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Microstructural Evolution and Mechanical Properties of Inconel 625 Alloy during Pulsed Plasma Arc Deposition Process

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Journal of Materials Science & Technology 2013年第5期29卷 480-488页

作者： Fujia Xu yaohui lv Yuxin Liu Fengyuan Shu Peng He Binshi Xu State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology National Key Laboratory for Remanufacturing Academy of Armored Forces Engineering

Pulsed plasma arc deposition （PPAD）, which combines pulsed plasma cladding with rapid prototyping, is a promising technology for manufacturing near net shape components due to its superiority in cost and convenience of processing. In the present research, PPAD was successfully used to fabricate the Ni-based superalloy Inconel 625 components. The microstructures and mechanical properties of deposits were investigated by scanning electron microscopy （SEM）, optical microscopy （OM）, transmission electron microscopy （TEM） with energy dispersive spectrometer （EDS）, microhardness and tensile testers. It was found that the as-deposited structure exhibited homogenous columnar dendrite structure, which grew epitaxially along the deposition direction. Moreover, some intermetallic phases such as Laves phase, minor MC （NbC, TiC） carbides and needle-like δ-Ni3Nb were observed in y-Ni matrix. Precipitation mechanism and distribution characteristics of these intermetallic phases in the as-deposited 625 alloy sample were analyzed. In order to evaluate the mechanical properties of the deposits, microhardness was measured at various location （including transverse plane and longitudinal plane）. The results revealed hardness was in the range of 260- 285 HVo.2. In particular, microhardness at the interface region between two adjacent deposited layers was slightly higher than that at other regions due to highly refined structure and the disperse distribution of Laves particles. Finally, the influence of precipitation phases and fabrication strategies on the tensile properties of the as-deposited samples was investigated. The failure modes of the tensile specimens were analyzed with fractography.

关键词： Pulsed plasma arc deposition Inconel 625 components Microstructure Mechanical properties

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Remanufacturing Shaping System Based on Pulsed Plasma Arc Welding

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稀有金属材料与工程 2012年第S1期41卷 152-155页

作者： Xu Fujia Xu Binshi lv yaohui Xiang, Wu Peng, He Liu Yuxin Harbin Inst Technol State Key Lab Adv Welding & Joining Harbin 150001 Peoples R China Acad Armored Forces Engn Natl Key Lab Remfg Beijing 100072 Peoples R China Dalian Maritime Univ Automat Res Ctr Dalian 116026 Peoples R China

Based on the pulsed plasma arc welding(PPAW),a rapid remanufacturing shaping system,including a structured light scanning reverse engineering(RE)system,a robot system and a PPAW source system have been *** new rapid remanufacturing shaping system can rapidly and accurately repair the worn parts with different damaged degrees and thus extend their life *** the present paper,the whole process of repairing worn parts is ***,the scanning model of a worn part is obtained by using RE system based on reconstructing *** with standard CAD model in the undamaged setting,the surface profile and the extent of damage area are ***,the weld repair path is designed by slicing the point cloud model of damage *** path consists of multilayer parallel lines that produce parallel overlapped weld beads which cover the damaged *** off-line programming techniques,the robot executable program as document format is transmitted to the robot controller for repairing worn ***,the weld repair experiments on worn steel plane plate and damaged column are performed to evaluate the remanufacturing system.

关键词： remanufacturing system pulsed plasma arc welding structured light scanning repair path

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Recent advances in anode materials for potassium-ion batteries:A review

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Nano Research 2021年第12期14卷 4442-4470页

作者： Lianbo Ma yaohui lv Junxiong Wu Chuan Xia Qi Kang Yizhou Zhang Hanfeng Liang Zhong Jin School of Materials Science and Engineering Anhui University of TechnologyMaanshan243002China Key Laboratory of Mesoscopic Chemistry of Ministry of Education(MOE) Jiangsu Key Laboratory of Advanced Organic MaterialsState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Shenzhen Research Institute of Nanjing University Shenzhen518063China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu610054China Department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong UniversityShanghai200240China Institute of Advanced Materials and Flexible Electronics(IAMFE) School of Chemistry and Materials SciencesNanjing University of Information Science&TechnologyNanjing210044China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen361005China

