提高到931 MPa，并保持了约20%的良好塑性。然而，当在400°C或450°C （STDA400/450）时效时，强度可以进一步提高，但延展性大大降低。原子尺度表征表明，STDA350样品中ω相的部分坍塌有效地消除了时效引起的脆性，但STDA400/450样品中ω相的完全坍塌导致延展性差。

引用次数: 0

Quantitative analysis on T1 phase precipitation behaviors and mechanical properties of 2195 Al-Li alloy after cryogenic deformation and aging 2195 Al-Li合金低温变形时效后T1相析出行为及力学性能定量分析

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China

Pub Date : 2026-01-01 DOI: 10.1016/S1003-6326(25)66947-0

Meng-jia YAO , Hua-bo ZHOU , Rui-qian WANG , Wei LIU

The water-quenched (WQ) 2195 Al-Li alloy was subjected to stretching at different temperatures, from room temperature (RT) to -196 °C (CT), to investigate the effect of cryogenic deformation on the aging precipitation behaviors and mechanical properties. The precipitation kinetics of the T1 phase and the microstructures in peak aging state were investigated through the differential scanning calorimetric (DSC) tests and electron microscopy observation. The results show that -196 °C deformation produces a high dislocation density, which promotes the precipitation of the T1 phase and refines its sizes significantly. In addition, the grain boundary precipitates (GBPs) of -196 °C-stretched samples are suppressed considerably due to the high dislocation density in the grain interiors, which increases the ductility. In comparison, the strength remains nearly constant. Thus, it is indicated that cryogenic forming has the potential to provide the shape and property control for the manufacture of critical components of aluminum alloys.

对水淬（WQ） 2195 Al-Li合金在室温至-196℃的不同温度下进行拉伸，研究低温变形对时效析出行为和力学性能的影响。通过差示扫描量热（DSC）测试和电镜观察，研究了T1相的析出动力学和峰时效态的显微组织。结果表明：-196℃变形产生较高的位错密度，促进了T1相的析出并使其尺寸明显细化；此外，-196℃拉伸试样的晶界析出相（GBPs）被显著抑制，这是由于晶粒内部的高位错密度，从而提高了延展性。相比之下，强度几乎保持不变。因此，低温成形技术有可能为铝合金关键部件的制造提供形状和性能控制。

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