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摘要 ：
The Mo-10Si-(0, 5, 10, 15)B (at.%) alloys located in Moss (Mo solid solution) +Mo3Si +T2 (Mo5SiB2) region were prepared by arc melting. The effect of B content on the microstructure, microhardness, fracture toughness and oxidation resistance of the alloys was studied. In the Mo-10Si alloy, there are primary Mo-ss and peritectic Mo3Si phases. With the addition of B, (Mo-ss + T2) binary and (Mo-ss + T2 + Mo3Si) ternary eutectics emerge in Mo-10Si-(5, 10)B alloys. For Mo-10Si-15B alloy, primary Moss disappears and the mi-crostructure is only composed of binary and ternary eutectics. With the increase of B content, the proportion and grain size of Mo-ss decrease. The microhardness of alloys increases with the increase of B content due to the increasing intermetallics. The fracture toughness of alloys decreases obviously in single-edge notched three-point bending testing (SENB) and the fracture mode transforms from transgranular fracture to intergranular fracture because of the refinement of Mo-ss. In the high-temperature oxidation test at 1250 degrees C, the oxidation weight loss of the alloys decreases with the addition of B due to the densification of the borosilicate layer. (C) 2021 Elsevier B.V. All rights reserved.
关键词 ：
B content B content Fracture toughness Fracture toughness Microstructure Microstructure Mo-Si-B alloys Mo-Si-B alloys Oxidation resistance Oxidation resistance
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| GB/T 7714 | Jin, Ming , He, Dingyong , Shao, Wei et al. Influence of B contents on the microstructure, fracture toughness and oxidation resistance of Mo-Si-B alloys [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 890 . |
| MLA | Jin, Ming et al. "Influence of B contents on the microstructure, fracture toughness and oxidation resistance of Mo-Si-B alloys" . | JOURNAL OF ALLOYS AND COMPOUNDS 890 (2022) . |
| APA | Jin, Ming , He, Dingyong , Shao, Wei , Tan, Zhen , Guo, Xingye , Zhou, Zheng et al. Influence of B contents on the microstructure, fracture toughness and oxidation resistance of Mo-Si-B alloys . | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 890 . |
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摘要 ：
本发明公开了一种利用激光增材制备点阵结构非晶‑纳米晶合金的方法，属于金属激光增材制造技术领域，所述方法包括：制备符合激光增材制造需求且具有较高非晶形成能力的锆基/钛基非晶合金粉末，利用激光增材制造技术获得能够成形非晶/纳米晶合金的临界尺寸及其相匹配的工艺参数，结合临界尺寸及点阵结构的静力载荷应力分布情况，完成强塑性匹配的点阵结构设计，在此基础上，利用激光增材制造技术制备点阵结构非晶/纳米晶合金。本发明所制备的点阵结构非晶/纳米晶合金具有高的比强度和塑性变形能力。
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| GB/T 7714 | 谈震 , 李锦涛 , 贺定勇 et al. 一种利用激光增材制备点阵结构非晶-纳米晶合金的方法 : CN202110018514.X[P]. | 2021-01-07 . |
| MLA | 谈震 et al. "一种利用激光增材制备点阵结构非晶-纳米晶合金的方法" : CN202110018514.X. | 2021-01-07 . |
| APA | 谈震 , 李锦涛 , 贺定勇 , 周正 , 郭星晔 , 崔丽 et al. 一种利用激光增材制备点阵结构非晶-纳米晶合金的方法 : CN202110018514.X. | 2021-01-07 . |
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摘要 ：
With its high infection rate, COVID-19 has swept the globe and brought great challenges to social life and economies. As an essential form of public transportation, the Beijing subway plays an important role in transportation systems. In traditional subway organizations, all one-sided doors of a train carriage are employed for passengers' alighting and boarding. A higher risk of COVID-19 infections may be attributed to inevitable bidirectional conflicts at doors with higher passenger volumes. Moreover, quantitative analyses for this problem and corresponding solutions are, limited in recent studies. In this research, conflicts at carriage doors are analyzed using a cellular automaton (CA) based model. Four schemes to separate alighting and passenger boarding into separate doors are investigated. The performances of different schemes with various alighting and boarding passenger ratios are simulated with the software package Legion Studio. Both macroscopic and microscopic parameters to characterize passenger conflicts are obtained for analysis. The separation of alighting and boarding passenger flows yields the desired reduction in bidirectional conflicts, which further limits the probability of infectious disease exposure. This is an important reference to improve current practices and provide specific measurements of passenger organization under abnormal situations. (c) 2021 Elsevier B.V. All rights reserved.
