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Acta Metallurgica Sinica(English Letters) 2024年第1期37卷 159-168页

作者： Hongyu Zheng Xin Gai Yun Bai Wentao Hou Shujun Li yulin hao R.D.K.Misra Rui Yang Institute of Metal Research Chinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Nuclear Power Institute of China Chengdu610213China Department of Metallurgical Materialsand Biomedical EngineeringThe University of Texas at El Paso500WUniversity AvenueEl PasoTX79968USA

The electrochemical behavior of Ti-6Al-4V with 1 mm and 16 mm thickness prepared by electron beam powder bed fusion(EB-PBF)was investigated in phosphate buffered *** results showed that EB-PBF Ti-6Al-4V with a larger component size was more resistant to corrosion compared to the smaller component,because of less acicularαʹphase content and moreβphase *** a non-equilibrium phase in the“high-energy state”,αʹphase has a greater susceptibility to corrode and reduces the corrosion resistance of the material,whileβphase improves corrosion resistance of titanium *** results show that the phase composition has a more significant effect on the corrosion performance than the grain size.

关键词： Electron beam powder bed fusion Ti6Al4V alloy Corrosion resistance Component size Polarisation

TBF980钢表面氧化物组成和结构在磷化过程中的变化

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机械工程材料 2024年第3期48卷 1-7页

作者：蔡宁龙袁郝玉林姚士聪首钢集团有限公司技术研究院绿色可循环钢铁流程北京市重点实验室北京100043

利用碳萃取复型技术结合扫描电镜、透射电镜、能谱等方法分析了不同时间(0~90 s)磷化处理后TBF980冷轧连退钢表面氧化物的组成、形态及晶体结构变化。结果表明:试验钢表面氧化物主要由薄膜状非晶态SiO_(x)以及MnSiO_(3)单晶颗粒组成。... 详细信息

利用碳萃取复型技术结合扫描电镜、透射电镜、能谱等方法分析了不同时间(0~90 s)磷化处理后TBF980冷轧连退钢表面氧化物的组成、形态及晶体结构变化。结果表明:试验钢表面氧化物主要由薄膜状非晶态SiO_(x)以及MnSiO_(3)单晶颗粒组成。随着磷化时间的延长,表面氧化物数量减少,硅、锰元素含量显著降低,但是当磷化膜完全覆盖试验钢表面时,磷化膜与基体之间仍然存在一层氧化物。在磷化过程中,大部分非晶态SiO_(x)薄膜先断裂再卷成球形,并在磷化液的作用下脱离试验钢表面,小部分保留在磷化膜与基体界面处;MnSiO_(3)单晶在磷化液的作用下先转变成非晶态SiO_(x)与MnSiO_(3)纳米晶的复合颗粒,再完全转变成非晶态SiO_(x)。

关键词：冷轧连退钢表面氧化物碳萃取复型技术

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低碳铝镇静钢汽车板磷化性能及改善对策研究

电镀与精饰 2024年第2期46卷 22-29页

作者：张亮郝玉林刘兴全林兴明孙鹏王志涛北京首钢股份有限公司北京100041 首钢集团有限公司技术研究院北京100043 天津首钢钢铁贸易有限公司天津300000

为解决低碳铝镇静钢汽车板在磷化工艺下限条件下磷化膜结晶粗大及覆盖率不足问题,采用扫描电镜(SEM)、表面轮廓仪、辉光光谱仪(GDS)及透射电镜(TEM)研究了低碳铝镇静钢汽车板磷化性能关键影响因素,并提出了改善对策。结果表明:当磷化工... 详细信息

为解决低碳铝镇静钢汽车板在磷化工艺下限条件下磷化膜结晶粗大及覆盖率不足问题,采用扫描电镜(SEM)、表面轮廓仪、辉光光谱仪(GDS)及透射电镜(TEM)研究了低碳铝镇静钢汽车板磷化性能关键影响因素,并提出了改善对策。结果表明:当磷化工艺处于下限条件即促进剂浓度、总酸浓度较小,而游离酸浓度较大时,钢板与磷化液界面磷酸盐不易饱和,磷化形核难度加大,导致磷化结晶粗大及覆盖率不足等问题。但当钢板表面存在均匀分布且数量较多的小尺寸氧化物颗粒时,氧化物与铁基体能够形成大量原电池,提升局部磷化酸蚀及沉积反应速度,进而改善磷化性能。通过对低碳铝镇静钢碳含量及退火快冷段、过时效段温度进行控制,成功在钢板表面析出尺寸较小且均分分布的碳化物。由于碳化物与铁基体之间存在电位差,同样增加了钢板表面原电池数量,促进了磷化形核,所获得的磷化膜晶粒尺寸在5μm以下,覆盖率为100%。

