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X射线超快成像原位表征激光增材制造过程研究进展

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中国有色金属学报 2024年第4期34卷 1405-1427页

作者：龚来凤帅三三李雅莉黎姗姗陈超越王江任忠鸣上海大学省部共建高品质特殊钢冶金与制备国家重点实验室上海200444 上海大学材料科学与工程学院上海200444 中国航发商用航空发动机制造有限责任公司上海201306

在增材制造过程中,熔池经历快速熔化、冷却、凝固的过程,其物理、化学、结构和应力等处于极端非平衡状态,容易导致孔隙、裂纹等缺陷产生,影响制件力学性能。同步辐射X射线具有高空间分辨率和时间分辨率,可以实现增材制造过程中熔池动力... 详细信息

在增材制造过程中,熔池经历快速熔化、冷却、凝固的过程,其物理、化学、结构和应力等处于极端非平衡状态,容易导致孔隙、裂纹等缺陷产生,影响制件力学性能。同步辐射X射线具有高空间分辨率和时间分辨率,可以实现增材制造过程中熔池动力学和缺陷演化的原位表征。本文综述了近年来激光增材制造原位实验平台的搭建,并从熔池结构演化、缺陷形成机理和成形工艺优化三个方面介绍了同步辐射X射线原位表征激光增材制造过程的研究进展。最后基于目前增材制造原位观察的局限性,从表征系统改进、原料多样化和计算修正等方面对未来研究进行了展望。

关键词：同步辐射X射线超快成像激光增材制造熔池结构演化缺陷形成原理

Recent advances in the synthesis and applications of furocoumarin derivatives

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中国化学快报:英文版 2023年第9期34卷 119-133页

作者： chaoyue chen Zheng-Bin Tang Zhichang Liu School of Chemistry and Chemical Engineering Jiangsu University of TechnologyChangzhou 213001China Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province Department of ChemistrySchool of Science and Research Center for Industries of the FutureWestlake Universityand Westlake Institute for Advanced StudyHangzhou 310030China

Furocoumarins are an important class of heterocyclic compounds with a fused tricyclic structure of coumarin and furan *** are commonly found in bioactive natural products and have a diverse range of biological and pharmaceutical properties,including cytotoxicity,photosensitivity,insecticidal,antibacterial,and antifungal activity,among *** elegant linear/angular tricyclic skeleton and superior pharmacological properties,make them ideal for building and developing advanced biological scaffolds for biomedical *** a result,the family of furocoumarins has been the focus of intensive research,and lots of encouraging progress have been achieved in recent *** review summarizes the most recent methods reported for the synthesis of the furocoumarin derivative family,along with their applications in medicinal chemistry covering from 2018 to 2022.

关键词： Furocoumarin Coumarin Furan Synthesis Pharmaceutical activity Applications

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激光粉末床熔融制备高强钢的研究进展与展望

钢铁 2024年第6期59卷 22-37页

作者：陈超越赵旺蒋丹青徐松哲王江任忠鸣上海大学材料科学与工程学院上海200444 上海大学省部共建高品质特殊钢冶金与制备国家重点实验室上海200444

高强度钢是一种具有高强度、高韧性等多种综合优异性能的钢材。根据合金元素含量不同,可以区分为低合金高强钢、中合金高强钢和高合金高强钢,并根据其不同的元素和组织强化机制,以不锈钢、高速钢、工具钢等钢种广泛应用于汽车、建筑、... 详细信息

高强度钢是一种具有高强度、高韧性等多种综合优异性能的钢材。根据合金元素含量不同,可以区分为低合金高强钢、中合金高强钢和高合金高强钢,并根据其不同的元素和组织强化机制,以不锈钢、高速钢、工具钢等钢种广泛应用于汽车、建筑、航天航空等领域。伴随着高强钢零件复杂结构的需求增大,以及传统零件生产流程繁杂冗长等弊端日益明显,能短流程直接成形复杂零件的生产制造技术正急需被研究应用。增材制造(additive manufacturing, AM)技术生产的金属具有更细小的晶粒、可控性更高的基体相、组织分布更加均匀、碳化物更细小且AM能直接成形复杂零件并大幅缩短工艺流程,有望满足更高的力学性能和日趋复杂的结构需求。从高强钢的基本特征入手,分析了传统制造下高强钢的微观组织、力学性能及强化机制。然后分析了增材制造技术特点,重点论述了激光粉末床熔融技术(laser powder bed fusion, L-PBF)生产高强钢的微观组织与力学性能,针对其内部的强化机理做出了系统的阐述,对传统制造高强钢的微观组织和力学性能较L-PBF制造的高强钢作了归纳与系统对比。其次关注了高强钢在增材制造领域的实际应用和部分研究成果,对高强钢增材制造的未来发展做出了展望,以期有助于高强钢在增材制造领域的进一步应用及工业化推广。

关键词：增材制造高强钢合金元素微观组织力学性能

Pineoblastoma:prognostic factors and survival outcomes in young children

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Chinese Medical Journal 2023年第3期136卷 367-369页

