Materials Characterization最新文献_第8页

Sequence-dependent HIP–HT effects on microstructure evolution and performance of laser powder bed fusion Ti64 alloy 激光粉末床熔合Ti64合金显微组织演变及性能影响

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization

Pub Date : 2026-01-26 DOI: 10.1016/j.matchar.2026.116074

Jie Su , Minglie Hu , Jiajun Shao , Zhiyao Liu , Shijun Meng , Jinglong Tang , Zhen Luo

Laser powder bed fusion (LPBF) manufacturing of Ti64 alloy has long been confronted with the challenges of inferior ductility in formed components and the intractability of eliminating internal defects during the printing process. Current research predominantly addresses these issues through meticulous process parameter optimization, microstructure modulation via alloy composition adjustment, or the application of conventional heat treatment (HT). In this work, a novel combined hot isostatic pressing (HIP) and HT strategy was devised to simultaneously enhance strength and formability of LPBF-fabricated Ti64, and its overall effects were systematically evaluated. Three processing routes—as-received, HIP+HT, and HT + HIP—were compared. Both HIP+HT and HT + HIP treatments reduced internal porosity from 2.54% in the as-received state by approximately 8- and 51-fold, respectively, and decreased the surface roughness variation from 16.7% to 6.3% and 1.6%. Remarkably, ductility was enhanced under both schemes, with the HIP+HT condition achieving an elongation of 16.62%, far exceeding values reported for conventional additive manufacturing and powder-metallurgy Ti64. A quantitative decomposition of multiple strengthening mechanisms revealed how each post-processing sequence tailors phase distribution, grain size, and defect structure to optimize alloy performance. This work establishes a robust framework and theoretical basis for precise compositional control and high-performance manufacturing of Ti64 alloys.

激光粉末床熔炼（LPBF）制造Ti64合金一直面临着成形件延展性差和打印过程中难以消除内部缺陷的挑战。目前的研究主要是通过细致的工艺参数优化、通过调整合金成分来调节微观结构或应用常规热处理（HT）来解决这些问题。本文设计了一种新型的热等静压（HIP）和高温联合策略，以同时提高lpbf制备Ti64的强度和成形性，并对其总体效果进行了系统评估。比较了三种处理途径——接收、HIP+HT和HT + HIP。HIP+HT和HT + HIP处理分别将内部孔隙率从接收状态的2.54%降低了约8倍和51倍，将表面粗糙度变化从16.7%降低到6.3%和1.6%。值得注意的是，两种方案下的延展性都得到了提高，HIP+HT条件下的伸长率达到了16.62%，远远超过了传统增材制造和粉末冶金Ti64的数值。多种强化机制的定量分解揭示了每个后处理顺序如何调整相分布、晶粒尺寸和缺陷结构以优化合金性能。该工作为Ti64合金的精确成分控制和高性能制造奠定了坚实的框架和理论基础。

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引用次数: 0

Toughness–strength synergy and retained austenite stability in Ni-alloyed carbide-free bainitic/martensitic rail steels 镍合金无碳化物贝氏体/马氏体钢轨钢的韧性-强度协同作用和保留奥氏体稳定性

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization

Pub Date : 2026-01-26 DOI: 10.1016/j.matchar.2026.116072

Jun Yuan , Zhixiang Liu , Lei Zhang , Wei Bai , Jie Huang , Rong Chen , Xuefei Huang

Nickel (Ni) alloying plays a crucial role in tailoring the strength–toughness synergy and retained austenite (RA) stability in carbide-free bainitic/martensitic (CFB/M) rail steels. In this study, the effects of varying Ni contents (0.02–0.61 wt%) on phase transformation behavior, microstructural evolution, and mechanical properties were systematically investigated. With increasing Ni addition, the Ac₃, M_s, and M_f temperatures decreased, leading to enhanced supercooling during transformation and promoting the refinement of the bainitic/martensitic microstructure. Optical, SEM, EBSD, and TEM analyses revealed that higher Ni content reduced the fraction of bainitic ferrite and RA while promoting tempered martensite formation and increasing dislocation density. The Ni-enriched steels exhibited higher fractions of high-angle boundaries and more refined lath structures. Consequently, both yield strength and tensile strength increased from 1027.2 MPa and 1344.3 MPa to 1076.5 MPa and 1383.4 MPa, respectively, while maintaining satisfactory ductility. The Charpy-U impact energy increased significantly, particularly at −40 °C (from 32.6 J to 61.0 J), indicating improved low-temperature toughness. Ni slightly reduced the stability of RA during tempering, while tensile pre-deformation tests suggested only a marginal decrease in mechanical stability with increasing Ni content. Overall, moderate Ni addition (≈0.3–0.6 wt%) effectively enhances both strength and toughness of CFB/M rail steels, offering a viable alloy design strategy for developing high-performance rail materials for heavy-haul and extreme service environments.

