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学者姓名：陈子勇
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摘要 ：
Synergistic micro-alloying with Ti-Zr effectively enhances the mechanical properties of cast Al-Cu-Mn alloys. In this study, the connection between microstructure evolution and mechanical properties of Al-Cu-Mn alloy through gravity casting was investigated with synergistic addition of Ti and Zr elements, aiming to promote the strength and toughness of Al-Cu-Mn alloy. The results showed that synergistic addition of 0.15 wt%Ti and 0.2 wt%Zr refined grains owing to the constitutional supercooling caused by Ti and Zr. A large number of Al3(Ti,Zr)-L12 dispersoids with core-shell structure uniformly precipitated within the grains during the solution process. The Al3(Ti,Zr) dispersoids served as heterogeneous nucleation sites for theta '(Al2Cu) precipitates during aging. As confirmed by quantitative analysis, Ti-Zr-modified alloys (with 0.15 wt%Ti and 0.2 wt%Zr) exhibited finer and more densely populated theta ' precipitates than unmodified alloys, resulting in superior mechanical properties. In the peak-aged state, the ultimate tensile strength, yield strength and elongation of Ti-Zr-modified alloy were 530.5 MPa, 462.8 MPa and 7.6%, respectively, which were mainly ascribed to grain boundaries strengthening, solution strengthening and precipitation strengthening. This work is expected to provide reliable theoretical guidance for the successful preparation of high-strength and high toughness Ti-Zr-modified aluminum alloys.
关键词 ：
mechanical property mechanical property core-shell structure Al-3(Ti,Zr) dispersoids core-shell structure Al-3(Ti,Zr) dispersoids Al-Cu-Mn cast alloy Al-Cu-Mn cast alloy strengthening mechanism strengthening mechanism
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| GB/T 7714 | Li, Jihao , Xiang, Zhilei , Shen, Gaoliang et al. Microstructure Evolution and Strengthening Mechanisms of Cast Al-Cu-Mn Alloy via Ti-Zr-Synergistic Micro-alloying [J]. | INTERNATIONAL JOURNAL OF METALCASTING , 2024 , 18 (4) : 3190-3209 . |
| MLA | Li, Jihao et al. "Microstructure Evolution and Strengthening Mechanisms of Cast Al-Cu-Mn Alloy via Ti-Zr-Synergistic Micro-alloying" . | INTERNATIONAL JOURNAL OF METALCASTING 18 . 4 (2024) : 3190-3209 . |
| APA | Li, Jihao , Xiang, Zhilei , Shen, Gaoliang , Huang, Jingcun , Zhou, Zongyi , Sun, Wencao et al. Microstructure Evolution and Strengthening Mechanisms of Cast Al-Cu-Mn Alloy via Ti-Zr-Synergistic Micro-alloying . | INTERNATIONAL JOURNAL OF METALCASTING , 2024 , 18 (4) , 3190-3209 . |
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摘要 ：
一种微纳双尺度TiB2颗粒增强铝基复合材料与双级热处理工艺，属于铝合金和颗粒增强铝基复合材料领域。按照下述步骤进行：①按合金成分配料熔炼、浇铸。②采用双级固溶热处理工艺，先对微纳颗粒增强铝基复合材料进行一级固溶热处理515℃/6h，然后再进行二级固溶热处理530℃/1.5h，将双级固溶处理合金在10秒内进行水淬。最后将水淬试样在170℃进行8h单级时效热处理，最终得到时效态3wt％TiB2微纳颗粒增强高强铝基复合材料。可以达到合金在不发生过烧现象的前提下固溶更多金属间化合物的目的，最终制备出的时效态双尺度颗粒增强铝基复合材料具有较高的高温力学性能。
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| GB/T 7714 | 陈子勇 , 唐元琛 , 相志磊 et al. 一种微纳双尺度TiB2颗粒增强铝基复合材料与双级热处理工艺 : CN202310152662.X[P]. | 2023-02-16 . |
| MLA | 陈子勇 et al. "一种微纳双尺度TiB2颗粒增强铝基复合材料与双级热处理工艺" : CN202310152662.X. | 2023-02-16 . |
| APA | 陈子勇 , 唐元琛 , 相志磊 , 黄景存 , 李继豪 , 申高亮 et al. 一种微纳双尺度TiB2颗粒增强铝基复合材料与双级热处理工艺 : CN202310152662.X. | 2023-02-16 . |
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摘要 ：
