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Corrosion protection of mild-steel in 1M HCl using nanocomposite from Triumfetta rhomboidei 菱形花纳米复合材料对低碳钢在1M HCl中的防腐作用
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-05-14 DOI: 10.1080/02670836.2023.2210919
Bamidele E. Agbaffa, E. Olasehinde, M. Adebayo
Titanium nanocomposite (TiTR) was synthesised from Triumfetta rhomboidea leaf extract and used as corrosion protection of mild steel (MS) in 1 M hydrochloric acid. The corrosion inhibition process of the nanocomposite was explored using weight loss, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarisation (PDP). The corrosion inhibition performance of TiTR is a function of concentration and temperature. The results revealed that TiTR was 84.27% efficient in limiting MS corrosion at 1.0 g L−1 and 3 h. The TiTR acted as a mixed-type corrosion inhibitor and Langmuir isotherm indicated that TiTR was adsorbed on mild steel through physisorption by forming a monolayer of film. Surface morphology study of MS visually confirmed the protection of MS by TiTR through film formation.
以三棱叶提取物为原料合成钛纳米复合材料(TiTR),并将其用于低碳钢(MS)在1 M盐酸中的防腐。利用失重、电化学阻抗谱(EIS)和动电位极化(PDP)对纳米复合材料的缓蚀过程进行了研究。tir的缓蚀性能是浓度和温度的函数。结果表明,在1.0 g L−1和3 h时,TiTR对MS腐蚀的限制效率为84.27%。Langmuir等温线表明,TiTR作为混合型缓蚀剂通过物理吸附在低碳钢上形成单层膜。质谱的表面形貌研究直观地证实了TiTR通过成膜对质谱的保护作用。
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引用次数: 1
Gas detonation-prepared nano-carbon-based capsule matrix materials: characterisation and microwave-absorption properties 气体爆轰制备的纳米碳基胶囊基材料:表征和微波吸收性能
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-05-11 DOI: 10.1080/02670836.2023.2210436
Li Xueqi, Xiaojie Li, H. Yan, Xiaohong Wang, Haifeng Gong
Carbon-based capsule nanomaterials were synthesised through gas-phase detonation using acetylene gas, oxygen, and pentacarbonyl iron. The resulting nanoparticles consisted of a thin layer of capsule-like amorphous carbon with a high specific surface area and strong adsorption capacity. The products exhibited good electromagnetic properties with good reflection loss and absorption capabilities in the frequency range 2–18 GHz. The effective response frequency band ranged from 10.12 to 11.30 GHz, and the reflection loss reached 10.94 dB at 10.96 GHz. The absorption mechanism was mainly owing to dielectric loss as no significant magnetic loss was observed. These nanomaterials have the potential to be used as a matrix for carrying other nanomaterials and for adjusting the impedance-matching of composite materials, thereby enhancing electromagnetic-wave absorption.
以乙炔气、氧和五羰基铁为原料,通过气相爆轰法制备了碳基胶囊纳米材料。所得的纳米颗粒由一层薄薄的胶囊状无定形碳组成,具有高比表面积和强吸附能力。产品具有良好的电磁性能,在2-18 GHz频率范围内具有良好的反射损耗和吸收能力。有效响应频带范围为10.12 ~ 11.30 GHz,在10.96 GHz处反射损耗达到10.94 dB。吸收机制主要是由于介质损耗,没有观察到明显的磁损耗。这些纳米材料有潜力用作承载其他纳米材料的基质,并调节复合材料的阻抗匹配,从而增强电磁波吸收。
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引用次数: 0
Effects of processing parameters on the LPBF-deposited AlSi10Mg/SiCp composite: microstructure and mechanical properties 工艺参数对lpbf沉积AlSi10Mg/SiCp复合材料显微组织和力学性能的影响
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-05-09 DOI: 10.1080/02670836.2023.2208920
Yan Chen, Z. Jian, Kan Li, K. Song, Yongming Ren, Yongqin Liu, B. Dang, Man Zhu, Qian Gao
Adding SiC particle (SiCp) to Al alloys to form Al/SiCp composite can increase the elastic modulus and reduce the thermal expansion coefficient of the material. In this study, the microstructure, porosity and thermal expansion coefficient, and mechanical properties of AlSi10Mg-10 vol.% SiCp composite fabricated by laser powder bed fusion (LPBF) were investigated. The ultimate tensile strength, compressive strength, compressive modulus, and the thermal expansion coefficient of LPBF-deposited AlSi10Mg/SiCp composite are 351, 861.9 MPa, 121.9 GPa and 18.23 × 10−6°C−1, respectively. The results demonstrate that the use of the E v equation to evaluate the effect of LPBF parameters on mechanical properties and relative density of the composites is accurate when only one parameter changes in the E v equation.
