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学者姓名：文胜平
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Abstract ：
The effects of Sc, Mg and Si elements in an Al-Cu alloy have been studied by means of hardness tests and transmission electron microscopy analysis. The experimental results show that additions of Sc, Mg and Si can improve the heat resistance of the Al-Cu alloy. The Sc/Mg/Si segregation-sandwiched structure is the most stable, when compared with Sc segregation or Si/Sc co-segregation at the interface of theta '/Al. The additions of Si and Mg promote the aging-hardening response of the Al-Cu alloy. Mg is a micro-alloying element with great potential in stabilizing the size of theta ' phases, which further promotes the number density greatly. Consequently, the Al-Cu alloy achieves a high strength, matched with excellent thermal stability, due to the microalloying of Sc/Mg/Si solutes.
Keyword ：
structure structure Al-Cu alloy Al-Cu alloy segregation segregation theta ' phases theta ' phases heat resistance heat resistance
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| GB/T 7714 | Liang, Shangshang , Wen, Shengping , Liu, Baosheng et al. Stabilization Effect of Interfacial Solute Segregation on θ′ Precipitates in Al-Cu Alloys [J]. | METALS , 2024 , 14 (8) . |
| MLA | Liang, Shangshang et al. "Stabilization Effect of Interfacial Solute Segregation on θ′ Precipitates in Al-Cu Alloys" . | METALS 14 . 8 (2024) . |
| APA | Liang, Shangshang , Wen, Shengping , Liu, Baosheng , Hu, Yong , Wei, Wu , Wu, Xiaolan et al. Stabilization Effect of Interfacial Solute Segregation on θ′ Precipitates in Al-Cu Alloys . | METALS , 2024 , 14 (8) . |
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Abstract ：
Rare earth elements and transition elements are widely used in aluminum alloys, magnesium alloys and copper alloys due to their unique microalloying effects. With regard to in-depth research on the grain refinement characteristics of rare earth elements and transition elements, the combination of grain refinement and microalloying in the master alloys has a great impact on the theories and technical research of refinement, and the broadening of the application field of master alloys. This paper first summarizes the grain refinement mechanisms and analyzes the effects of rare earth elements and transition elements on the grain refinement of aluminum and aluminum alloys, and summarizes the elements suitable for the preparation of Al-M master alloys and their refinement mechanism.
Keyword ：
heterogeneous nucleation heterogeneous nucleation grain refinement grain refinement Sc Sc edge to edge matching model edge to edge matching model microalloying microalloying aluminum alloys aluminum alloys Zr Zr
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| GB/T 7714 | Lei, Zhiguo , Wen, Shengping , Huang, Hui et al. Grain Refinement of Aluminum and Aluminum Alloys by Sc and Zr [J]. | METALS , 2023 , 13 (4) . |
| MLA | Lei, Zhiguo et al. "Grain Refinement of Aluminum and Aluminum Alloys by Sc and Zr" . | METALS 13 . 4 (2023) . |
| APA | Lei, Zhiguo , Wen, Shengping , Huang, Hui , Wei, Wu , Nie, Zuoren . Grain Refinement of Aluminum and Aluminum Alloys by Sc and Zr . | METALS , 2023 , 13 (4) . |
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Abstract ：
The temporal evolution of microhardness and Al-3(Er,Zr/Hf) precipitates are investigated in Al-Er-Zr/Hf alloys during annealing at 450 degrees C and 500 degrees C. The microhardness of the alloys decreases continuously with the prolonged annealing time due to the coarsening of the precipitates. Different weakening amplitudes are observed because of the disparity of the precipitate coarsening rate that is related to the disparity in their intrinsic diffusivities of Er, Zr, and Hf solute atoms in an Al matrix. The addition of Hf element is beneficial to enhancing the coarsening resistance, thus improving the thermal stability of the alloys. Introducing such elements to improve the thermal stability of precipitates can provide a new idea or choice for the development of heat-resistant aluminum alloys.