Potassium-ion batteries(PIBs)are appealing alternatives to conventional lithium-ion batteries(LIBs)because of their wide potential window,fast ionic conductivity in the electrolyte,and reduced ***,PIBs suffer from sluggish K+reaction kinetics in electrode materials,large volume expansion of electroactive materials,and the unstable solid electrolyte *** strategies,especially in terms of electrode design,have been proposed to address these *** this review,the recent progress on advanced anode materials of PIBs is systematically discussed,ranging from the design principles,and nanoscale fabrication and engineering to the structure-performance ***,the remaining limitations,potential solutions,and possible research directions for the development of PIBs towards practical applications are *** review will provide new insights into the lab development and real-world applications of PIBs.

关键词： potassium-ion batteries anode materials nanoscale engineering electrode design

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Study on the Formability of Iron-Based Powder Metal Materials in Plasma Arc Direct Metal Forming Process

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稀有金属材料与工程 2011年第S4期40卷 266-269页

作者： Xia Dan1,Xiang Yonghua2,Xu Binshi 1,lv yaohui 11Science and Technology on Remanufacturing Laboratory,Beijing 100072,China2Navy Logistics Technology and Equipment Institute of PLA,Beijing 100072,China Sci & Technol Remfg Lab Beijing 100072 Peoples R China Navy Logist Technol & Equipment Inst PLA Beijing 100072 Peoples R China

The specific Fe-based alloy for direct metal forming was designed and prepared under multi-layer cladding *** powder was designed for getting the better formability,toughness and *** experiment used KR6 robot and NW5000 digital power supply as the hardware *** and hardness of the layer formed by different powder were analyzed by using X-ray diffraction (XRD) and Transmission Electron Microscope (TEM).The result shows that thermal expansion coefficient correlated with processing formability is not *** of the layers is correlated to elements phase of the coatings was formed by γ(FeNi) and α(FeCrNi),and a little Cr23C6、Fe3Si and MoO2.

关键词： plasma arc direct metal forming iron-based powder

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基于等离子熔覆快速成形零件的组织与性能

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焊接学报 2010年第9期31卷 49-52页

作者：向永华徐滨士吕耀辉海军后勤技术装备研究所北京100072 装甲兵工程学院装备再制造技术国防科技重点实验室北京100072

为了采用微束等离子弧粉末熔覆快速成形技术,在低碳钢基板上进行了铁基合金粉末Fe313的直接金属成形试验.通过光学金相显微镜和扫描电镜观察分析了成形金属零件显微组织和形貌,并利用维氏硬度计测试了熔覆层的显微硬度.结果表明,成形件... 详细信息

为了采用微束等离子弧粉末熔覆快速成形技术,在低碳钢基板上进行了铁基合金粉末Fe313的直接金属成形试验.通过光学金相显微镜和扫描电镜观察分析了成形金属零件显微组织和形貌,并利用维氏硬度计测试了熔覆层的显微硬度.结果表明,成形件中部典型组织表现为岛状的M-A组元,层与层结合处可看到明显的组织分界,先成形层受到后成形层的热影响,会引起晶粒细化,成形件硬度沿高度呈U形分布,中间熔覆层由于后道焊缝的回火作用而有所软化,导致硬度降低.

关键词：快速成形微束等离子熔覆铁基合金显微组织

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Mechanical Property of Layer Deposited by Micro-Plasma Arc Welding on Worn Gear

Mechanical Property of Layer Deposited by Micro-Plasma Arc W...

