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学者姓名：雷永平
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Abstract ：
本发明提供了一种基于电磁自激励扰动制备均一金属颗粒的装置及方法，该装置包括：成球罐，成球罐的顶部设置耐高温绝缘陶瓷结构件，耐高温绝缘陶瓷结构件的内部设置电磁自激励扰动装置及熔化金属，耐高温绝缘陶瓷结构件的外部设置第一加热模块，成球罐的内部对应耐高温绝缘陶瓷结构件设置高温球化模块，高温球化模块的底部设置低温成球模块，低温成球模块的底部穿过成球罐的底部，成球罐的底部对应低温成球模块的底部设置颗粒收集容器，耐高温绝缘陶瓷结构件及成球罐连接气控系统。本发明提供的基于电磁自激励扰动制备均一金属颗粒的装置及方法，具有响应速度快、无接触驱动、可制备不同熔点的金属颗粒、生产效率高、运行可靠等优点。
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| GB/T 7714 | 雷永平 , 王同举 , 林健 et al. 一种基于电磁自激励扰动制备均一金属颗粒的装置及方法 : CN202310394904.6[P]. | 2023-04-14 . |
| MLA | 雷永平 et al. "一种基于电磁自激励扰动制备均一金属颗粒的装置及方法" : CN202310394904.6. | 2023-04-14 . |
| APA | 雷永平 , 王同举 , 林健 , 符寒光 . 一种基于电磁自激励扰动制备均一金属颗粒的装置及方法 : CN202310394904.6. | 2023-04-14 . |
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Abstract ：
针对超薄板焊后面外失稳变形的机理以及矫正的研究目前仍较少。以厚度为0.07 mm的不锈钢金属箔为研究对象，建立基于壳单元的有限元计算模型，采用热-力顺序耦合的方法针对激光焊中出现的波浪变形现象进行数值模拟。波形分布的数值模拟结果与实测基本吻合。分析认为在整个焊缝长度上的焊接应力会在焊接过程中自身平衡，拉伸应力区外会有压应力来平衡，从而产生间隔分布的局部压应力区导致波浪变形出现。发现采用0.15%的预拉伸方法可以大大减少薄板的面外失稳变形量，其主要原因是焊后焊缝中的塑性应变发生了由压缩向拉伸应变的转变。采用滚轴碾压可以矫正焊缝处的波浪变形，随焊碾压可以使超薄板焊后整体面外变形幅度降低，由原来的0...
Keyword ：
有限元模拟 有限元模拟 随焊碾压 随焊碾压 波浪变形 波浪变形 预拉伸 预拉伸
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| GB/T 7714 | 张景祺 , 相志磊 , 王细波 et al. 超薄板焊后波浪变形的形成原因及控制方法探讨 [J]. | 机械工程学报 , 2022 , 58 (04) : 72-79 . |
| MLA | 张景祺 et al. "超薄板焊后波浪变形的形成原因及控制方法探讨" . | 机械工程学报 58 . 04 (2022) : 72-79 . |
| APA | 张景祺 , 相志磊 , 王细波 , 雷永平 , 林健 . 超薄板焊后波浪变形的形成原因及控制方法探讨 . | 机械工程学报 , 2022 , 58 (04) , 72-79 . |
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Abstract ：
在不同沉积路径下采用冷金属过渡电弧增材制造技术制备了H13钢成形件，基于热-弹塑性有限元法对成形件的热历程进行了分析，并通过试验研究了成形件的显微组织和硬度。结果表明：同向和双向路径沉积得到5层单道和单层5道成形件的热历程基本一致，双向沉积5层单道成形件第3层中间点的峰值温度远高于双向沉积单层5道成形件第3道中间点，5层单道成形件的热累积效应更明显；5层单道成形件的板条状马氏体组织比单层5道成形件的粗大；同向沉积5层单道成形件在同一高度上的硬度略高于双向沉积成形件，同向沉积和双向沉积单层5道成形件在水平方向的硬度分布基本相同，5层单道成形件的平均硬度略低于单层5道成形件。
Keyword ：
冷金属过渡 冷金属过渡 电弧增材制造 电弧增材制造 硬度 硬度 显微组织 显微组织 沉积路径 沉积路径
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| GB/T 7714 | 李旭锋 , 林健 , 夏志东 et al. 不同沉积路径冷金属过渡电弧增材制造H13钢成形件的显微组织和硬度 [J]. | 机械工程材料 , 2022 , 46 (04) : 42-47,55 . |
| MLA | 李旭锋 et al. "不同沉积路径冷金属过渡电弧增材制造H13钢成形件的显微组织和硬度" . | 机械工程材料 46 . 04 (2022) : 42-47,55 . |
| APA | 李旭锋 , 林健 , 夏志东 , 韩文涛 , 雷永平 , 王招阳 . 不同沉积路径冷金属过渡电弧增材制造H13钢成形件的显微组织和硬度 . | 机械工程材料 , 2022 , 46 (04) , 42-47,55 . |
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Abstract ：
核电站反应堆正朝着高安全性、高燃耗及长运行周期发展.锆合金是关键的核燃料棒包壳材料,包壳管通过焊接方法与端塞形成连接,对燃料棒起到密封和隔绝作用.锆合金的高温性能,尤其是其焊接接头的服役性能是反应堆安全运行的重要保障.详细介绍了常用锆合金材料的物理、力学性能,涉及到的锆合金包括国产化的Zr-4合金、N36合金和CZ合金.对锆合金管-端塞接头的焊接工艺方法进行了总结,重点阐述了近年来锆合金燃料棒包壳管与端塞接头的电阻对焊研究成果.总结了锆合金电阻对焊接头显微组织特征和服役性能,并对包壳管与端塞电阻对焊方法的研究方向进行了展望.
Keyword ：
显微组织 显微组织 电阻对焊 电阻对焊 管-端塞结构 管-端塞结构 核燃料棒 核燃料棒 力学性能 力学性能 锆合金 锆合金
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| GB/T 7714 | 林健 , 冯刚 , 雷永平 et al. 核电用锆合金电阻对焊的研究进展 [J]. | 北京工业大学学报 , 2022 , (10) : 1078-1087 . |
| MLA | 林健 et al. "核电用锆合金电阻对焊的研究进展" . | 北京工业大学学报 10 (2022) : 1078-1087 . |
| APA | 林健 , 冯刚 , 雷永平 , 季顺成 , 崔泰然 , 鲁立 et al. 核电用锆合金电阻对焊的研究进展 . | 北京工业大学学报 , 2022 , (10) , 1078-1087 . |
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Abstract ：
深空探测是21世纪人类进行空间技术创新、太空资源探索与利用的重要途径，准直器是深空探测器的关键部件。大深度、高空间分辨率栅格准直器的制造在国际上一直是个难题。本文以我国自主研制的硬X射线调制望远镜卫星(HXMT)中能望远镜高精度准直器为例，介绍了自主研发的大深度、高空间分辨率准直器跨尺度栅格结构的激光精密微焊接制造方法、关键工艺技术及成套装备。对于壁厚为70μm、准直孔尺寸为1.17 mm×4.68 mm、深度为67 mm的钽片跨尺度栅格结构，准直孔尺寸精度控制在SymbolqB@20μm之内。