关键词：低碳铝镇静钢磷化氧化物碳化物

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车用先进高强钢表面分析及胶接性能研究

表面技术 2024年第4期53卷 211-219页

作者：邵蓉黎敏刘永壮曹建平郝玉林蔡宁李学涛首钢集团有限公司技术研究院北京100043 绿色可循环钢铁流程北京市重点实验室北京100043

目的明确不同先进高强钢表面氧化物形貌、成分及含量对胶接性能的影响规律。方法本研究采用白光干涉仪、扫描电子显微镜(SEM)及透射电子显微镜(TEM)观察高强钢表面形貌,通过金相显微镜及X射线衍射仪(XRD)分析其显微组织及物相,采用直读... 详细信息

目的明确不同先进高强钢表面氧化物形貌、成分及含量对胶接性能的影响规律。方法本研究采用白光干涉仪、扫描电子显微镜(SEM)及透射电子显微镜(TEM)观察高强钢表面形貌,通过金相显微镜及X射线衍射仪(XRD)分析其显微组织及物相,采用直读光谱仪、辉光光谱仪(GDS)以及X射线光电子能谱仪(XPS)表征高强钢表面特征元素及氧化物种类。结合接触角测试对比不同高强钢表面润湿性,并分析总结高强钢表面成分对胶接性能的影响规律。结果DH780表面以膜层状Al基氧化物为主,DP980、DP1180以及CP1180表面以Si、Mn、Cr颗粒状氧化物为主。其中DH780的表面润湿性最差,自由能最小。CP1180钢表面具有最少的氧化物含量及最小的颗粒尺寸,其表面润湿性最好,表面自由能最高。DP钢随强度提高,表面氧化物含量增加,润湿性降低。对于同种焊装胶,DH780胶接剪切强度最小,CP1180剪切强度最大。结论高强钢表面氧化物富集对表面润湿性及表面自由能具有重要影响,尤其Al基氧化物的存在会明显降低胶接接头的剪切强度。一方面是氧化物导致表面自由能降低,黏附功下降,另一方面氧化物会阻止胶中极性基团与基体表面形成强化学键,而更多地形成氢键。Al基氧化物由于呈薄膜状覆盖于高强钢表面,故对胶接性能的影响最大。

关键词：先进高强钢表面成分润湿性胶接性能

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Electrochemical behavior of open-cellular structured Ti-6Al-4V alloy fabricated by electron beam melting in simulated physiological fluid:the significance of pore characteristics

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Journal of Materials Science & Technology 2022年第2期97卷 272-282页

作者： Xin Gai Rui Liu Yun Bai Shujun Li Yang Yang Shenru Wang Jianguo Zhang Wentao Hou yulin hao Xing Zhang Rui Yang R.D.K.Misra Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Department of Orthopedic Surgery Peking Union Medical College Hospital(PUMCH)Peking Union Medical College and Chinese Academy of Medical SciencesBeijing 100730China Department of Metallurgical Materialsand Biomedical EngineeringThe University of Texas at El Paso500W.University AvenueEl PasoTX 79968United States

The cellular structured titanium alloys have attracted significant attention for implants because of their lower Young’s modulus,which is comparable to human bone and has the capability of providing space for bone tissue ***,there is a gap in the knowledge in regard to the relationship between the pore characteristics and the electrochemical performance of open-cellular structured titanium *** this study,we elucidate the influence of pore characteristics on the electrochemical performance of open-cellular structured Ti-6Al-4V alloys produced by electron beam melting(EBM).Intriguingly,the passive film formed on cellular structured Ti-6Al-4V alloy with a larger pore size was more stable and protective,and the corrosion performance was superior compared to the samples with a smaller pore size in phosphate buffered saline(PBS),mainly because of relatively smaller exposed surface area and unlimited flow of ***,in acidic PBS containing fluoride ions,the pore characteristics did not play an important role in the corrosion *** was considered that the protective film breaks down such that the corrosion performance of cellular structured alloys was comparable to each other in this harsh environment.

