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Recent innovations in laser additive manufacturing of titanium alloys

International Journal of Extreme Manufacturing 2024年第3期6卷 2-37页

作者： jinlong su Fulin Jiang Jie Teng Lequn Chen Ming Yan Guillermo Requena Lai-Chang Zhang Y Morris Wang Ilya V Okulov Hongmei Zhu Chaolin Tan College of Materials Science and Engineering Hunan UniversityChangsha 410082People’s Republic of China Singapore Institute of Manufacturing Technology(SIM Tech) Agency for ScienceTechnology and Research(A∗STAR)5 Cleantech LoopSingapore 636732Singapore Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Institute of Materials Research German Aerospace Center(DLR)Linder Höhe51147 CologneGermany Centre for Advanced Materials and Manufacturing Edith Cowan University270 Joondalup DriveJoondalupPerthWestern Australia 6027Australia Department of Materials Science and Engineering University of CaliforniaLos AngelesCA 900095United States of America Leibniz Institute for Materials Engineering-IWT Badgasteiner Str.328359 BremenGermany Faculty of Production Engineering University of BremenBadgasteiner Str.128359 BremenGermany Key Laboratory of Hunan Province of Equipment Safety Service Technology under Extreme Environment University of South ChinaHengyangPeople’s Republic of China RWTH Aachen University Metallic Structures and Materials Systems for Aerospace EngineeringD-52062 AachenGermany

Titanium(Ti)alloys are widely used in high-tech fields like aerospace and biomedical *** additive manufacturing(LAM),as an innovative technology,is the key driver for the development of Ti *** the significant advancements in LAM of Ti alloys,there remain challenges that need further research and development *** recap the potential of LAM high-performance Ti alloy,this article systematically reviews LAM Ti alloys with up-to-date information on process,materials,and *** feasible solutions to advance LAM Ti alloys are reviewed,including intelligent process parameters optimization,LAM process innovation with auxiliary fields and novel Ti alloys customization for *** auxiliary energy fields(***,acoustic,mechanical deformation and magnetic fields)can affect the melt pool dynamics and solidification behaviour during LAM of Ti alloys,altering microstructures and mechanical *** kinds of novel Ti alloys customized for LAM,like peritecticα-Ti,eutectoid(α+β)-Ti,hybrid(α+β)-Ti,isomorphousβ-Ti and eutecticβ-Ti alloys are reviewed in ***,machine learning in accelerating the LAM process optimization and new materials development is also *** review summarizes the material properties and performance envelops and benchmarks the research achievements in LAM of Ti *** addition,the perspectives and further trends in LAM of Ti alloys are also highlighted.

关键词： additive manufacturing titanium alloys auxiliary field machine learning aerospace materials lightweight materials novel alloys

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镀铜/镍烧结钕铁硼永磁体与DP1180钢钎焊接头的组织与性能

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稀有金属材料与工程 2024年第2期53卷 365-370页

作者：苏金龙罗萃阮野邱小明邢飞吉林大学汽车材料教育部重点实验室吉林长春130022 吉林大学深圳研究院广东深圳518057 上海航天控制技术研究所上海201109

采用Zn-6Sn-5Bi钎料对镀Cu/Ni的烧结Nd Fe B永磁体和DP1180钢进行钎焊连接,对比分析了2种镀层条件下钎焊接头的微观组织和力学性能。结果表明,对于镀Cu的烧结Nd Fe B永磁体和DP1180钢的钎焊接头,Cu在钎料中扩散并与Zn、Fe反应生成脆性... 详细信息

采用Zn-6Sn-5Bi钎料对镀Cu/Ni的烧结Nd Fe B永磁体和DP1180钢进行钎焊连接,对比分析了2种镀层条件下钎焊接头的微观组织和力学性能。结果表明,对于镀Cu的烧结Nd Fe B永磁体和DP1180钢的钎焊接头,Cu在钎料中扩散并与Zn、Fe反应生成脆性金属间化合物,导致钎缝中出现裂纹和孔洞。与无镀层时的烧结Nd Fe B永磁体和DP1180钢的钎焊接头相比,接头的剪切强度由61.9 MPa降低至52.3 MPa;对于镀Ni的烧结Nd Fe B永磁体和DP1180钢的钎焊接头,Ni集中分布在Nd Fe B一侧的界面处,并且由于Sn和Bi的扩散形成了不同的扩散层,其剪切强度提高至78.1 MPa。