关键词 ：
Alighting and boarding Alighting and boarding Cellular automata Cellular automata Legion Studio Legion Studio Passenger conflict Passenger conflict Subway station Subway station
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| GB/T 7714 | Sun, Lishan , Yuan, Guang , Yao, Liya et al. Study on strategies for alighting and boarding in subway stations [J]. | PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS , 2021 , 583 . |
| MLA | Sun, Lishan et al. "Study on strategies for alighting and boarding in subway stations" . | PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS 583 (2021) . |
| APA | Sun, Lishan , Yuan, Guang , Yao, Liya , Cui, Li , Kong, Dewen . Study on strategies for alighting and boarding in subway stations . | PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS , 2021 , 583 . |
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摘要 ：
AlSi10Mg合金是目前激光选区熔化(Selective laser melting,SLM)技术应用最为成熟的铝基合金,其优异的SLM成形质量使其备受关注,然而目前SLM成形的AlSi10Mg合金力学性能还无法完全满足航空航天领域的需求。为进一步强化SLM成形AlSi10Mg合金的性能,采用预合金技术制备的AlSi10Mg-0.6Er-0.4Zr合金粉末,制备SLM成形试样,研究了激光能量密度对AlSi10Mg-0.6Er-0.4Zr合金SLM成形试样相对密度的影响,并与相同工艺参数条件下AlSi10Mg合金SLM成形试样的力学性能进行比较。研究结果表明,随着激光能量密度的增加SLM成形A...
关键词 ：
激光选区熔化 激光选区熔化 显微组织 显微组织 AlSi10Mg AlSi10Mg 力学性能 力学性能 稀土元素 稀土元素
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| GB/T 7714 | 杨天野 , 崔丽 , 贺定勇 et al. 激光选区熔化AlSi10Mg-0.6Er-0.4Zr成形组织及性能研究 [C] //第二十四次全国焊接学术会议“计算机辅助焊接工程”分会场摘要集 . 2020 . |
| MLA | 杨天野 et al. "激光选区熔化AlSi10Mg-0.6Er-0.4Zr成形组织及性能研究" 第二十四次全国焊接学术会议“计算机辅助焊接工程”分会场摘要集 . (2020) . |
| APA | 杨天野 , 崔丽 , 贺定勇 , 郭星晔 , 黄晖 . 激光选区熔化AlSi10Mg-0.6Er-0.4Zr成形组织及性能研究 第二十四次全国焊接学术会议“计算机辅助焊接工程”分会场摘要集 . (2020) . |
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摘要 ：
随着激光选区熔化(SLM)技术的发展,采用焊接技术对SLM件进行连接、修复具有重要的意义。针对铝合金SLM件焊接氢气孔倾向大的问题,基于激光熔化沉积成形(LMD)原理,采用LMD工艺对SLM制备的Al Si10Mg合金对接接头进行焊接工艺探索,与激光单道填粉焊接头比较,分析LMD焊接工艺对接头的微观组织、力学性能和气孔特性的影响。结果表明,两种工艺下接头焊缝区的平均显微硬度均低于母材,发生接头的软化。但相对于激光单道填粉焊接头,LMD焊接头的显微硬度从焊缝上层到下层从92.7HV提高到101.5HV、98.0HV和93.1HV,焊缝晶粒尺寸从约6.2μm减小至2.6～4.9μm之间,气孔率从5...
关键词 ：
Al Si10Mg Al Si10Mg 晶粒细化 晶粒细化 气孔 气孔 激光选区熔化 激光选区熔化
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| GB/T 7714 | 彭志勃 , 崔丽 , 贺定勇 et al. 激光熔化沉积焊接对激光选区熔化AlSi10Mg合金接头组织性能及气孔率的影响 [C] //第二十四次全国焊接学术会议“计算机辅助焊接工程”分会场摘要集 . 2020 . |
| MLA | 彭志勃 et al. "激光熔化沉积焊接对激光选区熔化AlSi10Mg合金接头组织性能及气孔率的影响" 第二十四次全国焊接学术会议“计算机辅助焊接工程”分会场摘要集 . (2020) . |
| APA | 彭志勃 , 崔丽 , 贺定勇 , 曾勇 , 曹庆 . 激光熔化沉积焊接对激光选区熔化AlSi10Mg合金接头组织性能及气孔率的影响 第二十四次全国焊接学术会议“计算机辅助焊接工程”分会场摘要集 . (2020) . |
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摘要 ：
Three-dimensional connected W-Cul OSn composites materials with high relative density (99.36%) were fabricated through selective laser melting (SLM). The densification process of the composite balanced the melting of W, evaporation of Cu/Sn and the spreading of melted alpha-Cu. Under the optimized SLM parameters, high laser power (LP) melted the most of W powder, the adjacent laser scanning track with small hatch space (HS) could fuse W phase together. With small HS and low scanning speed (SS), the spreading of melted alpha-Cu could fill up the pores caused by the evaporation of Cu/Sn. Finally, a three-dimensional connected structure is formed by W phase, and alpha-Cu phase occupied the gaps the gaps among W phase. (C) 2020 Elsevier B.V. All rights reserved.