镍（Ni）合金在无碳化物贝氏体/马氏体（CFB/M）钢轨钢的强度-韧性协同作用和保留奥氏体（RA）稳定性方面起着至关重要的作用。在本研究中，系统地研究了不同Ni含量（0.02-0.61 wt%）对相变行为、显微组织演变和力学性能的影响。随着Ni添加量的增加，Ac3、Ms和Mf温度降低，相变过程中过冷性增强，促进了贝氏体/马氏体组织的细化。光学、SEM、EBSD和TEM分析表明，较高的Ni含量降低了贝氏体铁素体和RA的比例，促进了回火马氏体的形成，增加了位错密度。富镍钢具有较高的高角晶界和更细化的板条组织。因此，屈服强度和抗拉强度分别从1027.2 MPa和1344.3 MPa提高到1076.5 MPa和1383.4 MPa，同时保持良好的延性。Charpy-U冲击能显著增加，特别是在- 40℃时（从32.6 J增加到61.0 J），表明低温韧性得到了提高。在回火过程中，Ni略微降低了RA的稳定性，而拉伸预变形试验表明，随着Ni含量的增加，RA的机械稳定性仅略有下降。总体而言，适量添加Ni（≈0.3-0.6 wt%）有效地提高了CFB/M钢轨钢的强度和韧性，为开发重载和极端服务环境下的高性能钢轨材料提供了可行的合金设计策略。

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引用次数: 0

Characteristics of negative creep and effect of boron on the creep properties of IN617 superalloy 负蠕变特征及硼对IN617高温合金蠕变性能的影响

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization

Pub Date : 2026-01-26 DOI: 10.1016/j.matchar.2026.116073

Du-Hyun Kim , Ehsan Norouzi , Jae-Hyeok Shim , Dong-Ik Kim , Woo-Sang Jung , Gyeung Ho Kim , Seok Su Sohn , Jin-Yoo Suh

This study investigated the effect of the addition of boron on the creep properties and characteristics of the negative creep phenomenon at 1000 °C in applied stress of 18, 32, and 45 MPa. The results showed that boron addition led to a slightly longer creep life under the tested conditions, with the difference between boron-added and boron-free specimens becoming more noticeable at higher applied stresses. During prolonged creep operation under low applied stress (18 MPa), nitrogen diffused into the structure, leading to the formation of a hard and brittle AlN phase, which weakened long-term creep resistance. Also, the creep strain-time curves of both specimens revealed an unusual negative creep phenomenon. Localized chromium enrichment and the associated contraction of the lattice parameter due to short range ordering (SRO) formation was discussed to be the cause of negative creep.

本研究考察了硼的加入对蠕变性能的影响，以及施加应力为18、32和45 MPa时，在1000°C时负蠕变现象的特征。结果表明：在试验条件下，添加硼使蠕变寿命略长，且在较高的外加应力下，添加硼和不添加硼试样的蠕变寿命差异更为明显。在低外加应力（18 MPa）下的长时间蠕变过程中，氮扩散到组织中，形成硬脆的AlN相，削弱了长期抗蠕变能力。两种试样的蠕变应变-时间曲线均表现出不同寻常的负蠕变现象。讨论了局部铬的富集和由短程有序（SRO）形成引起的晶格参数的收缩是负蠕变的原因。

引用次数: 0

Mechanism and modeling of high-temperature spheroidization of Nb filaments in CuNb nanostructured composite wires CuNb纳米复合线材中铌丝高温球化机理及模拟

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization

Pub Date : 2026-01-26 DOI: 10.1016/j.matchar.2026.116078

Wen Zhang , Hongli Hou , Le Hu , Yifan Wu , Pengfei Wang , Jixing Liu , Shengnan Zhang , Qing Yang

