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Alloy design for laser powder bed fusion additive manufacturing:a critical review

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International Journal of Extreme Manufacturing 2024年第2期6卷 29-63页

作者： Zhuangzhuang Liu qihang Zhou Xiaokang liang Xiebin Wang Guichuan Li Kim Vanmeensel Jianxin Xie Key Laboratory for Advanced Materials Processing(MOE) Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083People’s Republic of China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China Capital Aerospace Machinery Corporation Limited Beijing 100076People’s Republic of China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJingshi Road 17923Jinan 250061People’s Republic of China Department of Materials Engineering KU LeuvenLeuven 3001Belgium

Metal additive manufacturing(AM)has been extensively studied in recent *** the significant progress achieved in manufacturing complex shapes and structures,challenges such as severe cracking when using existing alloys for laser powder bed fusion(L-PBF)AM have *** challenges arise because commercial alloys are primarily designed for conventional casting or forging processes,overlooking the fast cooling rates,steep temperature gradients and multiple thermal cycles of *** address this,there is an urgent need to develop novel alloys specifically tailored for L-PBF *** review provides a comprehensive summary of the strategies employed in alloy design for *** aims to guide future research on designing novel alloys dedicated to L-PBF instead of adapting existing *** review begins by discussing the features of the L-PBF processes,focusing on rapid solidification and intrinsic heat ***,the printability of the four main existing alloys(Fe-,Ni-,Al-and Ti-based alloys)is critically assessed,with a comparison of their conventional *** was found that the weldability criteria are not always applicable in estimating ***,the review presents recent advances in alloy development and associated strategies,categorizing them into crack mitigation-oriented,microstructure manipulation-oriented and machine learning-assisted ***,an outlook and suggestions are given to highlight the issues that need to be addressed in future work.

关键词： laser powder bed fusion alloy design printability crack mitigation

Realization of homogeneous dielectric barrier discharge in atmospheric pressure argon and the effect of beads on its characteristics

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Plasma Science and Technology 2023年第5期25卷 77-84页

作者：冉俊霞张雪雪张宇吴凯玥赵娜何兴然代秀红梁启航李雪辰 College of Physics Science and Technology Hebei UniversityBaoding 071002People’s Republic of China Institute of Life Science and Green Development Hebei UniversityBaoding 071002People’s Republic of China School of Mathematics and Physics Handan UniversityBaoding 071002People’s Republic of China

This paper describes the realization of a homogeneous dielectric barrier discharge(DBD)in argon at atmospheric *** effect of the morphology of the dielectric surface(especially the dielectric surface covered by hollow ceramic beads(99%Al_(2)O_(3))with different diameters)on discharge is *** different dielectrics,the argon DBD presents two discharge modes:a filamentary mode and a homogeneous *** photography shows that the filamentary mode operates in a streamer discharge,and the homogeneous mode operates in a Townsend discharge *** is found that a homogeneous discharge can be generated within a certain voltage *** voltage amplitude range decreases,and the breakdown voltage increases with the increase in the mean diameter of the ceramic *** of the total current and optical emission signal present stochastic pulses per half voltage cycle for the filamentary mode,whereas there is one single hump per half voltage cycle for the homogeneous *** the homogeneous mode,the intensity of the optical emission decreases with the mean diameter of the ceramic *** optical emission spectrum is mainly composed of atomic lines of argon and the second positive system of molecular *** reveals that the electron density decreases with the increasing mean diameter of the ceramic *** vibrational temperature increases with the increasing mean diameter of the ceramic *** is believed that a large number of microdischarges are formed,and smaller ceramic beads have a larger activation surface area and more point *** liberated in the shallow well and electrons generated from microdischarges can increase the secondary electron emission coefficient of the cathode and provide initial electrons for discharge ***,the breakdown electric field is reduced,which contributes to easier generation of homogeneous *** is confirmed by the simulation results.

关键词： dielectric barrier discharge homogeneous discharge Townsend discharge microdischarge secondary electron emission

基于PTP1B探讨芪术抗癌方调控同、异源黏附串扰抑制结肠癌转移的作用机制

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北京中医药大学学报 2024年第2期47卷 249-259页

作者：万林鹭梁研孙若岚梁众擎殷启航王旭赵凡唐德才南京中医药大学中医学院·中西医结合学院南京210023

目的探讨芪术抗癌方调控同、异源黏附串扰关键蛋白蛋白酪氨酸磷酸酶1B(PTP1B)抑制结肠癌转移的作用机制。方法制备空白血清及芪术抗癌方含药血清。采用液质联用技术分析芪术抗癌方含药血清的有效化学成分。通过质粒转染,体外构建HCT116... 详细信息