Keyword ：
激光技术 激光技术 跨尺度栅格 跨尺度栅格 微细加工 微细加工 深空探测 深空探测 准直器 准直器 激光精密焊接 激光精密焊接
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| GB/T 7714 | 黄婷 , 杜伟哲 , 苏坤 et al. 深空探测卫星准直器跨尺度栅格结构的激光精密微焊接技术与装备 [J]. | 中国激光 , 2022 , 49 (10) : 28-36 . |
| MLA | 黄婷 et al. "深空探测卫星准直器跨尺度栅格结构的激光精密微焊接技术与装备" . | 中国激光 49 . 10 (2022) : 28-36 . |
| APA | 黄婷 , 杜伟哲 , 苏坤 , 张建超 , 李敬洋 , 祁俊峰 et al. 深空探测卫星准直器跨尺度栅格结构的激光精密微焊接技术与装备 . | 中国激光 , 2022 , 49 (10) , 28-36 . |
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Abstract ：
本发明提供了一种测量厚板焊接件内部残余应力的方法。该发明基于固有应变法，通过对焊接固有应变进行分解，将原始焊接试样切割成不同形式的简单试样；采用X射线衍射法测量简单试样的残余应力值，进而采用有限元方法反算各简单试样的固有应变分布情况；通过固有应变的施加对内部残余应力进行有限元求解。包括：根据固有应变的分布特点，对固有应变分布进行分解，切割焊接件，分离出多个不同试样；对切割表面进行处理并以X射线衍射法测量其残余应力；根据测量结果建立试样二维固有应变计算模型，反算固有应变；最后建立原厚板焊接件内部残余应力计算模型，将固有应变作用到模型中，获得厚板焊接件内部残余应力分布，测量结果可靠，效率高。
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| GB/T 7714 | 林健 , 焦洋 , 刘昕 et al. 一种测量厚板焊接件内部残余应力的方法 : CN202210431994.7[P]. | 2022-04-22 . |
| MLA | 林健 et al. "一种测量厚板焊接件内部残余应力的方法" : CN202210431994.7. | 2022-04-22 . |
| APA | 林健 , 焦洋 , 刘昕 , 雷永平 , 符寒光 . 一种测量厚板焊接件内部残余应力的方法 : CN202210431994.7. | 2022-04-22 . |
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Abstract ：
In this paper, Ti6Al4V octahedron lattice structures with top cap and bottom base were fabricated through selective laser melting (SLM). The structural integrity, microstructural evolution, compressive properties and failure mechanism of as-fabricated (AF) and vacuum annealing treated (VAT) samples were studied through both experiments and numerical modeling. The X-ray computed tomography analysis revealed that vacuum annealing had an insignificant effect on internal pore elimination and porosity reduction. For both the AF and VAT samples, larger pores exhibited more irregular shape than smaller pores. The microstructural analysis suggested that vacuum annealing was able to transform acicular α/α` martensites into uniformly distributed lamellar α + β phases and also to cause the formation of nano-particle precipitation and dislocation. The compressive test indicted that the lattice structure with confined top and bottom had much better compressive properties than those without. Also, vacuum annealing significantly improved the compressive strength by 26% due to the synergistic effect of residual stress relief, nano-particle precipitation and dislocation strengthening. The ductility of the VAT sample was also improved as compared to the AF sample, which was mainly attributed to the formation of α + β phases. © 2020 The Authors
Keyword ：
Aluminum alloys Aluminum alloys Titanium alloys Titanium alloys Stress relief Stress relief Nanoparticles Nanoparticles Compressive strength Compressive strength Selective laser melting Selective laser melting Annealing Annealing Ternary alloys Ternary alloys Failure (mechanical) Failure (mechanical) Computerized tomography Computerized tomography Precipitation (chemical) Precipitation (chemical)
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| GB/T 7714 | Ge, Jinguo , Yan, Xingchen , Lei, Yongping et al. A detailed analysis on the microstructure and compressive properties of selective laser melted Ti6Al4V lattice structures [J]. | Materials and Design , 2021 , 198 . |