Keyword ：
microhardness microhardness thermal stability thermal stability Hf alloys Hf alloys diffusion diffusion precipitate precipitate Al-Er-Zr Al-Er-Zr
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| GB/T 7714 | Wu, Hao , Zhang, Qi , Li, Li et al. Thermal Stability of the Precipitates in Dilute Al-Er-Zr/Hf Alloys at Elevated Temperature [J]. | METALS , 2022 , 12 (8) . |
| MLA | Wu, Hao et al. "Thermal Stability of the Precipitates in Dilute Al-Er-Zr/Hf Alloys at Elevated Temperature" . | METALS 12 . 8 (2022) . |
| APA | Wu, Hao , Zhang, Qi , Li, Li , Huang, Mingdong , Zheng, Zhikai , Wen, Shengping . Thermal Stability of the Precipitates in Dilute Al-Er-Zr/Hf Alloys at Elevated Temperature . | METALS , 2022 , 12 (8) . |
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Abstract ：
The interaction of precipitation and recrystallization in the cold rolled Al-Er and Al-Er-Zr alloys was investigated. The results indicate that homogeneous precipitation of Al3Er starts before recrystallization in Al-Er alloy. Precipitation formed before the recrystallization leads to precipitation hardening in early stage of annealing. At the same time it also retards recrystallization. The kinetics of homogeneous precipitation in Al-Er-Zr alloy is sluggish compared to that in the Al-Er alloy, but the formation of heterogeneous nucleated precipitation on subgrain boundaries and dislocations prevents recrystallization. The effect of heterogeneous precipitation on hardness increase is not greater than that of recovery/recrystallization on hardness decrease during early stage of annealing, so there's no significant increase in hardness for cold-rolled Al-Er-Zr alloy.
Keyword ：
aluminum alloys aluminum alloys recrystallization recrystallization precipitation precipitation Al-Er-Zr Al-Er-Zr
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| GB/T 7714 | Liang, S. S. , Wen, S. P. , Wu, X. L. et al. Interaction of Precipitation and Recrystallization in Cold-Rolled Al-Er and Al-Er-Zr Alloys [J]. | PHYSICS OF METALS AND METALLOGRAPHY , 2021 , 122 (13) : 1350-1357 . |
| MLA | Liang, S. S. et al. "Interaction of Precipitation and Recrystallization in Cold-Rolled Al-Er and Al-Er-Zr Alloys" . | PHYSICS OF METALS AND METALLOGRAPHY 122 . 13 (2021) : 1350-1357 . |
| APA | Liang, S. S. , Wen, S. P. , Wu, X. L. , Gao, K. Y. , Huang, H. , Li, B. L. et al. Interaction of Precipitation and Recrystallization in Cold-Rolled Al-Er and Al-Er-Zr Alloys . | PHYSICS OF METALS AND METALLOGRAPHY , 2021 , 122 (13) , 1350-1357 . |
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Abstract ：
The aging hardening behaviors of Al-0.12Sc and Al-0.12Sc-0.2Zr (wt.%) alloys with the addition of Si range from 0.05 wt% to 0.3 wt% were investigated by microhardness and transmission electron microscopy. The results indicate that content of similar to 0.15% Si is optimal and Sc-Si clusters forming at the early ageing stage hinder the evolution process of Al3Sc. Upon aging isochronally, Al-Sc-(Zr)-Si alloy shows two stages hardening. The first strengthen stage occurs because of the formation of Sc-Si clusters, and peak hardness of the second stage owes to (Al,Si)(3)Sc evolving from the clusters. During aging isothermally at 275 degrees C, Al-Sc-Si and Al-Sc-Zr-Si show similar hardening characteristics. But ageing at 225 degrees C, the Sc-Si clusters are relatively stable, the second stage increase in the Al-Sc-(0.15, 0.3%)Si alloys have no appearance. Clustering behavior of Sc and Si does not be changed by the addition of Zr. The Al-Sc-Zr-Si alloy exhibits better thermal stability. Because partition of Zr to the preceding formed (Al,Si)(3)Sc reduces the coarsening rate of the precipitates. (C) 2020 Elsevier B.V. All rights reserved.