Nanostructured metallic materials exhibit unique interface strengthening effects. However, their metastable structures are susceptible to thermal activation, which compromises high-temperature thermal stability and severely restricts service performance. In this study, copper–niobium nanostructured composite wires (CuNb NCWs) fabricated by jelly–roll and accumulative drawing and bonding process were employed as research subject, We specifically researched two samples, a filament size of 100 nm sample (true strain (η) = 14.0, annealed in one step) and a the filament size of 30 nm sample (η = 16.8, annealed in two steps), both at 700 °C for 3 h per step. Semi-in-situ quenching and in-situ heating in transmission electron microscopy (TEM) were conducted on CuNb NCWs with filament sizes of 100 nm and 30 nm. The thermal stability of CuNb NCWs at elevated temperatures was examined. The recrystallization and spheroidization behaviors of Cu matrix and Nb filaments were characterized. The onset temperature for spheroidization was found to be 700 °C for filament size of 100 nm and 600 °C for filament size of 30 nm. The effects of heating temperature on their structural evolution were analyzed. Based on in-situ TEM heating, the kinetic mechanisms underlying the high-temperature structural evolution of CuNb NCWs were revealed, and the effects of microstructural parameters on spheroidization kinetics were systematically clarified. In–situ analysis reveals a two–stage evolution mechanism mediated by CuNb interface decoupling. This work clarifies that filament refinement paradoxically lowers thermal stability due to synergistic size, strain, and interface effects.

纳米结构金属材料具有独特的界面强化效应。然而，它们的亚稳结构容易受到热活化的影响，从而影响高温热稳定性，严重限制了使用性能。本研究以胶辊法和累积拉伸键合法制备的铜铌纳米复合丝（CuNb NCWs）为研究对象，具体研究了两种样品，一种是长丝尺寸为100 nm的样品（真应变(η) = 14.0，一步退火），另一种是长丝尺寸为30 nm的样品（η = 16.8，两步退火），均在700℃下每步加热3 h。对长丝尺寸分别为100 nm和30 nm的CuNb NCWs进行了半原位淬火和原位加热透射电镜观察。研究了CuNb NCWs在高温下的热稳定性。研究了Cu基体和Nb长丝的再结晶和球化行为。当长丝尺寸为100 nm时，球化开始温度为700℃；当长丝尺寸为30 nm时，球化开始温度为600℃。分析了加热温度对其结构演变的影响。基于原位TEM加热，揭示了CuNb NCWs高温结构演化的动力学机制，系统阐明了微观结构参数对球化动力学的影响。原位分析揭示了CuNb界面解耦介导的两阶段演化机制。这项工作澄清了由于协同尺寸、应变和界面效应，细丝细化矛盾地降低了热稳定性。

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引用次数: 0

Hot oxidation and corrosion resistance of nickel-based superalloy Inconel 617 fabricated by wire arc additive manufacturing for powerplant applications 火电厂用电弧增材制造镍基高温合金Inconel 617的耐热氧化和耐腐蚀性能

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization

Pub Date : 2026-01-26 DOI: 10.1016/j.matchar.2026.116075

A. Rajesh Kannan , V. Rajkumar , N. Siva Shanmugam , C. Durga Prasad , V. Rajkumar , Hafiz Muhammad Rehan Tariq , Tea-Sung Jun

This study evaluates the high-temperature oxidation and corrosion resistance of Inconel 617 (IN617) fabricated using the Wire Arc Additive Manufacturing (WAAM) process, with a focus on its performance under hot air and molten salt environments at 700 °C. The as-built microstructure exhibited columnar dendritic grains, with chromium- and molybdenum-rich interdendritic precipitates. Electron Backscatter Diffraction analysis revealed a strong ⟨001⟩ fiber texture with localized strain. WAAM-processed IN617 exhibited higher weight gain in molten salt (15.34 mg/cm²) compared to air (1.72 mg/cm²), attributed to salt-induced oxide growth at high temperatures. Oxidation in hot air formed a protective Cr₂O₃ and NiCr₂O₄ spinel phase. In contrast, exposure to a Na₂SO₄–60%V₂O₅ molten salt produced a porous, brittle oxide layer containing Ni₃V₂O₈, Cr-V-O compounds, and sulfates, which caused severe scale breakdown, as confirmed by X-ray Photoelectron Spectroscopy (XPS). Parabolic rate constants indicated faster corrosion in molten salt (K_p = 5.16 × 10⁻¹⁰ g².cm⁻⁴.s⁻¹) than in air (K_p = 1.26 × 10⁻¹¹ g².cm⁻⁴.s⁻¹). WAAM IN617 exhibits good oxidation resistance in air but is severely degraded in environments containing sodium, vanadium, and sulfur, particularly at high temperatures.