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Fifth International Conference on Surface Engineering

作者： Cunlong Liu1 yaohui lv1 Binshi Xu1 Dan Xia1 1National Key Laboratory for Remanufacturing Academy of Armored Force Engineering Beijing China

Surface of gears that work continuously tends to be *** on worn gear can repair its worn surface,restore its precision,consolidate its surface property,and save ***-Plasma Arc Welding（microPAW） has low heat input and narrow heat-affected zone,and it has good properties of energy concentration and high energy ***,hardfacing by microPAW is an effective method to repair worn gear ***-Ni60（Ni,Cr,B,Si,Fe） Fe-based alloy powder has good weldability property,and welding layer deposited by KF-Ni60 has low friction coefficient and good property of wear resistance between metallic hard *** KF-Ni60 is a kind of good overlaying materials that can be applied to the welding process to repair the worn gear *** this research,the method of overlaying on worn gear using KF-Ni60 Fe-based alloy powder by microPAW and the mechanical property of deposition layer are *** metallurgical structure and the microscopic structure of heat-affected zone are analyzed by optical metalloscope and scanning electron microscope（SEM）.The elementary distribution of cross-section is measured by energy dispersive spectrometer（EDS）.The surface hardness and wear-resistant property of deposition layer are measured by tribology tester,nanotest platform and vickers hardness *** result indicates that the appearance of welding deposition layer is affected by welding current,powder feed rate and the relative velocity between the plasma torch and the *** deposition layer and the base metal bond well,and the surface of gear after repaired has good surface properties such as wear resistance,fatigue resistance and shock resistance.

关键词： micro-plasma arc welding deposition layer surface property

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Review Article Electrocatalysts in lithium-sulfur batteries

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Nano Research 2023年第4期16卷 4438-4467页

作者： Shanying Wang Ziwei Wang Fangzheng Chen Bo Peng Jie Xu Junzhe Li yaohui lv Qi Kang Ailin Xia Lianbo Ma Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials&Low-Carbon New Materials Research Center&School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243002China Department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong UniversityShanghai 200240China Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology(HKUST)Clear Water BayHong KongChina

Lithium-sulfur(Li-S)batteries with the merits of high theoretical capacity and high energy density have gained significant attention as the next-generation energy storage ***,the main pressing issues of sluggish reaction kinetics and severe shuttling of polysulfides hampered their practical *** overcome these obstacles,various strategies adopting high-efficient electrocatalysts have been explored to enable the rapid polysulfide conversions and thereby suppressing the polysulfide *** review first summarizes the recent progress on electrocatalysts involved in hosts,interlayers,and protective ***,these electrocatalysts in Li-S batteries are analyzed by listing representative works,from the viewpoints of design concepts,engineering strategies,working principles,and electrochemical ***,the remaining issues/challenges and future perspectives facing electrocatalysts are given and *** review may provide new guidance for the future construction of electrocatalysts and their further utilizations in high-performance Li-S batteries.

关键词： lithium-sulfur batteries slow reaction kinetics polysulfide shuttling electrocatalysts electrochemical energy storage

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强剩磁地区磁法勘探应用研究

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工程地球物理学报 2016年第6期13卷 758-764页

作者：曾杰邓耀辉吕天江贵州省有色金属和核工业地质勘查局物化探总队贵州都匀558000 贵州省有色金属和核工业地质勘查局七总队贵州贵阳550005 贵州省地矿局物化探院贵州贵阳550018

在剩磁较强的工区中采集的野外磁测数据包含了显著的剩磁效应,不仅影响了总磁化强度的大小,也影响了其方向。如果在剩余磁化效应比较强的区域进行磁测工作时不考虑剩余磁化强度的影响,会对资料的处理解释结果造成较大的影响。为证明此观... 详细信息

在剩磁较强的工区中采集的野外磁测数据包含了显著的剩磁效应,不仅影响了总磁化强度的大小,也影响了其方向。如果在剩余磁化效应比较强的区域进行磁测工作时不考虑剩余磁化强度的影响,会对资料的处理解释结果造成较大的影响。为证明此观点,本文通过模型试验计算,分析了剩余磁化效应对于磁异常曲线和平面等值线图的影响,得出了随着剩余磁化强度的增大,磁异常曲线畸变变越大的结果。此时在没有确定工区总场大小和方向的情况下,不宜采用化极方法处理数据。

关键词：剩磁效应化极磁化倾角

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