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学者姓名：杨胶溪
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Abstract ：
NiFeMo is prevalently employed in the field of aerospace and electronic devices owing to its excellent soft magnetic properties. Besides, the incorporation of elements through in-situ alloying presents a novel strategy for performance modulation in Selective Laser Melting (SLM), presenting a novel pathway toward the advancement of soft magnetic materials. In this study, (NiFeMo)100-xCrx alloys (x=0 wt%, 0.5 wt%, 1.0 wt%, 1.5 wt%, 2.0 wt%, 2.5 wt%) were prepared utilizing Cr in-situ alloying SLM. The magnetic properties as well as microstructural characterization were conducted by employing X-ray diffraction (XRD), scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), high-resolution transmission electron microscopy (HRTEM) (Tecnai-G2F30), and direct current B-H hysteresis curve testing equipment (MATS-2010S). The results indicate that the microstructure of the SLM-formed NiFeMo alloy through in-situ chromium alloying is predominantly characterized by columnar grains growing along the build direction. With an increase in the in-situ alloying ratio of chromium, the lattice parameters of the FCC phase structure of the NiFeMo alloy decrease from 3.582 & Aring; to 3.503 & Aring;, the average grain size monotonically decreases, and the maximum texture strength monotonically weakens. Furthermore, during the in-situ alloying SLM process, chromium is dissolved into the FCC gamma-(Ni, Fe) of the NiFeMo alloy, forming dispersed, chromium-rich precipitates of larger sizes. This leads to a reduction in the intrinsic magnetic properties of the NiFeMo alloy, affecting the exchange coupling interaction between magnetic atoms and the motion of magnetic domains. Compared to the NiFeMo alloy, the saturation magnetization of the (NiFeMo)97.5Cr2.5 alloy is reduced to 0.4685 T, and the coercive force is increased to 37.7 A/m. However, when the chromium content is 1 wt%, the initial magnetic permeability of the (NiFeMo)99Cr1 alloy is 2.337 mH/m, which is an enhancement of 1.9422 mH/m compared to the NiFeMo alloy.
Keyword ：
NiFeMo alloy NiFeMo alloy Cr element Cr element Microstructure evolution Microstructure evolution In-situ alloying In-situ alloying Selective laser melting (SLM) Selective laser melting (SLM) Soft magnetic properties Soft magnetic properties
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| GB/T 7714 | Xiong, Falin , Yang, Jiaoxi , Guo, Donghai et al. Microstructural evolution and magnetic influence mechanism of Cr in-situ alloying SLM-formed NiFeMo alloys [J]. | MATERIALS TODAY COMMUNICATIONS , 2024 , 41 . |
| MLA | Xiong, Falin et al. "Microstructural evolution and magnetic influence mechanism of Cr in-situ alloying SLM-formed NiFeMo alloys" . | MATERIALS TODAY COMMUNICATIONS 41 (2024) . |
| APA | Xiong, Falin , Yang, Jiaoxi , Guo, Donghai , Liu, Wenfu , Fu, Zihan , Yang, Feng et al. Microstructural evolution and magnetic influence mechanism of Cr in-situ alloying SLM-formed NiFeMo alloys . | MATERIALS TODAY COMMUNICATIONS , 2024 , 41 . |
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Abstract ：
Metallurgical defects significantly affect the performance of materials fabricated by selective laser melting (SLM), becoming a bottleneck problem in the application of laser 3D printing technology. To investigate the effect of metallurgical defects on the magnetic properties of SLM NiFeMo permalloy. An in-depth characterization of the microstructure and phase composition of SLM-fabricated NiFeMo permalloy samples were carried out. Soft magnetic DC B-H hysteresis loop tester was used to assess the magnetic properties. Defect voxel data of as-built samples were obtained using X-ray microcomputed tomography (XCT). The results show that the micro-defects of SLM NiFeMo alloy are mainly composed of lack of fusion, pores, etc., and the phase composition of NiFeMo is mainly gamma- (Ni, Fe) solid solution. With the increase of laser volume energy density, the Bs and mu m of the material increase, while the Hc and Pu decreases. The equivalent diameter of the defects shows a positive correlation with the coercivity (Hc) and a negative correlation with the saturation magnetic induction (Bs) of NiFeMo permalloy.