一种高温性能优异的多组元耐高温钛合金及制备方法，属于钛合金技术领域。多组元高温钛合金的质量百分比组分Al：6‑7％，Sn：2‑3％，Zr：8‑10％，Mo：0.4％‑1.0％，Nb：0.5％‑1.2％，W：0.5％‑1.2％，Si：0.2％‑0.4％，Re：0.08％‑0.2％，余量为Ti。制备新型多组元高温钛合金，多向等温锻造后采用单向轧制，而后进行固溶时效处理来大幅提高其高温性能。650℃下，抗拉强度超大于等于700MPa，延伸率大于等于30％。
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| GB/T 7714 | 陈子勇 , 韩竟俞 , 周宗熠 et al. 一种高温性能优异的多组元耐高温钛合金及制备方法 : CN202310254916.9[P]. | 2023-03-07 . |
| MLA | 陈子勇 et al. "一种高温性能优异的多组元耐高温钛合金及制备方法" : CN202310254916.9. | 2023-03-07 . |
| APA | 陈子勇 , 韩竟俞 , 周宗熠 , 申高亮 , 黄景存 , 李继豪 et al. 一种高温性能优异的多组元耐高温钛合金及制备方法 : CN202310254916.9. | 2023-03-07 . |
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摘要 ：
Two types of diacetatozirconic acid-yttria molds which were labeled as ZYW mold (diacetatozirconic acid-yttria mold with traces of ammonium metatungstate in the slurry) and ZY mold (diacetatozirconic acid-yttria mold without ammonium metatungstate) were prepared by traditional investment casting. The ZYW and ZY molds were sintered in a carbon-reducing atmosphere and in air, respectively, at 1550 degrees C for 4 h. Interactions between Ti-47Al-2Cr-2Nb (at%) alloys and the molds at 1650 degrees C for 30 min were studied. The microstructures of the metal-mold interfaces and the presence of inclusions and oxygen contamination in the TiAl bulk alloy were analyzed, and the influences of ammonium metatungstate were discussed. The results indicate that WO3 releases O into the TiAl melt, introducing tungsten metal into the alloy matrix. The TiAl alloy ingots cast in the ZY molds had the fewest inclusions and the lowest oxygen contamination.
关键词 ：
Interactions Interactions Ammonium metatungstate Ammonium metatungstate Diacetatozirconic acid-yttria molds Diacetatozirconic acid-yttria molds TiAl-based alloys TiAl-based alloys
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| GB/T 7714 | Cui, Yong-Shuang , Liu, De-Bo , Chai, Li-Hua et al. Interface reactions between TiAl alloys and diacetatozirconic acid-yttria molds differentiated by ammonium metatungstate addition [J]. | RARE METALS , 2023 , 42 (1) : 296-301 . |
| MLA | Cui, Yong-Shuang et al. "Interface reactions between TiAl alloys and diacetatozirconic acid-yttria molds differentiated by ammonium metatungstate addition" . | RARE METALS 42 . 1 (2023) : 296-301 . |
| APA | Cui, Yong-Shuang , Liu, De-Bo , Chai, Li-Hua , Chen, Zi-Yong . Interface reactions between TiAl alloys and diacetatozirconic acid-yttria molds differentiated by ammonium metatungstate addition . | RARE METALS , 2023 , 42 (1) , 296-301 . |
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摘要 ：
The interfacial precipitation of reinforced particles has a critical influence on particle-reinforced aluminummatrix composites. In this study, TiB2 interfacial precipitation of 6 wt% TiB2/Al-10Zn-2.3 Mg-2Cu-0.12Zr composite was studied. The results demonstrate that the TiB2 surface has a considerable impact on precipitation during different states of the composite preparation process (including heat treatments). The TiB2 surface acted as a nucleation site for D023-Al3Zr and was wrapped with the T phase during solidification; a good orientation relationship existed between TiB2 and D023-Al3Zr: (0 00 1)TiB2//(1 03)D023-Al3Zr, (1 01 0)TiB2//(1 05)D023-Al3Zr, and [1 21 0]TiB2//[0 1 0]D023-Al3Zr. After homogenization or solution, the TiB2 wall hindering solute atoms diffused into the matrix, particularly for Mg and Cu, causing