Keyword ：
Clustering Clustering Precipitation Precipitation Aging hardening Aging hardening
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| GB/T 7714 | Liang, S. S. , Wen, S. P. , Xu, J. et al. The in fluence of Sc-Si clusters on aging hardening behavior of dilute Al-Sc-(Zr)-(Si) alloy [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2020 , 842 . |
| MLA | Liang, S. S. et al. "The in fluence of Sc-Si clusters on aging hardening behavior of dilute Al-Sc-(Zr)-(Si) alloy" . | JOURNAL OF ALLOYS AND COMPOUNDS 842 (2020) . |
| APA | Liang, S. S. , Wen, S. P. , Xu, J. , Wu, X. L. , Gao, K. Y. , Huang, H. et al. The in fluence of Sc-Si clusters on aging hardening behavior of dilute Al-Sc-(Zr)-(Si) alloy . | JOURNAL OF ALLOYS AND COMPOUNDS , 2020 , 842 . |
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| GB/T 7714 | Liang, S. S. , Wen, S. P. , Wu, X. L. et al. The synergetic effect of Si and Sc on the thermal stability of the precipitates in AlCuMg alloy (vol 783, 139319, 2020) [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2020 , 786 . |
| MLA | Liang, S. S. et al. "The synergetic effect of Si and Sc on the thermal stability of the precipitates in AlCuMg alloy (vol 783, 139319, 2020)" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 786 (2020) . |
| APA | Liang, S. S. , Wen, S. P. , Wu, X. L. , Huang, H. , Gao, K. Y. , Nie, Z. R. . The synergetic effect of Si and Sc on the thermal stability of the precipitates in AlCuMg alloy (vol 783, 139319, 2020) . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2020 , 786 . |
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Abstract ：
The hot deformation behavior of Al-0.04Er-0.08Zr alloy was investigated by hot compression tests in the temperature range from 200 degrees C to 450 degrees C. True stress-true strain curves were analyzed by linear fitting using Arrhenius-type equation, and deformation microstructure was studied by TEM. The results indicate that dynamic recovery is the dominated softening mechanism for both the solutionized and the aged sample during hot compression. Hot deformation especially at high temperature and low strain rate induces rapid precipitation in the solutionized samples. Dynamic precipitation apparently leads to the increase of the flow stress of the solutionized samples during hot compression process, but does not effectively enhance the microhardness of the deformed samples. The dynamic precipitation also leads to deviations of the Arrhenius-type fitting of the stress-strain curves.
Keyword ：
Erbium Erbium dynamic precipitation dynamic precipitation Zirconium Zirconium aluminum alloy aluminum alloy hot compression hot compression
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| GB/T 7714 | Yuan Xiaoming , Wen Shengping , Hou Jie et al. Hot Deformation Behavior and Dynamic Precipitation in Al-Er-Zr Alloy [J]. | RARE METAL MATERIALS AND ENGINEERING , 2020 , 49 (7) : 2305-2313 . |
| MLA | Yuan Xiaoming et al. "Hot Deformation Behavior and Dynamic Precipitation in Al-Er-Zr Alloy" . | RARE METAL MATERIALS AND ENGINEERING 49 . 7 (2020) : 2305-2313 . |
| APA | Yuan Xiaoming , Wen Shengping , Hou Jie , Wu Xiaolan , Li Bolong , Gao Kunyuan et al. Hot Deformation Behavior and Dynamic Precipitation in Al-Er-Zr Alloy . | RARE METAL MATERIALS AND ENGINEERING , 2020 , 49 (7) , 2305-2313 . |
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Abstract ：
The effect of Si and Sc on the evolution of the precipitates during aging in Al4.0Cu0.5 Mg alloys was investigated by means of microhardness tests and transmission electron microscope. The results show that Si can significantly refine the size of theta' phases, because addition of Si introduces a considerable amount of small, uniformly dispersed Al-Cu-Mg-Si (Q) quaternary phases, which provides nucleation sites for the theta' phases. Sc atoms segregate at the interfaces between the matrix and the theta'-Al2Cu precipitates in AlCuMgSiSc alloy. The segregation of Sc atoms inhibits the growth of the theta' phases and improves the thermal stability of the theta' phases. At the same time, the segregation of Sc atoms in Q phases restrains the coarsening of the Q phases, which also contributes to the thermal stability of the theta' phases. The co-addition of Si and Sc thus leads to a combination of high strength and high thermal stability of the Al-Cu-Mg-Si-Sc alloy.