本研究评估了采用电弧增材制造（WAAM）工艺制造的Inconel 617 （IN617）的高温抗氧化性和耐腐蚀性，重点研究了其在700°C热空气和熔盐环境下的性能。构建的显微组织为柱状枝晶，枝晶间有富铬和富钼的析出物。电子后向散射衍射分析显示⟨001⟩纤维结构具有局部应变。与空气（1.72 mg/cm2）相比，waam处理的IN617在熔盐中表现出更高的重量增加（15.34 mg/cm2），这归因于高温下盐诱导的氧化物生长。在热空气中氧化形成保护性的Cr2O3和NiCr2O4尖晶石相。相比之下，暴露于Na2SO4-60%V2O5熔盐中会产生一个含有Ni3V2O8、Cr-V-O化合物和硫酸盐的多孔脆性氧化层，x射线光电子能谱（XPS）证实了这一点，这导致了严重的水垢破裂。抛物线速率常数表明熔盐中的腐蚀速度更快（Kp = 5.16 × 10−10 g2.cm−4）。年代−1)比在空气中(Kp = 1.26×11 g2.cm 10−−4. s−1)。WAAM IN617在空气中表现出良好的抗氧化性，但在含有钠、钒和硫的环境中，特别是在高温下，会严重降解。

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引用次数: 0

Interface properties of oxide particles and their neutron irradiation response in a 12Cr ODS steel 12Cr ODS钢中氧化物颗粒的界面特性及其中子辐照响应

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization

Pub Date : 2026-01-26 DOI: 10.1016/j.matchar.2026.116076

Yufeng Du , Kenta Yoshida , Lijuan Cui , Somei Ohnuki , Yasuyoshi Nagai

Oxide dispersion strengthened (ODS) steels, which possess excellent mechanical properties and radiation tolerance, are considered promising candidate materials for cladding tubes of sodium-cooled fast reactors and first-wall/blanket structures of fusion reactors. Investigating the structural and interface properties and their evolution under neutron irradiation is essential for evaluating the stability of nanoparticles in ODS steels. In this study, several oxide particles in a 12Cr ODS steel were characterized by high-resolution transmission electron microscopy (HRTEM) in specimens before and after neutron irradiation to 0.3 dpa at 140 °C. The HRTEM images and corresponding fast Fourier transform (FFT) analysis revealed that two types of oxide particles, Y₂Ti₂O₇ with a fcc structure and YTiO₃ with an orthorhombic structure, coexisted in the steel. The Y₂Ti₂O₇ particles exhibit a cube-on-cube or cube-on-edge orientation relationship with the matrix, possessing semi-coherent interfaces. The YTiO₃ particles with coherent interfaces only show a cube-on-cube orientation relationship with the matrix. After irradiation, step edges and large dislocation loops appeared at the oxide/matrix interface.

氧化物弥散强化（ODS）钢具有优良的力学性能和耐辐射性能，是钠冷快堆包层管和聚变堆第一壁/包层结构的理想材料。研究纳米粒子在中子辐照下的结构和界面特性及其演变，是评价ODS钢中纳米粒子稳定性的重要手段。在本研究中，用高分辨率透射电镜（HRTEM）对140℃下0.3 dpa中子辐照前后12Cr ODS钢样品中的几种氧化物颗粒进行了表征。HRTEM图像和快速傅里叶变换（FFT）分析表明，钢中存在fcc结构的Y2Ti2O7和正交结构的YTiO3两种氧化物颗粒。Y2Ti2O7颗粒与基体呈立方体对立方体或立方体对边缘取向关系，具有半相干界面。具有相干界面的YTiO3粒子仅与基体呈立方体对立方体取向关系。辐照后，氧化物/基体界面出现阶梯边缘和大的位错环。

