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学者姓名：高坤元
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Abstract ：
采用SEM、EDS等手段研究了铝侧添加Sc元素对Al/Fe复合界面金属间化合物的生长、种类及组织形貌的影响.结果表明,冷轧复合的Al/Fe复合板在475～640℃退火1 h后均产生了连续的界面化合物,在560℃及以下时,金属间化合物厚度变化趋势基本一致,在560 ℃以上时,含Sc的复合板界面金属间化合物增长趋势明显变缓,厚度大幅降低,这表明Al侧添加Sc元素不能完全抑制界面金属间化合物的产生.同时,Sc元素的添加并未改变界面化合物的种类及分布,界面化合物从Al侧到Fe侧依次为FeAl3、Fe2Al5、FeAl.在475℃时,Fe侧Fe2Al5相呈细小的锯齿状形貌,但整体十分平整,在580℃时,Fe侧Fe2Al5相呈粗大"指状"形貌,起伏较大.
Keyword ：
微合金化 微合金化 金属间化合物 金属间化合物 铝/铁复合 铝/铁复合
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| GB/T 7714 | 王振 , 高坤元 , 张小军 et al. Sc对Al/Fe层状复合材料界面化合物生长行为的影响 [J]. | 金属热处理 , 2024 , 49 (1) : 84-90 . |
| MLA | 王振 et al. "Sc对Al/Fe层状复合材料界面化合物生长行为的影响" . | 金属热处理 49 . 1 (2024) : 84-90 . |
| APA | 王振 , 高坤元 , 张小军 , 聂祚仁 , 黄晖 , 吴晓蓝 . Sc对Al/Fe层状复合材料界面化合物生长行为的影响 . | 金属热处理 , 2024 , 49 (1) , 84-90 . |
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Abstract ：
将过共晶AlSc15 合金加热至液态,以10℃/h速率冷却得到毫米级尺寸的Al3 Sc金属间化合物.利用微区电化学和扫描开尔文探针力显微镜(SKPFM)研究了Al3 Sc金属间化合物在不同pH值的 0.1 mol/L NaCl溶液中的电化学特征及对局部腐蚀敏感性的影响.结果表明,Al3 Sc金属间化合物存在自钝化现象,且在碱性环境中有明显的维钝区域;随着pH值的增加,Al3 Sc腐蚀电位逐渐降低,在中性和碱性条件下的腐蚀速率明显低于酸性条件下的;Al3 Sc金属间化合物与周围铝基体之间的伏打电位差约为40 mV,在铝合金中可能作为较弱的局部阴极,对电偶腐蚀的影响不大.
Keyword ：
局部腐蚀 局部腐蚀 扫描开尔文 扫描开尔文 Al3Sc金属间化合物 Al3Sc金属间化合物 微电化学技术 微电化学技术
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| GB/T 7714 | 蒋伟 , 高坤元 , 胡秀华 et al. AlSc15中间合金中Al3Sc金属间化合物的电化学行为及对局部腐蚀的影响 [J]. | 轻合金加工技术 , 2024 , 52 (2) : 54-58 . |
| MLA | 蒋伟 et al. "AlSc15中间合金中Al3Sc金属间化合物的电化学行为及对局部腐蚀的影响" . | 轻合金加工技术 52 . 2 (2024) : 54-58 . |
| APA | 蒋伟 , 高坤元 , 胡秀华 , 文胜平 , 黄晖 , 吴晓蓝 et al. AlSc15中间合金中Al3Sc金属间化合物的电化学行为及对局部腐蚀的影响 . | 轻合金加工技术 , 2024 , 52 (2) , 54-58 . |
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Abstract ：
Upon 98% reduction cold-rolling, a single layer AA3003 foil material of 115 mu m thick was intermediately annealed at 300-420 degrees C/1-8 h, and the preferred temperature and time of the intermediate annealing for the laminated AA4343/AA3003/AA4343 composite foil material were determined. All of these samples were cold rolled by 40% to 70 mu m thick and finally annealed at a temperature in the range of 300-550 degrees C for 1-9 h. Their sagging resistance and microstructure were investigated using simulated brazing treatment, optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). For the single layer AA3003 foil, the sagging distance decreased first and then increased with increasing intermediate annealing temperature, and the lowest sagging distance corresponds to the coarsest grain in the recrystallized sample. After the final annealing for the single layer, the sagging distance decreased monotonously. For the laminated foil subjected to the final annealing, the sagging distance curves decreased first and then increased with increasing annealing temperature and time. The improvement of sagging resistance was attributed to the recovery of two types of materials during annealing process. The deterioration of the sagging resistance in the laminated foils was due to the corrosion in the brazing process, resulted from the Si diffusion from the cladding layer into the core layer. It is the coarse grains, few dislocations and minimal diffusion of Si that are crucial for improving the sagging resistance of the laminated foils.
