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Effects of Co and Nb on the Crack of Additive Manufacturing Nickel-Based Superalloys

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Acta Metallurgica Sinica(English Letters) 2024年第9期37卷 1601-1610页

作者： Kejie Tan jinli xie Hailong Qin Bin Xu Guichen Hou Jinguo Li Zhongnan Bi Ji Zhang Beijing Key Laboratory of Advanced High Temperature Materials Central Iron&Steel Research InstituteBeijing100081China Beijing GAONA Materials&Technology Co. LTDBeijing100081China Superalloys Division Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

Increasing the print quality is the critical requirement for the additive manufactured complex part of aero-engines of nickel-based superalloys.A study of the effects of Co and Nb on the crack is performed focusing on the selective laser melting(SLM)nickel-based *** this paper,the solvus temperature of γ',crack characteristics,microstructure,thermal expansion,and mechanical properties of SLM nickel-based superalloy are investigated by varying the content of Co and *** alloy with 15Co/0Nb shows the highest comprehensive *** increases the crack risk and thermal deformation,and then Co accelerates the stress ***,Co is an extremely important alloying element for improving the quality of SLM nickel-based ***,the crack growth kinetics and the strain difference are discussed to reveal the SLM crack regular that is affected by time or *** analysis work on the effect of alloying elements can obtain an effective foundational theory to guide the composition optimization of SLM nickel-based superalloys.

关键词： Nickel-based superalloys Selective laser melting Element effect Crack

热处理对增材制造TS5镍基高温合金组织与性能的影响

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金属热处理 2024年第4期49卷 116-122页

作者：谭科杰谢锦丽秦海龙徐斌董行毕中南张继钢铁研究总院有限公司高温合金新材料北京市重点实验室北京100081 北京钢研高纳科技股份有限公司北京100081 北京钢研高纳科技股份有限公司平度分公司山东青岛266736

采用选区激光熔化(Selective laser melting,SLM)技术制备TS5镍基高温合金,通过不同保温温度、升温速率和保温时间的热处理工艺,分析了热处理对SLM成形TS5合金的显微组织和力学性能的影响。结果表明,沉积态TS5合金裂纹占比0.07%,平均晶... 详细信息

采用选区激光熔化(Selective laser melting,SLM)技术制备TS5镍基高温合金,通过不同保温温度、升温速率和保温时间的热处理工艺,分析了热处理对SLM成形TS5合金的显微组织和力学性能的影响。结果表明,沉积态TS5合金裂纹占比0.07%,平均晶粒截面粒径为66.94μm,具有低的打印成形开裂倾向与稳定的成形组织。沉积态TS5合金以0.1℃/s升温至900℃时,γ′相在升温过程中析出。而较快的升温速率可以抑制TS5合金在升温过程中γ′相的析出,特别是当升温速率大于50℃/s时,γ′相的析出被完全抑制。在850℃下分别保温10、60、240 min时,γ′相体积分数分别为26.2%、37.7%和47.1%,析出量逐渐增加;γ′相尺寸分别为22.2、40.5、58.9 nm。拉伸测试显示,沉积态TS5合金随着热处理温度升高,抗拉强度逐步降低,650℃与750℃的屈服强度分别为873 MPa和768 MPa;850℃和950℃的拉伸过程出现脆断现象。电子背散射衍射(Electron back-scatter diffraction,EBSD)发现裂纹主要出现在大角度晶界处。综上所述,合理的快速升温配合短时保温有利于避免升温过程的相变内应力,有效提升晶界强度,对SLM成形TS5合金避免热处理过程的畸变开裂至关重要。

关键词：镍基高温合金选区激光熔化热处理组织性能裂纹

Application of Digital Analysis Technology in Refractory Petrographic Analysis

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China's Refractories 2014年第3期23卷 1-5页

作者： WANG Jiezeng xie jinli Ruitai Materials Technology Co. Ltd. China Building Material Test and Certification Center

Six specimens of fused cast AZS 33#material were taken as samples,and their chemical compositions and physical properties（ initial separating temperature o glass phase,corrosion amount in 24 h,glass phase seepage,and bulk density） were tested; low powered backscattered electron images of the samples（ three for each sample） were taken by a scanning electronic microscope with a reinforced backscattering probe. Then,firstly,the images were processed,and the phase compositions（relative contents of pores,matrix,alumina- zirconia eutectoid and primary baddeleyite） of the samples were obtained by counting. Secondly,the correlation coefficients of all parameters were calculated; indistinctive coefficients and unimportant variables were eliminated by F- test. Thirdly,the roadmap of the parameters was established and explained according to professiona knowledge.