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引用次数: 0

The influence of heat treatment on precipitate formation in Scalmalloy®: In-situ X-ray diffraction investigation 热处理对Scalmalloy®中沉淀形成的影响：原位x射线衍射研究

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization

Pub Date : 2026-01-25 DOI: 10.1016/j.matchar.2026.116053

Fábio Faria Conde , André H.G. Gabriel , N. Schell , J.P. Oliveira , Julian A. Avila , Eduardo B. da Fonseca , Éder S.N. Lopes

Additive manufacturing offers a novel approach to producing lightweight components with complex geometries. Aluminum alloys, renowned for their low density and high mechanical properties, have emerged as prime candidates for this technology. Aluminum alloys, processed using laser-based powder bed fusion (PBF-LB), have gained significant interest in aerospace, construction, and automotive applications due to their lightweight properties, corrosion resistance, and fine-grained microstructure. Given its recent attention, PBF-LB Scalmalloy® samples were subjected to in-situ coupled experiments with heat treatments in a high-energy X-ray diffraction (HEXRD) beamline to collect diffractograms in transmission mode. Subsequently, transmission electron microscopy (TEM) was used to analyze the microstructure deeply and pursue the characterization of the formed precipitates. Results showed finely dispersed precipitates formed, which evolved slowly in lower heat-treatment temperatures, under 325 °C. In contrast, a higher temperature of 400 °C led to coarsening and hardness loss for long treatment periods.

增材制造为生产具有复杂几何形状的轻质部件提供了一种新颖的方法。铝合金以其低密度和高机械性能而闻名，已成为该技术的主要候选者。采用基于激光的粉末床熔合（PBF-LB）技术加工的铝合金，由于其轻质、耐腐蚀和细晶粒的微观结构，在航空航天、建筑和汽车应用中获得了极大的兴趣。鉴于其最近的关注，PBF-LB Scalmalloy®样品在高能x射线衍射（HEXRD）光束线上进行了热处理的原位耦合实验，以收集透射模式下的衍射图。随后，利用透射电子显微镜（TEM）对微观组织进行了深入分析，并对形成的析出物进行了表征。结果表明：在325℃以下，热处理温度较低，析出物较分散，析出物演化缓慢。相比之下，在400℃的高温下，长时间处理会导致粗化和硬度损失。

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引用次数: 0

Strengthening mechanisms and performance enhancement of laser surface treatment on Ti6Al4V/glass/ZrO2 brazed joints Ti6Al4V/玻璃/ZrO2钎焊接头激光表面处理强化机理及性能提高

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization

Pub Date : 2026-01-24 DOI: 10.1016/j.matchar.2026.116049

Yuanjie Chi , Fei Ji , Hui Chen, Yuanxing Li

This study investigates the strengthening effects and underlying mechanisms of brazed Ti6Al4V/bismuth-based sealing glass/ZrO₂ joints by comparing two surface pretreatment methods: thermal oxidation and laser surface treatment. Ti6Al4V and ZrO₂ ceramic brazing connections are widely used in electronic packaging, fuel cells, and other fields. Sealing glass selected as brazing filler for joining. However, the poor wettability between titanium alloy and glass requires surface pretreatment to improve bonding. Experiments show that the joint strength after laser treatment reached 46 MPa, significantly higher than the 35 MPa obtained by thermal oxidation. Interfacial analysis reveals that thermal oxidation primarily achieves bonding through elemental interdiffusion and chemical reactions. In contrast, laser treatment not only facilitates elemental diffusion and chemical reactions, but also induces the precipitation of Bi spherical particles, resulting in a dispersion strengthening effect. Simultaneously, brazing filler infiltrates laser-generated pits to form mechanical interlocking structures, synergizing chemical and mechanical reinforcement.