Keyword ：
Segregation Segregation AlCuMg AlCuMg Precipitate Precipitate Thermal stability Thermal stability Sc Sc
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| GB/T 7714 | Liang, S. S. , Wen, S. P. , Wu, X. L. et al. The synergetic effect of Si and Sc on the thermal stability of the precipitates in AlCuMg alloy [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2020 , 783 . |
| MLA | Liang, S. S. et al. "The synergetic effect of Si and Sc on the thermal stability of the precipitates in AlCuMg alloy" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 783 (2020) . |
| APA | Liang, S. S. , Wen, S. P. , Wu, X. L. , Huang, H. , Gao, K. Y. , Nie, Z. R. . The synergetic effect of Si and Sc on the thermal stability of the precipitates in AlCuMg alloy . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2020 , 783 . |
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Abstract ：
The peak-aged state of Al-Er-Zr/Hf alloy was annealed at 450 ℃ and 500 ℃, and the high temperature coarsening behavior of precipitated phase in the Al-Er-Zr/Hf alloy was discussed.The results show that after annealing at 450 ℃, the hardness of the Al-Er-Zr/Hf alloy decreases obviously, while the electrical conductivity decreases first and then increases, and the electrical conductivity of the Al-Er-Zr/Hf alloy annealed at 450 ℃ for 100 h is higher than that of the peak aged state. The variation of the hardness and electrical conductivity of the alloy annealed at 500 ℃ are similar to those of the alloy annealed at 450 ℃, but the electrical conductivity of the alloy annealed at 500 ℃ for 100 h is lower than that before annealing at 500 ℃ for 100 h. The size of precipitated phase is observed by TEM. The coarsening process of precipitated phase in the Al-Er-Zr/Hf alloys accords with LSW theory, and it is mainly controlled by the atomic diffusion of Zr and Hf. The addition of Hf element can reduce the the coarsening rate of the precipitated phase at high temperature, and the effect is more obvious with more Hf content. © 2018, Editorial Office of Transactions of Materials and Heat Treatment. All right reserved.
Keyword ：
Aging; Al-Er-Zr/Hf alloys; Coarsening; Precipitate phase Aging; Al-Er-Zr/Hf alloys; Coarsening; Precipitate phase
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| GB/T 7714 | Xu, J. , Wen, S.-P. , Liu, T.-H. et al. High temperature coarsening behavior of precipitated phase in Al-Er-Zr/Hf alloy [Al-Er-Zr/Hf合金析出相高温粗化行为] [J]. | Transactions of Materials and Heat Treatment , 2018 , 39 (6) : 62-67 . |
| MLA | Xu, J. et al. "High temperature coarsening behavior of precipitated phase in Al-Er-Zr/Hf alloy [Al-Er-Zr/Hf合金析出相高温粗化行为]" . | Transactions of Materials and Heat Treatment 39 . 6 (2018) : 62-67 . |
| APA | Xu, J. , Wen, S.-P. , Liu, T.-H. , Wang, W. , Nie, Z.-R. . High temperature coarsening behavior of precipitated phase in Al-Er-Zr/Hf alloy [Al-Er-Zr/Hf合金析出相高温粗化行为] . | Transactions of Materials and Heat Treatment , 2018 , 39 (6) , 62-67 . |
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Abstract ：
To investigate the effect of cold-rolling and aging on precipitation and recrystallization behavior of Al-0.04Er-0.08Zr (at. %) alloy, two thermo-mechanical processes containing peak aging + cold-rolling (A + CR) and cold-rolling + isochronal aging (CR + A) were studied. In A + CR process, the hardness of alloy under cold-rolled state was much higher than the maximum obtained during isochronal aging, due to the strong interaction between precipitates and dislocations or sub-grain boundaries. Furthermore, the recrystallization temperature was 475 °C as indicated by the hardness curve. The microstructure analysis revealed that the sample annealed at 525 °C for 1 h still don’t recrystallize fully. For CR + A, it turned out that the deformation play a small role in improving the maximum of hardness. But comparing with those without deformation, the existence of deformation accelerated the rate of precipitation process and obtained higher electrical conductivity. © 2017 Trans Tech Publications, Switzerland.
Keyword ：
Metal cladding Metal cladding Ternary alloys Ternary alloys Crystallization Crystallization Cold rolling Cold rolling Aluminum alloys Aluminum alloys Deformation Deformation Erbium alloys Erbium alloys Grain boundaries Grain boundaries Hardness Hardness Zircaloy Zircaloy Recrystallization (metallurgy) Recrystallization (metallurgy) Precipitation (chemical) Precipitation (chemical)
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| GB/T 7714 | Liu, T.H. , Wen, S.P. , Wu, X.L. et al. Combined effect of cold-rolling and aging on precipitation and recrystallization behavior of Al-Er-Zr alloy [C] . 2017 : 310-314 . |
| MLA | Liu, T.H. et al. "Combined effect of cold-rolling and aging on precipitation and recrystallization behavior of Al-Er-Zr alloy" . (2017) : 310-314 . |
| APA | Liu, T.H. , Wen, S.P. , Wu, X.L. , Gao, K.Y. , Huang, H. , Wang, W. et al. Combined effect of cold-rolling and aging on precipitation and recrystallization behavior of Al-Er-Zr alloy . (2017) : 310-314 . |
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