关键词 ：
Composite materials Composite materials Evaporation Evaporation Selective laser melting Selective laser melting Solidification Solidification Three-dimensional connected structure Three-dimensional connected structure
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| GB/T 7714 | Zhou, Zhenlu , Tan, Zhen , He, Dingyong et al. Fabrication of three-dimensional connected W-Cu10Sn composites by selective laser melting [J]. | MATERIALS LETTERS , 2020 , 264 . |
| MLA | Zhou, Zhenlu et al. "Fabrication of three-dimensional connected W-Cu10Sn composites by selective laser melting" . | MATERIALS LETTERS 264 (2020) . |
| APA | Zhou, Zhenlu , Tan, Zhen , He, Dingyong , Zhou, Zheng , Cui, Li , Wang, Yiming et al. Fabrication of three-dimensional connected W-Cu10Sn composites by selective laser melting . | MATERIALS LETTERS , 2020 , 264 . |
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摘要 ：
Almost fully dense ALCrFeNiV HEA consisting of face-centred-cubic (FCC) solid solution and L1(2) nano phase was prepared from gas-atomized alloy powder with optimized selective laser melting (SLM) processing parameters. Microstructure characterization reveals the presence of hierarchical structures including columnar grains, sub-grains, L1(2) nano phase and dislocations in SLMed HEA. Unique columnar grains ranging from several tens of microns up to 200 mu m grow along the direction of the temperature gradient. High cooling speed and non-equilibrium solidification during SLM process induced the formation of sub-grains in every columnar grain, accompanied with the heterogeneous distribution of dislocations and L1(2) nano phase. The SLMed AlCrFeNiV HEA exhibited an outstanding combination of high strength (ultimate tensile strength similar to 1057.47 MPa) and excellent ductility (plastic strain similar to 30.3%). The characteristic hierarchically heterogeneous structure contributes to the increase of strength without losing ductility. The sub-grains contribute significantly to the enhanced strength through dislocation hardening. The excellent ductility is correlated with the progressive work-hardening mechanism regulated by the heterogeneous distribution dislocation and L1(2 )nano phase within sub-grains. (C) 2019 Elsevier B.V. All rights reserved.
关键词 ：
Hierarchically heterogeneous microstructure Hierarchically heterogeneous microstructure High entropy alloy High entropy alloy High strength-ductility High strength-ductility L1(2 )nano phase L1(2 )nano phase Selective laser melting (SLM) Selective laser melting (SLM)
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| GB/T 7714 | Yao, Haili , Tan, Zhen , He, Dingyong et al. High strength and ductility AlCrFeNiV high entropy alloy with hierarchically heterogeneous microstructure prepared by selective laser melting [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2020 , 813 . |
| MLA | Yao, Haili et al. "High strength and ductility AlCrFeNiV high entropy alloy with hierarchically heterogeneous microstructure prepared by selective laser melting" . | JOURNAL OF ALLOYS AND COMPOUNDS 813 (2020) . |
| APA | Yao, Haili , Tan, Zhen , He, Dingyong , Zhou, Zhenlu , Zhou, Zheng , Xue, Yunfei et al. High strength and ductility AlCrFeNiV high entropy alloy with hierarchically heterogeneous microstructure prepared by selective laser melting . | JOURNAL OF ALLOYS AND COMPOUNDS , 2020 , 813 . |
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摘要 ：
Dissimilar joining of 6 mm thick steel/Al butt joints was carried out using a novel laser offset welding process. The effect of the different locations at the interface on the intermetallic compound (IMC) layers of the joints produced by two different laser powers was investigated. Microstructure inhomogeneity of the IMC layers was investigated in terms of phase morphology, thickness, grain size, main component and phase compositions. As a result, the IMC layer at the interface has the same phase types consisting of eta-Fe2Al5 and theta-Fe4Al13 phase for the three locations produced by two laser powers. However, the morphology of the theta-Fe4Al13 phases, the grain size and the thickness of the eta-Fe2Al5 layers, and the predominant component in the IMC layers is strongly affected by the laser powers and the locations at the interface. The highest UTS of 85.5 MPa is obtained at the middle location due to the formation of the thinner eta-Fe2Al5 layers and the minimum amount of theta-Fe4Al13 phases. Decreasing laser energy inputs effectively improves the IMC layer uniformity, and the influence of locations at the interface on the IMC layer thickness will be weakened with further decreasing the energy inputs. The heating temperature at the interface has a very important impact on the thickness of the eta-Fe2Al5 layer attributed to the ferrite or austenite phases appeared in the steel substrate affecting the growth rate of the eta-Fe2Al5 layers.