the T phase to dissolve incompletely, and the residual T phase on the TiB2 surface transformed to the S phase layer at a longer holding time. Additionally, the hindering effect of the TiB2 walls results in the enhancement of the local high solute atom concentration and provides a high precipitation driving force. Therefore, the interfacial phase, Mg(Cu2-XZnX), preferentially precipitated at the D023-Al3Zr and S phase interface during peak aging. In this process, the periodic misfit dislocations of the interface facilitate the diffusion of solute atoms and reduce the nucleation energy barrier, promoting interfacial precipitation. Eventually, the interfacial precipitates layer relieved the local stress concentration but consumed the solute atoms, which was considered to be beneficial to plasticity at the cost of strength weakening to achieve excellent comprehensive mechanical properties.
关键词 ：
Metallic composites Metallic composites Characterization Characterization Microstructure Microstructure Interfaces Interfaces
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| GB/T 7714 | Huang, Jingcun , Xiang, Zhilei , Tang, Yuanchen et al. Interfacial precipitation of the in-situ TiB2-reinforced Al-Zn-Mg-Cu-Zr composite [J]. | MATERIALS CHEMISTRY AND PHYSICS , 2023 , 301 . |
| MLA | Huang, Jingcun et al. "Interfacial precipitation of the in-situ TiB2-reinforced Al-Zn-Mg-Cu-Zr composite" . | MATERIALS CHEMISTRY AND PHYSICS 301 (2023) . |
| APA | Huang, Jingcun , Xiang, Zhilei , Tang, Yuanchen , Li, Jihao , Shen, Gaoliang , Shi, Guodong et al. Interfacial precipitation of the in-situ TiB2-reinforced Al-Zn-Mg-Cu-Zr composite . | MATERIALS CHEMISTRY AND PHYSICS , 2023 , 301 . |
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摘要 ：
一种TiB2颗粒增强Al‑Zn‑Mg‑Cu‑Zr复合材料制备及非等温固溶工艺，属于铝基复合材料制备技术领域。按下述步骤进行：①按材料成分配料进行熔炼，通过半连续铸造技术得到铸锭；②采用400℃/6h+465℃/30h对铸锭进行均匀化退火，③将均匀化后的复合材料在400～420℃预热2h后进行热锻造、轧制或热挤压处理；④将热加工后的复合材料进行非等温固溶工艺。初始温度为400～440℃，以0.5～1℃/min的升温速率缓慢升温至460～480℃；在460～480℃温度下保温20～40min，淬火后进行T6峰时效处理，得到具有优异的强度、延伸率、弹性模量的复合材料。
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| GB/T 7714 | 陈子勇 , 黄景存 , 相志磊 et al. 一种TiB2颗粒增强Al-Zn-Mg-Cu-Zr复合材料制备及非等温固溶工艺 : CN202211352584.X[P]. | 2022-10-31 . |
| MLA | 陈子勇 et al. "一种TiB2颗粒增强Al-Zn-Mg-Cu-Zr复合材料制备及非等温固溶工艺" : CN202211352584.X. | 2022-10-31 . |
| APA | 陈子勇 , 黄景存 , 相志磊 , 韩杨 , 王屿鑫 , 李萌 et al. 一种TiB2颗粒增强Al-Zn-Mg-Cu-Zr复合材料制备及非等温固溶工艺 : CN202211352584.X. | 2022-10-31 . |
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摘要 ：
The influence of B and Y on the microstructure, microsegregation, and tensile behaviour of the Ti45A18Nb0.2W0.25Cr (at%) alloy was investigated. The beta-stabilizer elements in the high-Nb TiAl alloy promote the formation of the gamma phase in the microsegregation region and lead to the formation of large blocky microsegregation areas. The large blocky microsegregation regions with low specific surface areas reduce the nucleation rate of cavities and cracks at the interfaces of the microsegregation, which are harmful to colony boundary strengthening and decrease tensile resistance. The addition of B and Y affords an obvious refinement in the lamellar colony, renders an increasing opportunity for cavity nucleation at the colony boundary, and thus improves the tensile resistance. The tensile mechanisms of the alloys before and after (B, Y) addition were also compared and analysed.