关键词： Cellular structure Ti-6Al-4V Electron beam melting Corrosion resistance Fluoride ion

Effect of Elastic Modulus on Biomechanical Properties of Lumbar Interbody Fusion Cage

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Journal of Materials Science & Technology 2009年第3期25卷 325-328页

作者： Yue Zhu Fusheng Li Shujun Li yulin hao Rui Yang Department of Orthopaedics the First Affiliated Hospital of China Medical University Shenyang 110001 China Department of Bone Tumor The Peoplers Hospital of Liaoning Province Shenyang 110016 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

This work focuses on the influence of elastic modulus on biomechanical properties of lumbar interbody fusion cages by selecting two titanium alloys with different elastic modulus. They were made by a new β type alloy with chemical composition of Ti-24Nb-4Zr-7.6Sn having low Young＇s modulus -50 GPa and by a conventional biomedical alloy Ti-6Al-4V having Young＇s modulus -110 GPa. The results showed that the designed cages with low modulus （LMC） and high modulus （HMC） can keep identical compression load -9.8 kN and endure fatigue cycles higher than 5× 10^6 without functional or mechanical failure under 2.0 kN axial compression. The anti-subsidence ability of both group cages were examined by axial compression of thoracic spine specimens （T9-T10） dissected freshly from the calf with averaged age of 6 months. The results showed that the LMC has better anti-subsidence ability than the HMC （p〈0.05）. The above results suggest that the cage with low elastic modulus has great potential for clinical applications.

关键词： Titanium alloy Lumbar Interbody fusion cage Biomechanics

Frameworked electrolytes:Ionic transport behavior and high mobility for solid state batteries

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InfoMat 2024年第2期6卷 76-89页

作者： Jianguo Sun hao Yuan Jing Yang Tuo Wang yulin Gao Qi Zhao Ximeng Liu Haimei Wang Yong-Wei Zhang John Wang Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore Institute of High Performance Computing(IHPC) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore ST Engineering Advanced Material Engineering Pte.Ltd. SingaporeSingapore National University of Singapore(Chongqing)Research Institute Chongqing Liang Jiang New AreaChongqingthe People's Republic of China Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore

All solid-state batteries(ASSBs)are the holy grails of rechargeable batteries,where extensive searches are ongoing in the pursuit of ideal solid-state ***,there is still a long way off to the satisfactorily high(enough)ionic conductivity,long-term stability and especially being able to form compatible interfaces with the solid ***,we have explored ionic transport behavior and high mobility in the sub-nano pore networks in the framework ***,the frameworked electrolyte behaves as a solid,and however in the(sub)-nano scales,the very limited number of solvent molecules in confinement makes them completely different from that in liquid *** from a liquid-electrolyte counterpart,the interactions between the mobile ions and surrounding molecules are subject to dramatic changes,leading to a high ionic conductivity at room temperature with a low activation ***+ions in the sub-nano cages of the network structure are highly mobile and diffuse rather independently,where the rate-limiting step of ions crossing cages is driven by the local concentration gradient and the electrostatic interactions between Li^(+)*** new class of frameworked electrolytes(FEs)with both high ionic conductivity and desirable interface with solid electrodes are demonstrated to work with Li-ion batteries,where the ASSB with LiFePO_(4)shows a highly stable electrochemical performance of over 450 cycles at 2℃ at room temperature,with an almost negligible capacity fade of 0.03‰ each *** addition,the FE shows outstanding flexibility and anti-flammability,which are among the key requirements of large-scale applications.