Keyword ：
Laminated composite foil Laminated composite foil Aluminum alloy Aluminum alloy Corrosion Corrosion Sagging resistance Sagging resistance Annealing process Annealing process
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| GB/T 7714 | Wang, Jianzhu , Gao, Kunyuan , Xiong, Xiangyuan et al. The influence of annealing process on the sagging resistance of AA3003 foil and laminated AA4343/AA3003/AA4343 composite foil materials [J]. | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2024 , 32 : 3573-3581 . |
| MLA | Wang, Jianzhu et al. "The influence of annealing process on the sagging resistance of AA3003 foil and laminated AA4343/AA3003/AA4343 composite foil materials" . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 32 (2024) : 3573-3581 . |
| APA | Wang, Jianzhu , Gao, Kunyuan , Xiong, Xiangyuan , Zhang, Yue , Ding, Yusheng , Wu, Xiaolan et al. The influence of annealing process on the sagging resistance of AA3003 foil and laminated AA4343/AA3003/AA4343 composite foil materials . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2024 , 32 , 3573-3581 . |
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Abstract ：
The influence of grain size on the corrosion behavior of pure aluminum and the defect density and diffusion coefficient of surface passive films were investigated using electron backscatter diffraction (EBSD) and electrochemical testing techniques, based on the point defect model (PDM). Samples with three different grain sizes (23 +/- 11, 134 +/- 52, and 462 +/- 203 mu m) were obtained by annealing at different temperatures and times. The polarization curves and electrochemical impedance spectroscopy results for the pure aluminum in the 3.5% NaCl solution showed that with decreasing grain size, the corrosion current (icorr) decreased monotonously, giving rise to a noble corrosion potential and a large polarization resistance. The Motte-Schottky results showed that the passive films that formed on pure aluminum with fine grains of 23 +/- 11 mu m had a low density (3.82 x 1020 cm-3) of point defects, such as oxygen vacancies and/or metal interstitials, and a small diffusion coefficient (1.94 x 10-17 cm2/s). The influence of grain size on corrosion resistance was discussed. This work demonstrated that grain refinement could be an effective approach to achieving high corrosion resistance of passive metals.