关键词 ：
microsegregation microsegregation microstructure microstructure tension tension TiAl TiAl
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| GB/T 7714 | Gong Ziqi , Wu Jin , Sun Wei et al. Effects of B and Y Additions on the Microstructure and Tensile Behaviour of High-Nb TiAl Alloys [J]. | RARE METAL MATERIALS AND ENGINEERING , 2021 , 50 (8) : 2760-2764 . |
| MLA | Gong Ziqi et al. "Effects of B and Y Additions on the Microstructure and Tensile Behaviour of High-Nb TiAl Alloys" . | RARE METAL MATERIALS AND ENGINEERING 50 . 8 (2021) : 2760-2764 . |
| APA | Gong Ziqi , Wu Jin , Sun Wei , Chen Ziyong , Nie Zuoren . Effects of B and Y Additions on the Microstructure and Tensile Behaviour of High-Nb TiAl Alloys . | RARE METAL MATERIALS AND ENGINEERING , 2021 , 50 (8) , 2760-2764 . |
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摘要 ：
2D forging processes are adopted to tailor the microstructures and mechanical properties of near ? titanium alloys with different boron contents and the evolutions of the microstructures and mechanical properties of the acquired alloys are carefully characterised. Maximum texture intensities decrease with increasing boron contents, thereby illustrating the improvements in the homogeneity of the microstructures. The distribution of TiB whiskers in the 3D space exhibits a near-columnar arrangement around boundaries of squashed and elongated prior 13 grains along the stretching direction. Increases in the contents of equiaxed ? grains with increasing TiB contents are ascribed to enhancements in recrystallisation due to the promotion effects of the TiB phase and increases in 13 transus temperatures. Boron exhibits excellent refinement effects on the alloy matrices, and the refinement degree increases with increasing boron contents. The proportions of low-angle grain boundaries decrease whilst the corresponding proportions of high-angle grain boundaries increase with increasing boron contents. The ultimate and yield strengths of the alloys increase at room temperature (RT) and 650 ?C. Elongations exhibit a decreasing trend at RT but are maintained at 650 ?C. At RT, cleavage fractures of the TiB whiskers determine the evolution law of elongation. The fracture characteristics of alloy matrices exhibit a transformation from a mixture of tearing lamellae and dimples to dimples only. At 650 ?C, the alloy matrices are characterised by ductile fractures with numerous dimples. Er containing particles facilitate the fracture of alloy through cooperative effects with TiB whiskers.