| MLA | Ge, Jinguo et al. "A detailed analysis on the microstructure and compressive properties of selective laser melted Ti6Al4V lattice structures" . | Materials and Design 198 (2021) . |
| APA | Ge, Jinguo , Yan, Xingchen , Lei, Yongping , Ahmed, Mansur , O'Reilly, Peter , Zhang, Chao et al. A detailed analysis on the microstructure and compressive properties of selective laser melted Ti6Al4V lattice structures . | Materials and Design , 2021 , 198 . |
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Abstract ：
Pulsed laser welding was used to join ultra thin Inconel 718 alloy foils whose thickness was 0.2 mm. A fixture was designed to obtain the edge joint. The joint geometry and hot cracking were both observed on the cross sections. The relationship between the height, width of the joint and the energy density were fitted as linear functions. The effect of heat input on the hot cracking in the edge joint was obtained. It was shown that a hot cracking occurred during the solidification of the molten metal under laser heating. The crack initiated at the gap between the foil pair and propagated along the Laves phase with low melting point. The crack length could be reduced by applying low heat input. Tearing tests were conducted to evaluate the influence of the cracking on the mechanical performance of edge joints. There existed two failure modes for the edge joint under a tear loading. When the crack length exceeds 106.9 μm the hot crack starts to propagate and the tear loading decreases with crack length increasing. A finite element model was established to simulate the stress evolution during the cooling stage. The main reason of crack initiation and propagation were both presented. © 2021 The Society of Manufacturing Engineers
Keyword ：
Welding Welding Liquid metals Liquid metals Pulsed lasers Pulsed lasers Cracks Cracks
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| GB/T 7714 | Lin, Jian , Wang, Xibo , Lei, Yongping et al. Study on hot cracking in laser welded joints of inconel 718 alloy foils [J]. | Journal of Manufacturing Processes , 2021 , 64 : 1024-1035 . |
| MLA | Lin, Jian et al. "Study on hot cracking in laser welded joints of inconel 718 alloy foils" . | Journal of Manufacturing Processes 64 (2021) : 1024-1035 . |
| APA | Lin, Jian , Wang, Xibo , Lei, Yongping , Wei, Ruigang , Guo, Fu . Study on hot cracking in laser welded joints of inconel 718 alloy foils . | Journal of Manufacturing Processes , 2021 , 64 , 1024-1035 . |
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Abstract ：
Uniform solder balls are widely used in 3D Printing and electronic packaging. Therefore, it needs a simple method for producing uniform solder balls at a higher quality. In this article, a novel and simple method was presented to produce uniform solder balls by the technology of electromagnetic force driving and differential pressure control. The results indicated that the uniform solder balls of Sn-58Bi alloy could be produced by two different modes of differential pressure control. The solder balls with a spherical degree between 0 and 3% and diameter with a mean variation of 4% were produced at different diameter and reasonable test parameters. © 2020 Elsevier B.V.