关键词 ：
Dissimilar steel/Al butt joints Dissimilar steel/Al butt joints EBSD phase mapping EBSD phase mapping IMC layers IMC layers Laser welding Laser welding Microstructure inhomogeneity Microstructure inhomogeneity
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| GB/T 7714 | Cui, Li , Wei, Zhushi , Ma, Biao et al. Microstructure inhomogeneity of dissimilar steel/Al butt joints produced by laser offset welding [J]. | JOURNAL OF MANUFACTURING PROCESSES , 2020 , 50 : 561-572 . |
| MLA | Cui, Li et al. "Microstructure inhomogeneity of dissimilar steel/Al butt joints produced by laser offset welding" . | JOURNAL OF MANUFACTURING PROCESSES 50 (2020) : 561-572 . |
| APA | Cui, Li , Wei, Zhushi , Ma, Biao , He, Dingyong , Huang, Hui , Cao, Qing . Microstructure inhomogeneity of dissimilar steel/Al butt joints produced by laser offset welding . | JOURNAL OF MANUFACTURING PROCESSES , 2020 , 50 , 561-572 . |
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摘要 ：
This present work explored the welding process of gas metal arc welding for 4mm 5E61 Er-containing aluminum alloy, and then analyzed the microstructure and mechanical properties of the welded joint. The results demonstrated that when the welding current was 160A-220A, the welded joint penetration depth range was 5.75mm to 6.72mm, the melting width ranging from 9.68mm to 11.61mm. When the arc voltage increased from 17.5V to 22.5V, the penetration depth of the welded joint reduced from 6.95mm to 5.57mm, and the melting width ranged from 6.64mm to 11.86mm. When the welding current was 170A, the arc voltage was 17.5V, and the welding speed was 10mm/s. In the third case, a fully penetrated welded joint can be obtained and the joint strength was the highest value. The yield strength reached 192 MPa, the tensile strength can be 301 MPa, and the fracture location occurred in the HAZ. The weld zone of the welded joint mainly consist of the equiaxed dendrites size of 50 μm. The micro-hardness of the weld zone was lower than that of the base metal, and there was no obvious softening phenomenon in the heat affected zone. © 2020 Trans Tech Publications Ltd, Switzerland.
关键词 ：
Aluminum alloys Aluminum alloys Erbium alloys Erbium alloys Gas metal arc welding Gas metal arc welding Gas welding Gas welding Heat affected zone Heat affected zone Melting Melting Microhardness Microhardness Tensile strength Tensile strength Textures Textures
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| GB/T 7714 | Haozhen, Guo , Li, Cui , Hui, Huang et al. Microstructure and mechanical properties of gmaw welded joints Er-containing aluminum alloy [C] . 2020 : 92-99 . |
| MLA | Haozhen, Guo et al. "Microstructure and mechanical properties of gmaw welded joints Er-containing aluminum alloy" . (2020) : 92-99 . |
| APA | Haozhen, Guo , Li, Cui , Hui, Huang , Xiao, Guo , Dingyong, He . Microstructure and mechanical properties of gmaw welded joints Er-containing aluminum alloy . (2020) : 92-99 . |
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摘要 ：
分别采用光纤激光焊接和激光-MIG复合焊接方法焊接6 mm厚E36钢板,研究焊接接头的显微组织、力学性能和腐蚀性能。结果表明:在不同的焊接方法下均可获得全熔透的接头,单激光焊接获得的接头呈现典型的"匙孔型"特征,激光-MIG电弧复合焊时获得的接头呈现复合焊特有的"高脚杯"特征。激光焊接时焊缝区组织主要由板条马氏体组成,激光-MIG复合焊接时,接头焊缝区有侧板条铁素体产生;激光焊接和激光-MIG复合焊接时,焊接接头热影响区组织的物相主要由铁素体、珠光体和少量粒状贝氏体组成。不同焊接方法下接头的抗拉强度和屈服强度变化不大,焊接接头最高硬度均出现在焊缝处。同一焊接方法下,焊接速度为2.1 m/min...
关键词 ：
性能 性能 接头 接头 激光-MIG复合焊 激光-MIG复合焊 激光焊 激光焊 组织 组织
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| GB/T 7714 | 高艳 , 顾长石 , 崔丽 et al. E36钢光纤激光焊与光纤激光-MIG复合焊接头组织及性能分析 [J]. | 热加工工艺 , 2019 , 48 (03) : 62-65,69 . |
| MLA | 高艳 et al. "E36钢光纤激光焊与光纤激光-MIG复合焊接头组织及性能分析" . | 热加工工艺 48 . 03 (2019) : 62-65,69 . |
| APA | 高艳 , 顾长石 , 崔丽 , 贺定勇 , 常耀卿 . E36钢光纤激光焊与光纤激光-MIG复合焊接头组织及性能分析 . | 热加工工艺 , 2019 , 48 (03) , 62-65,69 . |
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