关键词： frameworked electrolyte macroscopically solid with 3D ionic channels in sub-nano-scales solid-state battery space confinement of Li ions

Effect of fluoride on the corrosion behavior of nanostructured Ti-24Nb-4Zr-8Sn alloy in acidulated artificial saliva

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Journal of Materials Science & Technology 2018年第9期34卷 1660-1670页

作者： Ji Li Yun Bai Zhidong Fan Shujun Li yulin hao Rui Yang Yongbo Gao Xi'an Thermal Power Research Institute Co. Ltd. Xi'an 710032 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Department of Stomatology Longgang District Central Hospital Affiliated to Zunyi Medical College Shenzhen 518116 China

The surface of titanium dental implants is highly susceptible to aggressive fluoride ions in the oral environment. Nanotechnology has proven an effective approach to improve the stability and corrosion resistance of titanium by applying a passive film. In this study, we investigated the effects of fluoride on the corrosion behavior of nanostructured（NS） Ti-24 Nb-4 Zr-8 Sn（Ti2448） alloy in acidulated artificial saliva（AAS）at 37 ℃, and then conducted comparisons with its coarse grained（CG） counterpart. Electrochemical techniques, such as potentiodynamic polarization and electrochemical impedance spectroscopy（EIS）, as well as surface analysis including X-ray photoelectron spectroscopy（XPS） with argon ion sputtering, and scanning electronic microscopy（SEM） were employed to evaluate the effects of fluoride on sensitivity to pitting and the tolerance of Ti2448 to fluoride in AAS solution. The results demonstrate that corrosion current density increased with F-concentration. In all respects, the NS Ti2448 alloy presented corrosion resistance superior to that of its coarse grained（CG） counterpart at low F-concentrations（0.1%）.Furthermore, a high content of F-（1%） was shown to promote the active dissolution of both alloys by increasing the rate of corrosion. Following immersion in the fluoridated AAS solution for 60 days, a tissuefriendly compound, Ca3（PO4）2, was detected on the surface of the NS when F-= 0.01% and Na2 TiF6 was identified as the main component in the corrosion products of the CG as well as NS Ti2448 alloys when F-= 1%. High concentrations of F-produced pitting corrosion on the CG alloy, whereas NS Ti2448 alloy presented general corrosion in the form of lamellar separation under the same conditions. These findings demonstrate the superior corrosion resistance of the NS Ti2448 alloy as well as lower pitting sensitivity and higher tolerance to fluoride due mainly to grain refinement.

关键词： Titanium Fluoride Corrosion Nanostructuring Ti2448

Mixture of Oxides with Different Valence States in Nanotubes

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Journal of Materials Science & Technology 2016年第2期32卷 142-146页

作者： Xiaoli Zhao Meilin Dai Shujun Li yulin hao Rui Yang Lei Wang Yandong Liu Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education) School of Materials and Metallurgy Northeastern University Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences

Oxide nanotubes with different diameters and lengths were fabricated on the biomedical Ti2448 alloy by anodic oxidation in neutral electrolyte. Similar to oxide nanotubes fabricated on pure titanium and its alloys, the as-grown nanotubes on Ti2448 also exhibit gradually changing chemical distribution along the direction of tube growth. Furthermore, several kinds of oxides with different valence states （MxOy） are formed simultaneously for each alloying element M, while their volume fractions vary gradually along the tube-growth direction. The findings of this study would provide insight into the effect of valence states on the desired nanotube properties and help develop ways to enhance the properties of the preferred oxide.

关键词： Biomedical titanium alloy Oxide nanotube Anodic oxidation Chemical distribution

Heat treatment enhancing the compressive fatigue properties of open-cellular Ti-6Al-4V alloy prototypes fabricated by electron beam melting

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Journal of Materials Science & Technology 2018年第7期34卷 1127-1131页

作者： Wei Yuan Wentao Hou Shujun Li yulin hao Rui Yang Lai-Chang Zhang Yue Zhu Department of Orthopedics First Hospital of China Medical University Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences School of Engineering Edith Cowan University

In this work, we report the effect of annealing in α＋β phase field on the fatigue properties of Ti-6A1-4V alloy meshes fabricated by electron beam melting. The results show that annealing at high temperature near the phase boundary enhances the ductility of the brittle mesh struts due to the formation of coarse α lamellas with a large thickness/length ratio. Accordingly, the fatigue endurance ratio of the studied meshes increases to up to -0.6, which is much superior to that of the as-fabricated counterparts and comparable to those of dense materials.2018 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science ＆ Technology.

关键词： Titanium alloy Reticulated mesh Annealing treatment Morphology Fatigue endurance