关键词：烧结NdFeB永磁体金属镀层钎焊接头微观组织剪切强度

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Recent progress in graphene-reinforced aluminum matrix composites

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Frontiers of Materials Science 2021年第1期15卷 79-97页

作者： jinlong su Jie TENG College of Materials Science and Engineering Hunan UniversityChangsha 410082China

Recent years witnessed a growing research interest in graphene-reinforced aluminum matrix composites(GRAMCs).Compared with conventionalreinforcements of aluminum matrix composites(AMCs),graphene possesses manyattractive characteristics such as extremely high strength and modulus,unique self-lubricating property,high thermal conductivity(TC)and electrical conductivity(EC),andlow coefficient of thermal expansion(CTE).A lot of studies have demonstrated that theincorporation of graphene into Al or Al alloy can effectively enhance mechanical andphysical properties of the Al *** purpose of this work is aimed to trace recentdevelopment of ***,this paper covers a brief overview of fabricationmethods of ***,mechanical,tribological,thermal and electrical properties ofrecently developed GRAMCs are presented and ***,challenges andcorresponding solutions related to GRAMCs are reviewed.

关键词： graphene aluminum metal matrix composite mechanical properties tribological properties

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Corrosion–wear behavior of a biocompatible magnesium matrix composite in simulated body fluid

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Friction 2022年第1期10卷 31-43页

作者： jinlong su Jie TENG Zili XU Yuan LI College of Materials Science and Engineering Hunan UniversityChangsha 410082China The First Affiliated Hospital Hunan Normal UniversityChangsha 410006China

Magnesium matrix composites are a new generation of biocompatible implant materials,but they will inevitably undergo simultaneous wear and corrosion in the human *** this study,hydroxyapatite(Ca10(PO4)6(OH)2,HA)is used in a magnesium matrix composite to study its effects on the corrosion–wear *** samples(a magnesium alloy composed of Mg,Zn,and Zr(ZK60)alloy and ZK60/10HA composite)were fabricated using the powder metallurgy(PM)*** corrosion–wear behavior was investigated using the sliding wear test in a simulated body fluid(SBF).At all the sliding velocities tested,the corrosion–wear resistance of ZK60/10HA was superior to *** a sliding velocity of 942.5 mm/min,ZK60/10HA demonstrated a 42%improvement in corrosion–wear resistance compared to *** ZK60,the main wear mechanism under dry conditions was abrasion,while the wear mechanisms in the SBF were abrasion and *** ZK60/10HA,the wear mechanisms under dry conditions were abrasion and delamination,while in SBF they were mainly abrasion and corrosion,accompanied by slight *** results indicated that HA particles can be used as an effective corrosion–wear inhibitor in biocompatible magnesium matrix composites.

关键词： wear corrosion alloy

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Revealing the decomposition mechanisms of dislocations and metastableα’phase and their effects on mechanical properties in a Ti-6Al-4V alloy

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Journal of Materials Science & Technology 2022年第12期107卷 136-148页

作者： jinlong su Xiankun Ji Jin Liu Jie Teng Fulin Jiang Dingfa Fu Hui Zhang College of Materials Science and Engineering Hunan UniversityChangsha 410082China AECC Hunan Aviation Powerplant Research Institute Zhuzhou 412002China

The metastableα’phase and dislocation characteristics(e.g.,density and constituents)are of vital importance for the mechanical responses of(α+β)titanium *** this work,to reveal the in-depth decomposition mechanisms of dislocations and metastableα’and their influences on mechanical properties in a Ti-6Al-4V(α+β)alloy,the thermal stability of different microstructures tailored by various cooling approaches were investigated utilizing scanning electron microscope,electron backscattered diffraction,transmission electron microscope and X-ray diffraction line profile *** results showed that the initial characteristics ofα’andαlaths and dislocation density were influenced by the cooling methods *** thermal stability of Ti-6Al-4V alloy increased with decreasing cooling *** improvement in thermal stability can be ascribed by the decrement in dislocations,partitioning of the alloying elements and grain orientations variation of theα’lath andα*** is also found that the plastic strain accommodation ofβ→α’transformation was dominated by *** stabilization annealing treatments,the,and dislocations simultaneously *** decomposition of dislocations and metastableα’phase during various stabilization annealing and the particular twins and stacking faults microstructures formed during quenching have a great influence on the properties of the studied Ti-6Al-4V alloy.