Keyword ：
pure aluminum pure aluminum formation potential formation potential grain size grain size diffusion coefficient diffusion coefficient passive film passive film
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| GB/T 7714 | Hu, Xiuhua , Gao, Kunyuan , Xiong, Xiangyuan et al. Influence of Grain Size and Film Formation Potential on the Diffusivity of Point Defects in the Passive Film of Pure Aluminum in NaCl Solution [J]. | METALS , 2024 , 14 (7) . |
| MLA | Hu, Xiuhua et al. "Influence of Grain Size and Film Formation Potential on the Diffusivity of Point Defects in the Passive Film of Pure Aluminum in NaCl Solution" . | METALS 14 . 7 (2024) . |
| APA | Hu, Xiuhua , Gao, Kunyuan , Xiong, Xiangyuan , Huang, Hui , Wu, Xiaolan , Wen, Shengping et al. Influence of Grain Size and Film Formation Potential on the Diffusivity of Point Defects in the Passive Film of Pure Aluminum in NaCl Solution . | METALS , 2024 , 14 (7) . |
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Abstract ：
The effects of a minor Zn addition on the mechanical and corrosion properties and microstructure of a high Mg content AlMg alloy containing Er and Zr in the warm-rolled state were studied using tensile test, nitric acid mass loss test (NAMLT), exfoliation corrosion susceptibility test (ASSET), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. The tensile test results showed that the 0.58 wt% Zn addition to the Al-Mg-Er-Zr alloy increased the yield strength from 297 to 351 MPa and tensile strength from 416 to 445 MPa, but decreased the elongation from 13.3 % to 12.5 %. The NAMLT and ASSET results showed that the two warm rolled alloys were initially in the stabilization state, but the Al-Mg-Er-Zr alloy without Zn added became sensitized severely after the accelerated sensitization annealing (ASA) at 100 degrees C. The Zn addition improved the intergranular corrosion (IGC) resistance and exfoliation corrosion (EC) resistance significantly. The TEM results showed that, for the Al-Mg-Er-Zr alloy, there were Al-3(Er,Zr) phase particles in the matrix and beta (Al3Mg2) phase particles separated from each other at the grain boundary. After the ASA treatment, more beta phase particles were precipitated and covered the grain boundary completely. For the Al-Mg-Zn-Er- Zr alloy, another nanoscale T (Al-32(Mg, Zn)(49)) phase was precipitated in the matrix, and there were no grain boundary phase particles observed at the grain boundary, because the precipitation of T phase consumed the supersaturated Mg in the matrix, thus suppressing the formation of grain boundary phase particles during the ASA treatment and resulting in a good corrosion resistance. The strengthening effect of the Zn addition was mainly due to the formation of T phase particles during the warm rolling process.
Keyword ：
Microalloying Microalloying Mechanical property Mechanical property Aluminum-magnesium alloy Aluminum-magnesium alloy Corrosion property Corrosion property Microstructure Microstructure
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| GB/T 7714 | Wang, Jianzhu , Gao, Kunyuan , Xiong, Xiangyuan et al. The influence of Zn addition on the microstructure and mechanical and corrosion properties of warm rolled Al-Mg alloys containing Er and Zr [J]. | MATERIALS CHARACTERIZATION , 2024 , 217 . |
| MLA | Wang, Jianzhu et al. "The influence of Zn addition on the microstructure and mechanical and corrosion properties of warm rolled Al-Mg alloys containing Er and Zr" . | MATERIALS CHARACTERIZATION 217 (2024) . |
| APA | Wang, Jianzhu , Gao, Kunyuan , Xiong, Xiangyuan , Li, Lin , Wu, Xiaolan , Wen, Shengping et al. The influence of Zn addition on the microstructure and mechanical and corrosion properties of warm rolled Al-Mg alloys containing Er and Zr . | MATERIALS CHARACTERIZATION , 2024 , 217 . |
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Abstract ：
The Al-Mn alloy heat exchanger fin production process includes a brazing treatment at s high temperature of 600 degrees C, in which coarse grains are preferred for their high resistance to deformation at elevated temperatures by decreasing the grain boundary sliding. In this study, Al-1.57Mn-1.57Zn-0.58Si-0.17Fe alloy foils cold rolled by 81.7% (1.1 mm in thickness) and 96.5% (0.21 mm in thickness) were annealed at 100-550 degrees C for 1 h to investigate their recrystallization behavior, grain sizes, and precipitates by increasing the annealing temperature, using micro-hardness measurement, electron back-scattered diffraction (EBSD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) techniques. The micro-hardness results showed that the recrystallization finishing temperatures for the two samples were almost the same, 323 +/- 2 degrees C. The EBSD results showed that when the annealing temperature decreased from 550 to 400 degrees C, the recrystallized grain sizes of the two samples were nearly identical-both increased slightly. Further decreasing the annealing temperature from 400 to 330 degrees C caused the grain sizes to increase more, with the thinner foil sample having a more significant increase. The SEM and TEM observations showed that the micron-sized primary-phase remained unchanged during the annealing process. The nano-sized secondary phase precipitates formed during the hot-rolling process experienced a coarsening and dissolving process upon annealing. The particle size of the secondary phase increased from 32 nm to 44 nm and the area fraction decreased from 4.2% to 3.8%. The nucleation analysis confirmed that the large primary-phase could act as a nucleation site through particle stimulated nucleation (PSN) mode. The relatively dense secondary phase precipitates with small sizes at lower temperatures could provide higher Zener drag to the grain boundaries, leading to fewer nuclei and thereafter coarser grains. The coarsening of the recrystallized grains in the foils could be implemented through thickness reduction and/or precipitation processes to form densely distributed nano-sized precipitates.