目的探讨芪术抗癌方调控同、异源黏附串扰关键蛋白蛋白酪氨酸磷酸酶1B(PTP1B)抑制结肠癌转移的作用机制。方法制备空白血清及芪术抗癌方含药血清。采用液质联用技术分析芪术抗癌方含药血清的有效化学成分。通过质粒转染,体外构建HCT116细胞的PTP1B过表达模型(OE⁃PTP1B HCT116)。CCK-8法检测OE⁃PTP1B HCT116存活率后选择20%空白血清及5%、10%、20%芪术抗癌方含药血清。采用划痕实验、transwell实验和黏附实验分别检测细胞迁移、侵袭及黏附情况,采用蛋白质印迹法检测PTP1B、黏着斑蛋白(vinculin)、E-钙黏蛋白(E⁃cadherin)、整合素αν亚单位(integrinανsubunit)、整合素β3亚单位(integrinβ3 subunit)蛋白表达水平。结果液质联用分析得到芪术抗癌方含药血清中12个主要有效化学成分,含量最高的是毛蕊异黄酮苷。OE⁃PTP1B HCT116细胞PTP1B、vinculin蛋白表达升高(均P<0.05),表明模型构建成功。与空白血清组比较,不同体积分数的芪术抗癌方含药血清组存活率降低(均P<0.05)。与空白血清组比较,10%、20%芪术抗癌方含药血清组伤口愈合率下降,各芪术抗癌方含药血清组侵袭细胞数均减少,各芪术抗癌方含药血清组黏附在细胞上的HCT116细胞数量均增加、黏附在基质凝胶上的HCT116细胞数量减少;与空白血清组比较,20%芪术抗癌方含药血清组E⁃cadherin蛋白表达水平升高(均P<0.05),PTP1B、vinculin、integrinανsubunit、integrinβ3 subunit蛋白表达降低。结论芪术抗癌方抑制结肠癌转移的作用机制可能与通过调控以PTP1B为核心介导的同、异源黏附串扰有关。

关键词：芪术抗癌方结肠癌蛋白酪氨酸磷酸酶1B 同源黏附异源黏附大鼠

“双碳”目标下绿色低碳理念与地理教学融合探索

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基础教育研究 2023年第8期 58-60,64页

作者：邹茹晶耿英瑞梁启航陈璇山东师范大学地理与环境学院济南250358 山东省济南中学济南250001 山东日照港第一小学日照276826

文章采用问卷调查法分析当前高中学生绿色低碳意识及接受绿色低碳教育现状,探讨在高中地理教学中开展绿色低碳教育的优势。在此基础上,以人教版高中地理教材必修第二册为例,深入挖掘绿色低碳要素,探索绿色低碳理念与高中地理课堂融合的... 详细信息

文章采用问卷调查法分析当前高中学生绿色低碳意识及接受绿色低碳教育现状,探讨在高中地理教学中开展绿色低碳教育的优势。在此基础上,以人教版高中地理教材必修第二册为例,深入挖掘绿色低碳要素,探索绿色低碳理念与高中地理课堂融合的路径,以期为一线教师提供借鉴。

关键词：高中地理绿色低碳理念教学融合

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基于“传舍”理论治疗结直肠癌转移“四则”

中华中医药杂志 2024年第6期39卷 2890-2894页

作者：梁众擎尹刚万林鹭殷启航王旭唐德才南京中医药大学针药结合实验室南京210023 南京中医药大学针灸推拿学院·养生康复学院南京210023 南京中医药大学中医学院南京210023

结直肠癌恶性度高,生存率低,中医药在转移后期及术后的辅助治疗中多起主导作用,不仅有效延长患者生存时间,还可提高患者生活质量。唐德才教授基于《黄帝内经》“传舍”理论及临床经验,提出治疗结直肠癌转移四法,即重调脾胃、补气为先,... 详细信息

结直肠癌恶性度高,生存率低,中医药在转移后期及术后的辅助治疗中多起主导作用,不仅有效延长患者生存时间,还可提高患者生活质量。唐德才教授基于《黄帝内经》“传舍”理论及临床经验,提出治疗结直肠癌转移四法,即重调脾胃、补气为先,调节情志、活血为纲,引药归经、解毒为使,清下焦湿热、肠胃兼顾,合以“补泻兼施、收散相宜、气血共调、正邪兼顾”之“四则”,以直捣病位,破除瘀血癌毒,恢复大肠传导功能,在联合放化疗药物治疗时达到抗敏、增效、减毒、预防转移、改善症状之效。在多年临证治疗结直肠癌转移屡获奇验。

关键词：肿瘤传舍结直肠癌转移四法四则

存量规划视角下城市更新发展策略研究——以山东省日照市为例

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城市建筑 2022年第13期19卷 116-119页

作者：梁启航日照市城镇化建设服务中心

在“十四五”规划期间,中国城市规划处于由增量扩张向存量优化转变的重大历史时期,同时在国土空间规划改革的大背景下,城市更新将成为存量规划时期城市建设发展和国土资源用途管制的主阵地。文章结合山东省日照市贯彻新发展理念、加快... 详细信息

在“十四五”规划期间,中国城市规划处于由增量扩张向存量优化转变的重大历史时期,同时在国土空间规划改革的大背景下,城市更新将成为存量规划时期城市建设发展和国土资源用途管制的主阵地。文章结合山东省日照市贯彻新发展理念、加快建设精致城市和提升城市功能品质的多项措施,研究了城市更新在保护生态文明、用好存量空间、推进区域开发方面的发展策略。