关键词： Titanium alloy Heat treatment Microstructure Mechanical properties Dislocation

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Effect of quenching residual stress on precipitation behaviour of 7085 aluminium alloy

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Journal of Materials Science & Technology 2023年第1期132卷 154-165页

作者： Jin Liu Zhiyong Du jinlong su Jie Tang Fulin Jiang Dingfa Fu Jie Teng Hui Zhang College of Materials Science and Engineering Hunan UniversityChangsha 410082China

The quenching-induced residual stress in ultrahigh strength Al-Zn-Mg-Cu alloys has a great influence on their precipitation behaviour in subsequent heat treatment and the properties of the final *** the present work,the cladding quenching method was employed for 7085 Al alloy slabs to tailor different quenching residual *** the effects of quenching residual stress on the precipitation behaviour of the 7085 Al alloy were investigated through finite element analysis,residual stress and hardness distri-bution measurements and microstructural *** results indicate that the reduction in resid-ual stress increases with increasing cladding layer *** a cladding layer thickness in the range of 1-1.4 mm,the residual stress is almost *** hardness at the surface of the aged sample with a large compressive residual stress is decreased,while the hardness at the centre of the sample with a large tensile residual stress is *** hardness is approximately identical between the aged sam-ples with little or no residual *** elastic lattice distortion caused by residual stress is found to promote the nucleation of precipitates during the artificial ageing *** in-depth mechanisms for the effect of quenching residual stress on the precipitation of 7085 Al alloy are also discussed.

关键词： Aluminium alloy Quenching Residual stress Precipitation Finite element method

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基于社会功能假说探讨应激对传染性哈欠的影响

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科学通报 2021年第24期66卷 3171-3181页

作者：苏金龙肖瑶苏彦捷北京大学心理与认知科学学院行为与心理健康北京市重点实验室北京100871 南京师范大学心理学院南京210024

看到周围有人打哈欠,我们自己可能也会跟着打哈欠,这种由他人哈欠诱发的哈欠被称为传染性哈欠.传染性哈欠在生活中很常见,但原因和机制的分析还非常有限.哈欠的社会功能假说认为,哈欠可能具有交流功能,用以传递威胁或预警信息,使得哈欠... 详细信息

看到周围有人打哈欠,我们自己可能也会跟着打哈欠,这种由他人哈欠诱发的哈欠被称为传染性哈欠.传染性哈欠在生活中很常见,但原因和机制的分析还非常有限.哈欠的社会功能假说认为,哈欠可能具有交流功能,用以传递威胁或预警信息,使得哈欠的传染具有一定的适应意义.然而,该假说更多的基于动物观察推测而来,少有实证探讨,在人类群体中相关考察更是稀少.基于这一假说,研究对60名大学生采用社会压力任务激活应激状态,监测心电反应并通过正性负性情绪量表中文版与放松状态主观评定问卷对自己当前的情绪状态进行自我评定,采用眼中读心任务测量心理理论,同时采用匹兹堡睡眠质量指数和斯坦福嗜睡量表控制睡眠状况和警觉程度,考察心理应激与传染性哈欠的关系及其影响因素.结果发现,心理应激会显著增强传染性哈欠,却不会影响自发性哈欠.同时,被试的心率变异性越高,对应影响越不明显;心理理论越高,对应影响则越明显.上述结果为哈欠的社会功能假说提供了支撑,提示传染性哈欠在漫长的演化过程中可能承担着重要的交流功能,有着特定的适应意义.