关键词 ：
2D forging Textures Mechanical properties Fracture behaviors Er containing particles 2D forging Textures Mechanical properties Fracture behaviors Er containing particles
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| GB/T 7714 | Ma, Xiaozhao , Xiang, Zhilei , Li, Jihao et al. Influence of 2D forging processes and boron contents on the microstructures and mechanical properties of near ? titanium alloys [J]. | INTERMETALLICS , 2021 , 133 . |
| MLA | Ma, Xiaozhao et al. "Influence of 2D forging processes and boron contents on the microstructures and mechanical properties of near ? titanium alloys" . | INTERMETALLICS 133 (2021) . |
| APA | Ma, Xiaozhao , Xiang, Zhilei , Li, Jihao , Chen, Ziyong , Shu, Qun . Influence of 2D forging processes and boron contents on the microstructures and mechanical properties of near ? titanium alloys . | INTERMETALLICS , 2021 , 133 . |
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摘要 ：
研究了B和Y对Ti45Al8Nb0.2W0.25Cr (at%)合金的微观结构、微观偏析和拉伸行为的影响。结果表明,高铌Ti Al合金中的β相稳定元素促进了微观偏析区域中γ相以及大块状微观偏析区域的形成。具有低比表面积的大块状微偏析区域降低了微偏析界面处的空洞和裂纹的成核率,明显降低了晶界处的强度和合金的抗拉强度。B和Y的添加明显的细化了片层团,增加了片层团处空洞成核的机会,从而提高了变形抗力。分析了2种合金的拉伸机理。
关键词 ：
TiAl TiAl 微观偏析 微观偏析 组织 组织 拉伸 拉伸
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| GB/T 7714 | 宫子琪 , 武晋 , 孙伟 et al. B和Y对高铌TiAl合金组织和拉伸性能的影响（英文） [J]. | 稀有金属材料与工程 , 2021 , 50 (08) : 2760-2764 . |
| MLA | 宫子琪 et al. "B和Y对高铌TiAl合金组织和拉伸性能的影响（英文）" . | 稀有金属材料与工程 50 . 08 (2021) : 2760-2764 . |
| APA | 宫子琪 , 武晋 , 孙伟 , 陈子勇 , 聂祚仁 . B和Y对高铌TiAl合金组织和拉伸性能的影响（英文） . | 稀有金属材料与工程 , 2021 , 50 (08) , 2760-2764 . |
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摘要 ：
Ti-6.5Al-2.5Sn-9Zr-0.5Mo-0.25Si-1Nb-1W-0.1Er-xB (x = 0, 0.1, 0.2, 0.4, 0.6 and 0.8 wt%) with different boron contents are fabricated for investigation. Influences of boron element and its amounts on phase constitutions, microstructures, textures and compression mechanical properties are carefully studied. With the increasing boron additions, contents of TiB phase increase, and the maximum intensities of textures decrease. Microstructures are significantly and continuously refined after adding boron element and with the increasing boron additions, and turning point of refinement rates for different microstructural parameters is found at 0.2 wt% boron content. Strengths increase monotonously, while elongations increase firstly and decrease afterwards. The maximum value of elongation is acquired at boron content of 0.2 wt%. On the premise of ensuring plasticity, 0.2 wt% boron content is the most appropriate amount for microstructural refinement and mechanical properties enhancement for current near alpha titanium alloys. Meanwhile, aspect ratios of TiB whiskers increase with the increasing boron contents. Lots of near equiaxed alpha grains or alpha grains with irregular morphologies are discovered around TiB phase. Distorted and twisted alpha grain boundaries are also obviously detected in boron containing alloys. Moreover, premature fracture of alloys containing TiB whiskers is largely influenced by the fracture of these brittle reinforcements. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词 ：
Fracture behaviors Fracture behaviors Near alpha titanium alloy Near alpha titanium alloy Boron element Boron element Textures Textures Microstructures Microstructures Mechanical properties Mechanical properties
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| GB/T 7714 | Ma, Xiaozhao , Xiang, Zhilei , Tan, Chao et al. Influences of boron contents on microstructures and mechanical properties of as-casted near alpha titanium alloy [J]. | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2021 , 77 : 1-18 . |
| MLA | Ma, Xiaozhao et al. "Influences of boron contents on microstructures and mechanical properties of as-casted near alpha titanium alloy" . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 77 (2021) : 1-18 . |
| APA | Ma, Xiaozhao , Xiang, Zhilei , Tan, Chao , Wang, Zhitian , Liu, Yingying , Chen, Ziyong et al. Influences of boron contents on microstructures and mechanical properties of as-casted near alpha titanium alloy . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2021 , 77 , 1-18 . |
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