Keyword ：
recrystallization recrystallization particle stimulated nucleation particle stimulated nucleation Zener drag Zener drag Al-Mn alloys Al-Mn alloys grain size grain size
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| GB/T 7714 | Wang, Jianzhu , Gao, Kunyuan , Xiong, Xiangyuan et al. The Influence of Precipitated Particles on the Grain Size in Cold-Rolled Al-Mn Alloy Foils upon Annealing at 100-550 °C [J]. | MATERIALS , 2024 , 17 (7) . |
| MLA | Wang, Jianzhu et al. "The Influence of Precipitated Particles on the Grain Size in Cold-Rolled Al-Mn Alloy Foils upon Annealing at 100-550 °C" . | MATERIALS 17 . 7 (2024) . |
| APA | Wang, Jianzhu , Gao, Kunyuan , Xiong, Xiangyuan , Zhang, Yue , Ding, Yusheng , Wang, Jingtao et al. The Influence of Precipitated Particles on the Grain Size in Cold-Rolled Al-Mn Alloy Foils upon Annealing at 100-550 °C . | MATERIALS , 2024 , 17 (7) . |
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Abstract ：
一种激光粉末床熔合技术制备高强度Al‑Si‑Mg合金的方法，属于增材制造材料领域。包含S1：Al‑Si‑Mg合金粉末成分设计；S2：筛分Al‑Si‑Mg合金粉末；S3：Al‑Si‑Mg合金粉末干燥处理；S4 : 成型参数设计；本发明通过Er、Zr微合金化并且调控Si、Mg含量，优化LPBF成型参数，细化胞晶尺寸。提高了LPBF制备Al‑Si‑Mg合金的应变硬化能力，屈服强度可以达到370MPa以上。
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| GB/T 7714 | 魏午 , 毕舰镭 , 黄晖 et al. 一种激光粉末床熔合技术制备高强度Al-Si-Mg合金的方法 : CN202310409560.1[P]. | 2023-04-17 . |
| MLA | 魏午 et al. "一种激光粉末床熔合技术制备高强度Al-Si-Mg合金的方法" : CN202310409560.1. | 2023-04-17 . |
| APA | 魏午 , 毕舰镭 , 黄晖 , 亓鹏 , 荣莉 , 吴晓蓝 et al. 一种激光粉末床熔合技术制备高强度Al-Si-Mg合金的方法 : CN202310409560.1. | 2023-04-17 . |
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Abstract ：
复合添加Er、Zr的超高强Al‑Zn‑Mg‑Cu合金及制备工艺，成分是Zn7.4～8.1wt.％、Mg 2.2～2.6wt.％、Cu 0.8～1.2wt.％％、Mn 0.2～0.5wt.％、Er0.02～0.20wt.％、Zr 0.05～015wt.％，余量为Al及不可避免的杂质。采用纯铝、纯锌、纯镁、Cu板、Al‑Mn、Al‑Zr、Al‑Er配料；Mg、Cu、Zn以纯金属形式加入，Zr、Er以中间合金形式加入，完成铸锭熔炼。为消除铸态组织偏析，提高合金组织均匀性，同时促进合金中Al3(Er, Zr)粒子弥散析出，进行三级均匀化处理：350℃/8h+420℃/4h+480℃/8h；450℃挤压为厚壁管材；为析出相弥散析出，进行470℃/2h固溶处理，水冷，提高合金过饱和程度；120℃/16h+180℃/Xmin+120℃/20h、120℃/16h+190℃/Xmin+120℃/20h三级回归再时效。三级回归再时效处理保证合金强度且改善合金抗腐蚀性能。