关键词：传染性哈欠心理应激演化心率变异性心理理论

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求偶动机的心理效应

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心理科学进展 2017年第4期25卷 609-626页

作者：苏金龙苏彦捷北京大学心理与认知科学学院行为与心理健康北京市重点实验室北京100871

演化心理学认为人类的心理机能受到演化压力的塑造,性选择作为重要的演化动力因素,在人类心理机能的形成过程中扮演着重要角色。与性选择密切相连的求偶动机可以影响包括注意、知觉、记忆、决策及社会行为在内的一系列心理现象和行为,... 详细信息

演化心理学认为人类的心理机能受到演化压力的塑造,性选择作为重要的演化动力因素,在人类心理机能的形成过程中扮演着重要角色。与性选择密切相连的求偶动机可以影响包括注意、知觉、记忆、决策及社会行为在内的一系列心理现象和行为,但求偶动机操控方法的混乱及研究过程中对文化和层级选择的忽视制约了这一领域工作的开展。进一步深化相关研究,以行为数据为基础,从神经、激素和基因层面建构立体的研究框架对于揭示背后机制有着重要作用。

关键词：演化心理学求偶动机性选择启动神经计算系统

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女性食物选择的演化视角:基于性选择过程的理论探讨

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心理科学进展 2022年第2期30卷 425-435页

作者：张阔苏金龙青岛理工大学人文与外国语学院山东青岛266525 南京师范大学心理学院南京210024

性选择在人类心理、行为等表型的演化过程中扮演了重要角色,但其对女性食物选择的影响却相对较少被关注。性选择塑造了男女不同的择偶策略,男性择偶时对女性外在吸引力的关注使得女性更加重视身材等外在吸引力信息。而女性身材与饮食的... 详细信息

性选择在人类心理、行为等表型的演化过程中扮演了重要角色,但其对女性食物选择的影响却相对较少被关注。性选择塑造了男女不同的择偶策略,男性择偶时对女性外在吸引力的关注使得女性更加重视身材等外在吸引力信息。而女性身材与饮食的密切联系,进一步提示性选择过程应该会对女性的食物选择产生影响。以之为基础,梳理求偶动机激活可能引发的女性食物选择的变化,以及女性生理期不同阶段在食物选择上的变异,有助于了解性选择过程对女性食物选择的影响。未来研究中,进一步从行为、激素、脑等不同层面剖析对应影响及涉及机制,对该领域的长远发展有重要意义。

关键词：性选择食物选择求偶动机排卵期女性

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superhydrophobic surface-Assisted Preparation of Microspheres and supraparticles and Their Applications

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Nano-Micro Letters 2024年第4期16卷 110-138页

作者： Mengyao Pan Huijuan Shao Yue Fan jinlong Yang Jiaxin Liu Zhongqian Deng Zhenda Liu Zhidi Chen Jun Zhang Kangfeng Yi Yucai su Dehui Wang Xu Deng Fei Deng Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 611731People’s Republic of China School of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518110People’s Republic of China Pharmaceutical Glass Co.Ltd Zibo 256100People’s Republic of China Department of Nephropathy School of MedicineSichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengduPeople’s Republic of China Department of Nephrology Sichuan Provincial People’s Hospital Jinniu HospitalChengdu Jinniu District People’s HospitalChengduPeople’s Republic of China

superhydrophobic surface(SHS) has been well developed, as SHS renders the property of minimizing the water/solid contact interface. Water droplets deposited onto SHS with contact angles exceeding 150°, allow them to retain spherical shapes, and the low adhesion of SHS facilitates easy droplet collection when tilting the substrate. These characteristics make SHS suitable for a wide range of applications. One particularly promising application is the fabrication of microsphere and supraparticle materials. SHS offers a distinct advantage as a universal platform capable of providing customized services for a variety of microspheres and supraparticles. In this review, an overview of the strategies for fabricating microspheres and supraparticles with the aid of SHS, including cross-linking process, polymer melting,and droplet template evaporation methods, is first presented. Then, the applications of microspheres and supraparticles formed onto SHS are discussed in detail, for example, fabricating photonic devices with controllable structures and tunable structural colors, acting as catalysts with emerging or synergetic properties, being integrated into the biomedical field to construct the devices with different medicinal purposes, being utilized for inducing protein crystallization and detecting trace amounts of analytes. Finally,the perspective on future developments involved with this research field is given, along with some obstacles and opportunities.

关键词： superhydrophobic surface Microspheres and supraparticles Photonic devices Catalysts Biomedical and trace detections

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