在铝合金中加入SiC颗粒(SiCp)形成Al/SiCp复合材料,可以提高材料的弹性模量,降低材料的热膨胀系数。本文研究了alsi10mg - 10vol的显微组织、孔隙率、热膨胀系数和力学性能。研究了激光粉末床熔融法制备% SiCp复合材料。lpbf沉积AlSi10Mg/SiCp复合材料的抗拉强度、抗压强度、抗压模量和热膨胀系数分别为351、861.9 MPa、121.9 GPa和18.23 × 10−6°C−1。结果表明,当E - v方程中只有一个参数发生变化时,利用E - v方程来评价LPBF参数对复合材料力学性能和相对密度的影响是准确的。
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引用次数: 1
Carbon superstructure nanoflower derived from self-assembly of polyimide for superior lithium storage 由聚酰亚胺自组装而成的碳超结构纳米花,具有优异的锂存储性能
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-05-09 DOI: 10.1080/02670836.2023.2210447
Shubing Li, Ben Fei
In this paper, three-dimensional carbon superstructures (CSSs) have been proposed through an effective method. Specifically, the hierarchical self-assembly of polyimide (PI) is followed by thermal annealing. Moreover, the structural evolution of PI under the various pyrolysis time was also comprehensively studied. It is noted that the as-prepared CSSs as anode composites for LIBs, especially CSS-5 h, exhibited extraordinary electrochemical properties, exhibiting a high reversible performance, great rate performance, and excellent cycling stability. As expected, the superior electrochemical capability can be ascribed to the synergistic effect of combining the nanoflower-like carbon superstructures with nitrogen contents. Such a method might encourage the inspirations to devise and obtain various heteroatom-modulated and hierarchical polymer-derived carbon composites for LIBs.
本文通过一种有效的方法,提出了三维碳超结构。具体来说,聚酰亚胺(PI)的分层自组装之后是热退火。此外,还对不同热解时间下PI的结构演化进行了全面研究。结果表明,制备的css作为锂离子电池的阳极复合材料,特别是CSS-5 h具有优异的电化学性能,具有高的可逆性能、高的速率性能和良好的循环稳定性。正如预期的那样,优异的电化学性能可归因于纳米花状碳超结构与氮含量相结合的协同效应。这种方法可能会激发设计和获得各种杂原子调制和分层聚合物衍生的LIBs碳复合材料的灵感。
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引用次数: 0
The microstructure and mechanical properties of aluminum/steel welded joint by FSLW 铝/钢FSLW焊接接头的组织和力学性能
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-05-08 DOI: 10.1080/02670836.2023.2207992
Shengyin Liu, G. Wan, Xiao‐Qin Shen, X. Li, Yuxin Peng, Chuansong Xia, Yifan Zhao, Xinbin Hu, W. Long
Friction stir lap welding experiments between 6061 aluminum alloy and DP590 dual-phase steel plates were carried out. The effects of welding parameters and the addition of Cu foil interlayers with 0–0.3 mm thickness on the microstructures and mechanical properties of the lap joints were investigated. The shear strength of the joint reached the maximum value of 5337 N and showed a mixed ductile-brittle fracture mode when the welding speed, the rotating speed, and the thickness of the Cu foil intermediate layer were set to 80 mm/min, 900 rpm, and 0.1 mm, respectively. The plastic Al2Cu and AlCu intermetallic compounds formed through Al and Cu reaction at the aluminium alloy/steel interface play a beneficial role in the Cu-added joint strength.