作者： Boran chen Yanjie Zhao chaoyue chen Department of Neurosurgery West China Hospital of Sichuan UniversityChengduSichuan 610041China

To the Editor:Pineoblastoma(PB)is a rare embryonal tumor of pineal parenchymal origin,which is a World Health Organization grade IV lesion frequently diagnosed in children and adolescents.A literature-based study revealed that patients aged≤5 years have a worse prognosis compared with patients aged>5 years(5-year survival rate:15%vs.57%,P<0.001).[1]Thus,younger children and older children with PB should be treated *** safe surgical resection followed by craniospinal irradiation and chemotherapy is recommended for the treatment of PB,and treatment protocols are highly age dependent.

关键词： chemotherapy prognosis younger

Application of Synchrotron X-Ray Imaging and Diffraction in Additive Manufacturing:A Review

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Acta Metallurgica Sinica(English Letters) 2022年第1期35卷 25-48页

作者： Naying An Sansan Shuai Tao Hu chaoyue chen Jiang Wang Zhongming Ren State Key Laboratory of Advanced Special Steels School of Materials Science and EngineeringShanghai UniversityShanghai200444China

Additive manufacturing(AM)is a rapid prototyping technology based on the idea of discrete accumulation which off ers an advantage of economically fabricating a component with complex geometries in a rapid design-to-manufacture ***,various internal defects,such as balling,cracks,residual stress and porosity,are inevitably occurred during AM due to the complexity of laser/electron beam-powder interaction,rapid melting and solidification process,and microstructure *** existence of porosity defects can potentially deteriorate the mechanical properties of selective laser melting(SLM)components,such as material stiff ness,hardness,tensile strength,and fatigue resistance *** X-ray imaging and diffraction are important non-destructive means to elaborately characterize the internal defect characteristics and mechanical properties of AM *** paper presents a review on the application of synchrotron X-ray in identifying and verifying the quality and requirement of AM ***,microstructures and mechanical properties of printed components characterized by synchrotron X-ray imaging and diffraction are summarized in this ***,this paper also elaborates on the online characterization of the evolution of the microstructure during AM using synchrotron X-ray imaging,and introduces the method for measuring AM stress by X-ray diffraction(XRD).Finally,the future application of synchrotron X-ray characterization in the AM is prospected.

关键词： Additive manufacturing Synchrotron X-ray imaging X-ray diffraction Defect formation Mechanical properties Residual stress

面向单晶高温合金叶片的激光增材制造修复研究进展

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精密成形工程 2024年第10期16卷 61-72页

作者：张兆裕陈超越徐松哲王江任忠鸣上海大学材料科学与工程学院省部共建高品质特殊钢冶金与制备国家重点实验室上海200444

镍基单晶高温合金因其卓越的高温性能,成为航空航天发动机及燃气轮机涡轮叶片的关键材料。复杂的服役环境常导致叶片损伤,但传统修复方法难以满足其对微观组织和力学性能的严格要求。激光增材制造技术作为一种先进的修复方法,能够在较... 详细信息

镍基单晶高温合金因其卓越的高温性能,成为航空航天发动机及燃气轮机涡轮叶片的关键材料。复杂的服役环境常导致叶片损伤,但传统修复方法难以满足其对微观组织和力学性能的严格要求。激光增材制造技术作为一种先进的修复方法,能够在较小的热影响区内实现材料的高精度修复,展现出显著的技术优势。然而,激光增材制造技术修复单晶叶片仍面临如何保持单晶完整性、控制冶金缺陷、优化狭窄工艺窗口等问题。此外,激光增材制造修复后热处理制度仍不完善,热处理后产生的再结晶等缺陷会严重影响单晶高温合金叶片的持久、蠕变等力学性能。本文综述了激光增材制造修复镍基单晶高温合金叶片的研究进展,重点探讨了修复过程中裂纹、杂晶缺陷的控制,梳理了对修复后热处理制度的探索历程并总结了激光增材制造镍基单晶高温合金力学性能的相关研究。最后对未来研究方向和发展趋势进行了展望。

关键词：激光增材制造镍基单晶高温合金损伤修复涡轮叶片热处理

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静磁场下电子束运动行为仿真

中国有色金属学报 2024年第7期34卷 2343-2355页

作者：田智睿付维达郝龙张小新蒋丹青胡涛陈超越余建波谭毅任忠鸣无省部共建高品质特殊钢冶金与制备国家重点实验室上海200444 上海市钢铁冶金新技术开发应用重点实验室上海200444 上海大学材料科学与工程学院上海200444 上海市集成电路与新型显示材料工程研究中心上海200444 大连理工大学材料科学与工程学院大连116024

电子束具有能量集中、能量转化效率高等特点,广泛用于金属精炼、增材制造等金属加工领域。在电子束熔炼过程中引入外磁场,可调控熔体流动与凝固组织,改善材料性能,但磁场会导致电子束偏转,造成熔区偏移。针对此问题,本研究基于COMSOL仿... 详细信息