通过比较热氧化和激光表面处理两种表面处理方法，研究了Ti6Al4V/铋基密封玻璃/ZrO2钎焊接头的强化效果及其机理。Ti6Al4V和ZrO2陶瓷钎焊连接广泛应用于电子封装、燃料电池等领域。选用密封玻璃作为钎焊填料进行连接。但钛合金与玻璃之间的润湿性较差，需要进行表面预处理以改善粘结。实验表明，激光处理后的接头强度达到46 MPa，明显高于热氧化处理后的35 MPa。界面分析表明，热氧化主要通过元素间扩散和化学反应实现键合。相比之下，激光处理不仅有利于元素扩散和化学反应，还会导致Bi球形颗粒的析出，产生弥散强化效应。同时，钎焊填料渗入激光产生的凹坑，形成机械联锁结构，协同化学和机械加固。

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引用次数: 0

An investigation of synergistic tribo-corrosion mechanism of Inconel 625 cladding layer in a solid-liquid flow 固液流动中Inconel 625熔覆层协同摩擦腐蚀机理的研究

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization

Pub Date : 2026-01-24 DOI: 10.1016/j.matchar.2026.116062

J.Z. Wu , T. Zhao , Q.L. Li , T.Y. Ai , D.Y. Li , X.B. Wang , Z.W. Xie

The Cold Metal Transfer (CMT) process demonstrates significant potential in industrial applications such as dissimilar welding, surface modification, repair, and even additive manufacturing, owing to its distinct benefit of minimal thermal input. In this study, Inconel 625 surface modified cladding layers were prepared to investigate the root cause of the premature failure in 316 L stainless steel in tribo-corrosion service environment, and the mechanism of synergistic tribo-corrosion damage of gas tungsten arc welding and CMT cladding layers was revealed. Compared to GTAW process, the unique rapid cooling characteristics of the CMT process induced greater lattice distortion and higher residual tensile stress within the cladding layer. However, it also led to a smaller average grain size (56.4 ± 2.1 μm) and finer precipitates (Laves + MC), and a higher proportion of low-angle grain boundaries (LAGBs, 91.2%). Additionally, the relatively higher content of passivation-promoting elements (Cr-Mo-Nb) in the CMT cladding layer contributes to the superior corrosion resistance tendency (R_p = 185.07 kΩ·cm²) and faster passive film growth rate in 3.5 wt% NaCl solution. More significantly, potential of zero charge combined with Mott-Schottky analysis collectively validated that the n-type passivation film on the CMT cladding layer possesses a stronger repulsive capability against Cl⁻ (ΔE = -0.75 V) and a lower charge carrier density (N_D = 3.53 ± 0.02 × 10²²·cm⁻³), which enables the cladding layer to maintain excellent self-passivation and protective effects during mechanical abrasion processes, consequently demonstrated approximately twice the anti-synergistic tribo-corrosion (STC) resistance of the 316 L substrate in 3.5 wt% NaCl solution.

冷金属转移（CMT）工艺在不同焊接、表面改性、修复甚至增材制造等工业应用中显示出巨大的潜力，因为它具有最小热输入的独特优势。本研究制备了Inconel 625表面改性熔覆层，研究了316l不锈钢在摩擦腐蚀使用环境下过早失效的根本原因，揭示了气体钨极保护焊和CMT熔覆层摩擦腐蚀协同损伤的机理。与GTAW工艺相比，CMT工艺独特的快速冷却特性导致了更大的晶格畸变和更高的熔覆层残余拉伸应力。但平均晶粒尺寸更小（56.4±2.1 μm），析出相更细（Laves + MC），低角度晶界比例更高（LAGBs, 91.2%）。此外，在3.5 wt% NaCl溶液中，CMT熔覆层中较高的促钝化元素Cr-Mo-Nb含量使得CMT熔覆层具有较好的耐蚀倾向（Rp = 185.07 kΩ·cm2）和较快的钝化膜生长速率。更重要的是，零电荷电位结合Mott-Schottky分析共同验证了CMT熔覆层上的n型钝化膜对Cl−具有较强的排斥能力（ΔE = -0.75 V）和较低的载子密度（ND = 3.53±0.02 × 1022·cm−3），使熔覆层在机械磨损过程中保持良好的自钝化和保护作用。结果表明，在3.5 wt% NaCl溶液中，316 L衬底的抗协同摩擦腐蚀（STC）能力大约是其两倍。

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引用次数: 0

Creep behavior and microstructural degradation of advanced 12% Cr-3% Co steel with low N and high B contents during creep at various elevated temperatures 低氮高硼高级12% Cr-3% Co钢在不同高温蠕变过程中的蠕变行为及显微组织退化

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization

Pub Date : 2026-01-24 DOI: 10.1016/j.matchar.2026.116044

A. Fedoseeva , A. Dolzhenko , A. Klauz , А. Khalyavina , R. Kaibyshev

引用次数: 0