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| GB/T 7714 | 吴晓蓝 , 杨太辉 , 文胜平 et al. 复合添加Er、Zr的超高强Al-Zn-Mg-Cu合金及制备工艺 : CN202310228661.9[P]. | 2023-03-03 . |
| MLA | 吴晓蓝 et al. "复合添加Er、Zr的超高强Al-Zn-Mg-Cu合金及制备工艺" : CN202310228661.9. | 2023-03-03 . |
| APA | 吴晓蓝 , 杨太辉 , 文胜平 , 高坤元 , 魏午 , 黄晖 et al. 复合添加Er、Zr的超高强Al-Zn-Mg-Cu合金及制备工艺 : CN202310228661.9. | 2023-03-03 . |
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Abstract ：
一种提高铝合金叠层复合板抗冲击性能的时效工艺，属于有色金属技术领域，对两种Zn、Mg含量差别较大的叠层复合板轧制，得到叠层复合板的总厚度为5.0mm, 其中Al‑7.0Zn‑3.0Mg合金的厚度为4.07mm，Al‑4.4Zn‑2.3Mg合金厚度为0.93mm，然后对复合板进行470℃/1h的统一固溶处理，进一步进行统一时效处理，时效工艺为105～110℃保温36～60h，本发明所得叠层复合板具有高的抗冲击强度和良好的冲击韧性。
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| GB/T 7714 | 高坤元 , 窦义武 , 闵范磊 et al. 一种提高铝合金叠层复合板抗冲击性能的时效工艺 : CN202310272434.6[P]. | 2023-03-17 . |
| MLA | 高坤元 et al. "一种提高铝合金叠层复合板抗冲击性能的时效工艺" : CN202310272434.6. | 2023-03-17 . |
| APA | 高坤元 , 窦义武 , 闵范磊 , 聂祚仁 , 黄晖 , 文胜平 et al. 一种提高铝合金叠层复合板抗冲击性能的时效工艺 : CN202310272434.6. | 2023-03-17 . |
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Abstract ：
一种Zn、Er、Zr复合微合金化AlMgMn合金的双级均匀化退火工艺，属于有色金属技术领域。其有以下合金成分5.82％Mg、0.18％Er、0.12％Zr、0.69％Mn、0.58％Zn，其余含量为纯铝。经325℃/(2‑10h)低温析出退火后，再进行420‑430℃/24h的高温均匀化退火。其中，最优的双级均匀化工艺为325℃/8h+430℃/24h。该工艺在达到均匀化目的的同时，使得第二相粒子在低温均匀弥散析出，提高了合金的力学性能，并为后续的热处理工艺奠定了基础。
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| GB/T 7714 | 高坤元 , 李琳 , 王剪烛 et al. 一种Zn、Er、Zr复合微合金化AlMgMn合金的双级均匀化退火工艺 : CN202310263794.X[P]. | 2023-03-17 . |
| MLA | 高坤元 et al. "一种Zn、Er、Zr复合微合金化AlMgMn合金的双级均匀化退火工艺" : CN202310263794.X. | 2023-03-17 . |
| APA | 高坤元 , 李琳 , 王剪烛 , 路易 , 聂祚仁 , 黄晖 et al. 一种Zn、Er、Zr复合微合金化AlMgMn合金的双级均匀化退火工艺 : CN202310263794.X. | 2023-03-17 . |
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