电子束具有能量集中、能量转化效率高等特点,广泛用于金属精炼、增材制造等金属加工领域。在电子束熔炼过程中引入外磁场,可调控熔体流动与凝固组织,改善材料性能,但磁场会导致电子束偏转,造成熔区偏移。针对此问题,本研究基于COMSOL仿真软件对静磁场下电子与电子束在不同外加磁场强度、发射角、扫描角及发射距离参数下的运动行为进行建模与仿真分析。结果表明:磁场下电子束与单电子的运动行为相似;在一定外加磁场下实现电子束熔炼需满足一定的临界发射角和扫描角条件,如在背景磁场为0.15 T时,发射角需小于35°,且当发射角为0°时,扫描角介于−3.5°~+3.5°之间;磁场越强,电子(束)偏转越剧烈,其临界条件范围越窄;磁场对电子(束)具有筛选、聚焦及约束作用,在满足临界发射角和扫描角条件下任意发射距离的电子(束)均能进入坩埚。本研究可为磁场辅助电子束熔炼及其他相关技术的开发提供指导。

关键词：电子束熔炼磁场带电粒子运动数值模拟

In-situ observation of solid-liquid interface transition during directional solidification of Al-Zn alloy via X-ray imaging

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Journal of Materials Science & Technology 2020年第4期39卷 113-123页

作者： Yuanhao Dong Sansan Shuai Tianxiang Zheng Jiawei Cao chaoyue chen Jiang Wang Zhongming Ren State Key Laboratory of Advanced Special Steel School of Materials Science and EngineeringShanghai UniversityShanghai 200444China

The morphological instability of solid/liquid(S/L)interface during solidification will result in different patterns of *** this study,two dimension(2 D)and three dimension(3 D)in-situ observation of solid/liquid interfacial morphology transition in Al-Zn alloy during directional solidification were performed via X-ray *** a condition of increasing temperature gradient(G),the interface transition from dendritic pattern to cellular pattern,and then to planar growth with perturbation was *** effect of solidification parameter(the ratio of temperature gradient and growth velocity(v),G/v)on morphological instabilities was investigated and the experimental results were compared to classical"constitutional supercooling"*** results indicate that 2 D and 3 D evolution process of S/L interface morphology under the same thermal condition are *** seems that the S/L interface in 2 D observation is easier to achieve planar growth than that in 3 D,implying higher S/L interface stability in 2 D thin plate *** can be explained as the restricted liquid flow under 2 D solidification which is beneficial to S/L interface *** in-situ observation in present study can provide coherent dataset for microstructural formation investigation and related model validation during solidification.

关键词： Al-Zn alloy Directional solidification Solid/liquid interface instability In-situ observation X-ray imaging

Revealing the Diversity of Dendritic Morphology Evolution During Solidification of Magnesium Alloys using Synchrotron X-ray Imaging:A Review

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Acta Metallurgica Sinica(English Letters) 2022年第2期35卷 177-200页

作者： Yanan Wang Sansan Shuai chenglin Huang Tao Jing chaoyue chen Tao Hu Jiang Wang Zhongming Ren State Key Laboratory of Advanced Special Steels School of Materials Science and EngineeringShanghai UniversityShanghai 200444China School of Materials Tsinghua UniversityBeijing 10084China

In this paper,the diversity of complicated dendrite microstructure and its evolution behavior during solidification in different magnesium alloys under various processing conditions were illustrated using synchrotron X-ray imaging technique.A variety of dendritic morphologies and branching structures were revealed,i.e.,sixfold plate-like symmetric structure in Mg-Al-based structure,12-branch structure in Mg-Zn-based alloys and 18-branch structure in Mg-Sn-and Mg-Ca-based alloys as well as seaweed like hyper-branched structure in Mg-38wt%Zn *** addition,a dendrite morphology and orientation transition with increasing addition of Zn content were also observed in Mg-Zn alloy,with dendrite growth pattern transform from anisotropy(low Zn addition)with sixfold symmetric snow-flake structure to relative isotropy(intermediate Zn addition)where seaweed morphology presented and then back to anisotropy(high Zn addition)when only 12 branches with preferredorientations were *** phase-field model representing the typical dendritic morphologies and branching structures under various conditions was also depicted and ***,the two-dimensional(2D)real-time dendrite growth dynamics in different Mg-based alloys captured using synchrotron X-ray radiography for unveiling the originate of theα-Mg dendrite was *** this,the four-dimensional(3D+time)synchrotron X-ray tomographic in situ observation of dendritic morphology evolution indicating the formation mechanism of the diverse dendritic morphology during Mg-Sn-and Mg-Zn-based alloys was also ***,the future study on exploring the complicated dendritic morphologies and their origination during solidification of Mg-based alloys is prospected.

关键词： Magnesium alloys Solidification microstructure Dendritic morphology Synchrotron X-ray imaging Growth pattern