关键词： refractories digital image petrographicanalysis mathematical statistics fused cast AZSmaterial

深大基坑边坡绿色装配式面层防护结构受力与变形分析

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城市轨道交通研究 2024年第8期27卷 211-216页

作者：钟立超蒙强罗贤民徐前卫韩宇峰蒋承志谢金利广西南宁机场综合交通枢纽建设有限公司南宁530048 同济大学交通运输工程学院上海201804

[目的]深大基坑开挖活动会破坏土体原始应力场的平衡状态而产生变形,采用GRF(绿色装配式)面层防护结构能在绿色环保、高效施工的前提下控制基坑变形,因此需对深大基坑边坡GRF面层防护结构的受力与变形性能进行深入研究。[方法]以南宁国... 详细信息

[目的]深大基坑开挖活动会破坏土体原始应力场的平衡状态而产生变形,采用GRF(绿色装配式)面层防护结构能在绿色环保、高效施工的前提下控制基坑变形,因此需对深大基坑边坡GRF面层防护结构的受力与变形性能进行深入研究。[方法]以南宁国际空港综合交通枢纽深大基坑工程为依托,采用有限元数值模拟与现场实测相结合的方法,研究基坑边坡顶部GRF面层防护结构,以及基坑内部桩间GRF面层防护结构的受力与变形规律。[结果及结论]随着基坑开挖深度的增大,基坑边坡顶部的最大水平位移出现位置逐渐向坡脚方向移动,最大水平位移为8.67 mm;采用GRF面层防护结构能有效提高基坑顶部边坡的稳定性,锚杆能将GRF面层所受的部分荷载传递至土层中,进而减小GRF面层的变形与受力;桩间距对土拱效应发挥的影响较大,本工程桩间距可提高至2.5 m左右,桩间土拱效应在桩顶下方7~8 m处最为明显。

关键词：深大基坑边坡绿色装配式面层防护结构受力变形

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Deep Learning Blockchain Integration Framework for Ureteropelvic Junction Obstruction Diagnosis Using Ultrasound Images

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Tsinghua Science and Technology 2024年第1期29卷 1-12页

作者： Yu Guan Pengceng Wen Jianqiang Li jinli Zhang Xianghui xie Faculty of Information Technology Beijing University of TechnologyBeijing 100124China Beijing Children’s Hospital Affiliated to Capital Medical University Beijing 100020China

UreteroPelvic Junction Obstruction(UPJO)is a common hydronephrosis disease in children that can result in an even progressive loss of renal *** is an economical,radiationless,noninvasive,and high noise preliminary diagnostic step for *** intelligence has been widely applied to medical fields and can greatly assist doctors'diagnostic *** demand for a highly secure network environment in transferring electronic medical data online,therefore,has led to the development of blockchain *** this study,we built and tested a framework that integrates a deep learning diagnosis model with blockchain *** diagnosis model is a combination of an attention-based pyramid semantic segmentation network and a discrete wavelet transformation-processed residual classification *** also compared the performance between benchmark models and our *** diagnosis model outperformed benchmarks on the segmentation task and classification task with MloU=87.93,MPA=93.52,and accuracy=91.77%.For the blockchain system,we applied the InterPlanetary File System protocol to build a secure and private sharing *** framework can automatically grade the severity of UPJO using ultrasound images,guarantee secure medical data sharing,assist in doctors'diagnostic ability,relieve patients'burden,and provide technical support for future federated learning and linkage of the Internet of Medical Things(loMT).

关键词： data mining image processing and computer vision machine learning medical information systems

Effects of Chemical Composition and Microstructure on Exudation of Fused Cast AZS Refractory Materials

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China's Refractories 2019年第2期28卷 23-26页

作者： YI Shuai DENG Lina ZENG Luju XUE Fei PAN Chuancai LIN Guowei LIU Yueqiang ZHANG Hang xie jinli China Building Material Test & Certification Group Co. Ltd. China Building Materials Academy

The fused cast alumina-zirconia-silica(AZS)refractory is an indispensable material of the glass melting furnace,because of its outstanding corrosion resistance and low pollution to glass *** exudation is one important index to evaluate the performance of fused cast AZS refractory *** order to study the effects of chemical composition and microstructure on the exudation of fused cast AZS refractory materials,three types of fused-cast AZS refractory bricks(AZS33#,AZS36#and AZS41#)were selected from several companies as the research object,and their composition,bulk density,apparent porosity,the value of exudation,static corrosion rate and microstructure were *** results show that the chemical composition,especially the content of SiO2 and Na2O,and the distribution of zirconia would greatly affect the content and viscosity of glass phase,thus affecting the glass *** work will provide technical reference for the development of low exudation AZS refractories.