Keyword ：
Binary alloys Binary alloys Electronics packaging Electronics packaging 3D printers 3D printers Tin alloys Tin alloys Lead-free solders Lead-free solders Bismuth alloys Bismuth alloys Pressure control Pressure control
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| GB/T 7714 | Wang, Tongju , Lei, Yongping , Zhao, Peng et al. Based on the technology of electromagnetic force driving and differential pressure control for producing solder balls [J]. | Materials Letters , 2021 , 286 . |
| MLA | Wang, Tongju et al. "Based on the technology of electromagnetic force driving and differential pressure control for producing solder balls" . | Materials Letters 286 (2021) . |
| APA | Wang, Tongju , Lei, Yongping , Zhao, Peng , Lin, Jian , Fu, Hanguang . Based on the technology of electromagnetic force driving and differential pressure control for producing solder balls . | Materials Letters , 2021 , 286 . |
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Abstract ：
In this work, H13 buildups were produced through wire-arc additive manufacturing based on cold metal transfer technology. Four different deposition strategies were employed for the fabrication and the microstructural evolution and mechanical properties of the corresponding buildups were compared. A bimodal microstructure for all buildups produced in the overlap zone (OZ) and body zone (BZ), respectively, despite a mixture of lath-shaped martensites and blocky delta-ferrites in the OZ and a slightly coarser but still fine martensites in the BZ. The as-deposited mechanical properties were evidently superior to the properties of the base metal after annealing, but slightly inferior to that after quenching and tempering. Compared with the components with different deposition patterns between adjacent layers, the relatively enhanced hardness and wear-resistance properties were acquired for the ones with the same scanning strategies, being responsible for the smaller retained delta-ferrite size in the OZ and slightly refined martensites in the BZ. The deposition strategy had a negligible influence on the wear surface hardness, all decreasing gradually from the wear zone to the transient zone and finally keeping stable as a result of the locally martensitic evolution. As the in-situ thermal history was influenced by the deposition strategies, both of the microstructural distribution and mechanical performances were affected by the deposition strategies. Besides, the applied strategies, characterized by the different scanning directions between adjacent tracks, had a negligible influence on microstructures and mechanical properties following comparison with the counterparts with the different directions between adjacent layers. (C) 2020 Published by Elsevier B.V.
Keyword ：
Mechanical performances Mechanical performances Wire arc additive manufacturing Wire arc additive manufacturing Microstructural evolution Microstructural evolution Deposition strategy Deposition strategy H13 blocky buildups H13 blocky buildups
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| GB/T 7714 | Ge, Jinguo , Fan, Ningsong , Long, Yuhong et al. Investigation on H13 buildups produced with wire arc additive manufacturing: Deposition strategies-induced microstructural evolution and mechanical performances [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 860 . |
| MLA | Ge, Jinguo et al. "Investigation on H13 buildups produced with wire arc additive manufacturing: Deposition strategies-induced microstructural evolution and mechanical performances" . | JOURNAL OF ALLOYS AND COMPOUNDS 860 (2021) . |
| APA | Ge, Jinguo , Fan, Ningsong , Long, Yuhong , Lin, Jian , Lei, Yongping , Yin, Shuo . Investigation on H13 buildups produced with wire arc additive manufacturing: Deposition strategies-induced microstructural evolution and mechanical performances . | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 860 . |
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