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引用次数: 1
Classification of defects in additively manufactured nickel alloys using supervised machine learning 利用监督式机器学习对增材制造镍合金缺陷进行分类
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-05-07 DOI: 10.1080/02670836.2023.2207337
Ubaid Aziz, A. Bradshaw, J. Lim, Meurig Thomas
The presence of undesirable microstructural features in additively manufactured components, such as cracks, pores and lack of fusion defects presents a challenge for engineers, particularly if these components are applied in structure-critical applications. Such features might need to be manually classified, counted and their size distributions measured during metallographic evaluation, which is a time-consuming task. In this study, the performance of two supervised machine learning methods (kth-nearest neighbours and decision trees) to automatically classify typical defects found during metallographic examination of additively manufactured nickel alloys is briefly outlined and discussed.
在增材制造的部件中存在不良的微观结构特征,如裂纹、孔隙和缺乏融合缺陷,这对工程师来说是一个挑战,特别是当这些部件应用于结构关键应用时。在金相评价过程中,这些特征可能需要人工分类、计数和测量其尺寸分布,这是一项耗时的任务。在本研究中,简要概述和讨论了两种监督机器学习方法(第k近邻和决策树)在增材制造镍合金金相检查中发现的典型缺陷自动分类的性能。
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引用次数: 0
Strong and ductile medium-Mn steel achieved via controlled martensite tempering 通过控制马氏体回火获得坚固和延展性的中锰钢
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-05-07 DOI: 10.1080/02670836.2023.2207371
Yi Li, Baolin Zhang, Q. Guan, Binbin He
The present work simplifies the previous room-temperature quenching and partitioning (RT Q&P) process down to a single furnace cooling process, delivering a medium Mn steel with an ultimate tensile strength (UTS) of 1.7 GPa and a uniform elongation of 9.5%. The martensite tempering during furnace cooling is featured with slightly reduced dislocation density and is free of cementite precipitation, which is beneficial for ultrahigh UTS. Although the carbon partitioning is limited, the banded large austenite grains have proper mechanical stability owing to pre-existing high carbon content and the strong martensite matrix, allowing the gradual transformation-induced plasticity (TRIP) effect to enhance the work hardening behaviour and thus the good uniform elongation.
目前的工作将以前的室温淬火和分割(RT Q&P)过程简化为单炉冷却过程,从而获得了具有1.7 GPa极限拉伸强度(UTS)和9.5%均匀伸长率的中Mn钢。炉内冷却马氏体回火时,位错密度略有降低,无渗碳体析出,有利于超高UTS的产生。尽管碳分配有限,但由于存在高碳含量和强马氏体基体,带状大奥氏体晶粒具有适当的机械稳定性,允许逐渐转变诱导塑性(TRIP)效应增强加工硬化行为,从而获得良好的均匀伸长率。
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引用次数: 0
Research on crack propagation behaviour of nickel-based superalloy under thermal shock load 热冲击载荷下镍基高温合金裂纹扩展行为研究
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-05-04 DOI: 10.1080/02670836.2022.2154932
X. Niu, Rutao Zhao, Zhigang Sun, Yingdong Song, Yaning Chang
In this paper, the crack initiation and propagation laws of GH4169 under thermal-shock load were investigated. It was found that the development of main cracks experienced three stages: accelerated growth in the small crack stage, decelerated growth in the long crack stage and finally discontinued growth. With the increase of temperature, the crack initiation life decreases and the propagation rate increases, the crack initiation life at 600°C is six times to that at 700°C. A thermal fatigue crack growth model was proposed to character the whole crack growth process, and a comparison was drawn with the Paris and Z-H model. The results show that the model is applicable to predict the whole process growth rate of thermal fatigue cracks.