关键词：存量规划城市更新城镇化可持续发展

走进品质城市新时代——城市更新行动下的老旧小区改造探索

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城市建筑 2022年第14期19卷 49-51,81页

作者：梁启航日照市城镇化建设服务中心

加快推进城市更新,改造提升老旧小区存量片区是“十四五”规划在转变城市发展方式上的重要任务目标,与此同时,百姓对老旧小区改造更新的呼声也日益强烈,但中国目前城市老旧小区更新改造的实施体系尚不成熟,存在城市老旧小区更新参与主... 详细信息

加快推进城市更新,改造提升老旧小区存量片区是“十四五”规划在转变城市发展方式上的重要任务目标,与此同时,百姓对老旧小区改造更新的呼声也日益强烈,但中国目前城市老旧小区更新改造的实施体系尚不成熟,存在城市老旧小区更新参与主体不明确、资金来源单一、改造方式简单粗暴等问题。为解决以上问题,本文从城市更新行动的视角出发,统筹兼顾品质城市的共建主体,坚持“以人为本”的思想,通过剖析城市更新现状和学术理论,提出以构建政府为主,以多主体协同共建、拓宽融资渠道为资金来源,以“有机更新”代替大拆大建的老旧小区改造探索。

关键词：有机更新城市品质老旧小区社区改造空间治理

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碳中和愿景下林业碳汇经济价值评估及效率测算

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中南林业科技大学学报（社会科学版） 2024年第1期18卷 71-81页

作者：张亚连张启航梁旭文中南林业科技大学商学院湖南长沙410004

林业碳汇作为成本最低的碳吸收手段,是实现碳中和的重要途径。基于2008—2021年31个省级行政区的数据,估算了林业碳汇的经济价值,并将其纳入当前的林业经济核算体系中,构建了以林业碳汇价值为正外部性产出的DEA-Malmquist效率分析模型... 详细信息

林业碳汇作为成本最低的碳吸收手段,是实现碳中和的重要途径。基于2008—2021年31个省级行政区的数据,估算了林业碳汇的经济价值,并将其纳入当前的林业经济核算体系中,构建了以林业碳汇价值为正外部性产出的DEA-Malmquist效率分析模型。研究结果表明:总体上林业碳汇的经济价值较高,但区域间差异较大;2008—2018年,四大林区林业碳汇经济价值的排序为西南林区>东北林区>南方林区>北方林区,但在2021年南方林区反超东北林区,位居第二;林业碳汇效率呈现上升趋势,年增长速度达到31.9%,增速较高,在近三年来尤为突出;四大林区的林业碳汇效率的排序为南方林区>北方林区>西南林区>东北林区,技术进步效率为林业碳汇效率作出了巨大贡献,分时期来看,四大林区的Malmquist指数均呈现“U”型变动趋势。研究结果可为区域固碳增汇与可持续发展提供重要参考。

关键词：碳中和林业碳汇经济价值碳汇效率

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One step hot-pressing method for hybrid Li metal anode of solid-state lithium metal batteries

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Journal of Materials Science & Technology 2023年第22期153卷 32-40页

作者： Kaiming Wang Yifei Chen liang Zhang qihang Zhang Zhi Cheng Yining Su Fei Shen Xiaogang Han State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi’an Jiaotong UniversityXi’an 710049China School of Future Technology Xi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Smart Grid of Shaanxi Province Xi’anXi’an 710049China National Innovation Platform(Center)for Industry-Education Integration of Energy Storage Technology Xi’an 710049China

Safety issues induced by infinite anode volume change and uncontrolled lithium(Li)dendrite growth have become the biggest obstacle to the practical application of Li metal *** addition,the tra-ditional rolling method makes it difficult to manufacture thin Li foil with high mechanical strength and low Li ***,a three-dimensional(3D)lithophilic carbon paper/copper(Cu)current collector hybrid anode with ultra-low Li metal content is prepared by a hot-pressing *** highly re-versible and stable lithiophilic layer LiC_(x) formed in situ by heating/pressing treatment provides abun-dant nucleation sites and reduces the Li nucleation overpotential,thereby effectively suppressing Li den-drite ***,the volume change and pulverization problems of Li metal anode during depo-sition/stripping also can be accommodated by the 3D *** optimization effect has been directly confirmed by in-situ optical and ex-situ scanning electron microscope ***,highly sta-ble performance(158.4 mA h g^(-1) at 2 C after 200 cycles with a capacity retention of 95.24%)in Li@LCP-Cu||NCM811 coin cell can be ***,the solid-state battery assembled with the hybrid anode,poly(vinylidene fluoride)(PVDF)-based polymer electrolyte and polyethylene oxide(PEO)interface functional layer also exhibits the best electrochemical and safety performance,which also proves that the Li@LCP-Cu anode has great potential for application in solid-state batteries.

关键词： Hot-pressing Hybrid anode Lithiophilic layer licx Li dendrite Solid-state batteries