关键词： fused cast alumina-zirconia-silica refractories chemical composition microstructure exudation

Static Corrosion Rates of Fused-cast AZS Refractory Materials by Molten Glass

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Journal of the Chinese Ceramic Society 2016年第4期3卷 177-182页

作者： LI Kunming SHI Xinyong XUE Fei xie jinli LIN Guowei PAN Chuancai LIU Yueqiang ZHANG Hang China Building Materials Academy China Building Material Test & Certification Group Co.Ltd. China Building Materials Academy State Key Laboratory of Green Building Materials

In order to investigate corrosive phenomena of fused-cast Al_2O_3-ZrO_2-SiO_2(AZS) refractory materials by molten glass,two types of fused-cast AZS refractory bricks were taken as the interests of the research to study static corrosion rates(mm/d) of the two type materials by molten soda-lime-silica glass at different temperatures(1400,1450 and 1500 *C) and for different isothermal periods(0.5,1.0 and 1.5 d).It was shown that static corrosion rate of each AZS material by molten glass at the triple point developed with raising temperature but slightly decreased with enhancing isothermal *** on chemical compositions,microstructures,and corrosive morphologies of AZS refractory materials,the relation between them and static corrosion rates of AZS refractory materials by molten glass was analyzed.

关键词： static corrosion rate fused-cast AZS refractory materials molten glass microstructure

差动行星轮系作为并联HEV转矩合成器的动力匹配研究及参数优化

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机械科学与技术 2010年第11期29卷 1553-1556,1560页

作者：谢进利张维强南京农业大学工学院南京210031

选用2K-H型差动行星轮系作为混合动力电动汽车的动力合成装置,在ADVISOR中建立了该动力合成装置的仿真模型。在ADVISOR原有的并联式混合动力汽车模型的基础上,通过修改部件模型建立了采用差动行星轮作为动力合成装置的整车模型。对所建... 详细信息

选用2K-H型差动行星轮系作为混合动力电动汽车的动力合成装置,在ADVISOR中建立了该动力合成装置的仿真模型。在ADVISOR原有的并联式混合动力汽车模型的基础上,通过修改部件模型建立了采用差动行星轮作为动力合成装置的整车模型。对所建立的车辆模型进行了动力匹配研究和动力系统参数优化计算。

关键词：差动行星轮系动力匹配参数优化 ADVISOR 混合动力汽车

高强度聚焦超声消融刀治疗子宫肌瘤的效果及对患者细胞免疫功能的影响

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医疗装备 2023年第12期36卷 100-102页

作者：谢金丽福建省三明市将乐县总医院福建三明353300

目的探讨高强度聚焦超声(HIFU)消融刀治疗子宫肌瘤的效果及对患者细胞免疫功能的影响。方法选择2019年7月至2022年5月在医院诊治的子宫肌瘤患者88例作为研究对象,随机将患者分为超声消融组(44例)与动脉栓塞组(44例)。超声消融组接受HIF... 详细信息

目的探讨高强度聚焦超声(HIFU)消融刀治疗子宫肌瘤的效果及对患者细胞免疫功能的影响。方法选择2019年7月至2022年5月在医院诊治的子宫肌瘤患者88例作为研究对象,随机将患者分为超声消融组(44例)与动脉栓塞组(44例)。超声消融组接受HIFU消融刀治疗,动脉栓塞组接受子宫动脉栓塞治疗,比较两组治疗效果、肌瘤体积、血清性激素含量及细胞免疫功能。结果治疗后3个月,超声消融组总有效率高于动脉栓塞组(P<0.05);治疗后3个月,两组肌瘤体积小于治疗前(P<0.05),且超声消融组肌瘤体积小于动脉栓塞组(P<0.05);治疗后3个月,两组血清促卵泡激素(FSH)、促黄体生成激素(LH)含量高于治疗前(P<0.05),且超声消融组血清FSH、LH含量高于动脉栓塞组(P<0.05);治疗后3个月,两组CD3^(+)T淋巴细胞占淋巴细胞的比例与CD4^(+)T淋巴细胞占淋巴细胞的比例高于治疗前(P<0.05),且超声消融组CD3^(+)T淋巴细胞占淋巴细胞的比例与CD4^(+)T淋巴细胞占淋巴细胞的比例高于动脉栓塞组(P<0.05)。结论HIFU消融刀治疗子宫肌瘤能提高总体治疗效果,缩小肌瘤体积,有利于患者性激素正常分泌,还可改善患者的细胞免疫功能。

关键词：高强度聚焦超声消融刀子宫肌瘤性激素细胞免疫肌瘤体积

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