研究了GH4169在热冲击载荷作用下的裂纹萌生和扩展规律。研究发现,主裂纹的发展经历了三个阶段:小裂纹阶段加速扩展,长裂纹阶段减速扩展,最后停止扩展。随着温度的升高,裂纹起裂寿命减小,扩展速率增大,600℃时的裂纹起裂寿命是700℃时的6倍。提出了表征裂纹扩展全过程的热疲劳裂纹扩展模型,并与Paris模型和Z-H模型进行了比较。结果表明,该模型可用于预测热疲劳裂纹的全过程扩展速率。
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引用次数: 0
Anisotropy of nanoindentation in copper single crystals under different orientations 铜单晶纳米压痕在不同取向下的各向异性
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-05-04 DOI: 10.1080/02670836.2023.2205771
Maohong Yang, Jian-Long Huang, Yulong Liu, W. Yuan, Guiyi Wu, Shuyan Zhang
The anisotropy of nanoindentation in copper single crystals is studied through experiments and simulations. Nanoindentation tests with different orientations were carried out, and the depth was 20nm-500nm. Simulations were carried out using crystal plasticity finite element method. The results show that sample with different orientations present anisotropic with increase of indentation depth. The accumulated plastic strains of the samples with different orientations are different due to the different angle between the loading direct and the normal to the slip surface. The cumulative plastic strain of oriented samples is the smallest, and orientation is the largest. The amount of slip coefficients initiated simultaneously for samples with different orientations is responsible for the differences in nanoindentation properties.
通过实验和模拟研究了铜单晶纳米压痕的各向异性。进行了不同取向的纳米压痕试验,深度为20nm ~ 500nm。采用晶体塑性有限元法进行了数值模拟。结果表明,随着压痕深度的增加,不同取向的试样呈现出各向异性。不同取向试样的累积塑性应变由于加载方向与滑动面法向夹角的不同而不同。取向试样的累积塑性应变最小,取向最大。不同取向样品同时产生的滑移系数的多少是导致纳米压痕性能差异的主要原因。
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引用次数: 0
Study on brazing WC-6Co/In718 with in-situ synthesis of Ni/Cu/AgCuNiMn solder 原位合成Ni/Cu/AgCuNiMn钎料钎焊WC-6Co/In718的研究
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-05-04 DOI: 10.1080/02670836.2023.2205774
P. Liu, Sujuan Zhong, Y. Pei, Guanxing Zhang, Guidong Mo, G. Wang
Based on AgCuNiMn alloy, Ni/Cu/AgCuNiMn high-Ni solder was designed by in-situ synthesis. The WC-6Co/In718 joint was prepared by vacuum brazing at 950 °C for 10 min. The effect of metal foil on the filler metal filling ability, microstructure and mechanical properties of the joint was studied. The microstructure evolution and strengthening mechanism of the joint brazed with Ni/Cu/AgCuNiMn solder were analysed. The results showed that Ni element mainly plays a solution-strengthening role on the joint, and improve the interface bonding strength and the strength of Ag (s, s) distributed in the centre of the brazed joint, which increased the average tensile strength by 32.4% (from 426.5 to 564.7 MPa).
基于AgCuNiMn合金,采用原位合成方法设计了Ni/Cu/AgCuNiMn高镍钎料。采用950℃真空钎焊10 min制备WC-6Co/In718接头。研究了金属箔对钎料填充能力、接头组织和力学性能的影响。分析了Ni/Cu/AgCuNiMn钎料钎焊接头的显微组织演变及强化机理。结果表明:Ni元素在钎焊接头上主要起固溶强化作用,提高了界面结合强度和分布在钎焊接头中心的Ag (s, s)的强度,使钎焊接头的平均抗拉强度从426.5提高到564.7 MPa,提高了32.4%;
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引用次数: 0
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Materials Science and Technology
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