Keyword ：
Magnetic properties Magnetic properties Selective laser melting Selective laser melting Permalloy Permalloy Metallurgical defects Metallurgical defects Defect quantitative characterization Defect quantitative characterization
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| GB/T 7714 | Yang, Jiaoxi , Zhu, Qing , Wang, Zekang et al. Effects of metallurgical defects on magnetic properties of SLM NiFeMo permalloy [J]. | MATERIALS CHARACTERIZATION , 2023 , 197 . |
| MLA | Yang, Jiaoxi et al. "Effects of metallurgical defects on magnetic properties of SLM NiFeMo permalloy" . | MATERIALS CHARACTERIZATION 197 (2023) . |
| APA | Yang, Jiaoxi , Zhu, Qing , Wang, Zekang , Xiong, Falin , Li, Qiang , Yang, Feng et al. Effects of metallurgical defects on magnetic properties of SLM NiFeMo permalloy . | MATERIALS CHARACTERIZATION , 2023 , 197 . |
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Abstract ：
In this research, FeCrMoMn coatings with excellent corrosion resistance and metallurgical quality were deposited on the 45# steel substrate by conventional and high-speed laser cladding at the scanning speed of 0.4 m/min, 40 m/min and 70 m/min, respectively. Their microstructure, phase composition, hardness and corrosion resistance were characterized and compared. The results show that compared with the conventional cladding, high-speed laser cladding leads to a decrease in grain size, heat affected zone, and the dilution rate of the coatings due to solute trapping of coatings. Metallurgical bonding is formed between the substrate and the coatings, and the hardness and electrochemical corrosion resistance of the coatings are also significantly improved.
Keyword ：
Corrosion resistance Corrosion resistance Solute trapping Solute trapping FeCrMoMn coatings FeCrMoMn coatings Microstructure Microstructure High-speed laser cladding High-speed laser cladding
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| GB/T 7714 | Yang, Jiaoxi , Bai, Bing , Ke, Hua et al. Effect of metallurgical behavior on microstructure and properties of FeCrMoMn coatings prepared by high-speed laser cladding [J]. | OPTICS AND LASER TECHNOLOGY , 2021 , 144 . |
| MLA | Yang, Jiaoxi et al. "Effect of metallurgical behavior on microstructure and properties of FeCrMoMn coatings prepared by high-speed laser cladding" . | OPTICS AND LASER TECHNOLOGY 144 (2021) . |
| APA | Yang, Jiaoxi , Bai, Bing , Ke, Hua , Cui, Zhe , Liu, Zhe , Zhou, Zheng et al. Effect of metallurgical behavior on microstructure and properties of FeCrMoMn coatings prepared by high-speed laser cladding . | OPTICS AND LASER TECHNOLOGY , 2021 , 144 . |
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Abstract ：
The effect of Cr additions on the microstructure and corrosion resistance of CuAl10 coating deposited by laser cladding was investigated. Laser cladding was performed using a 4000 W Diode laser under the same conditions, and the premixed powders with different weight ratios of CuAl10 to Cr were fed synchronously by TWIN10C powder feeder and D70 coaxial nozzle. The microstructures were observed under a scanning electron microscope equipped with an energy dispersive X-ray spectrometer (EDS) for chemical analysis, and phase analysis was performed with an X-ray diffractometer (XRD). The electrochemical corrosion behaviors of cladding layers were evaluated. The results showed that the CuAl10 coating has a good metallurgical bonding with the 17-4PH substrate. The addition of Cr can improve the corrosion resistance of CuAl10 coatings, and the passivation ability of the coatings increases with increasing Cr contents. The CuAl10 coating without Cr addition include alpha, gamma(2), and K phase; however, the addition of Cr leads to an increase of beta' phase and Cr and a decrease of gamma(2) and K phase in the CuAl10 coating.
Keyword ：
Aluminum bronze Aluminum bronze Corrosion resistance Corrosion resistance Laser cladding Laser cladding Cr additions Cr additions
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| GB/T 7714 | Yang, Jiaoxi , Wu, Feiyu , Bai, Bing et al. Effect of Cr additions on the microstructure and corrosion resistance of Diode laser clad CuAl10 coating [J]. | SURFACE & COATINGS TECHNOLOGY , 2020 , 381 . |
| MLA | Yang, Jiaoxi et al. "Effect of Cr additions on the microstructure and corrosion resistance of Diode laser clad CuAl10 coating" . | SURFACE & COATINGS TECHNOLOGY 381 (2020) . |
| APA | Yang, Jiaoxi , Wu, Feiyu , Bai, Bing , Wang, Gaosheng , Yang, Lei , Zhou, Shengfeng et al. Effect of Cr additions on the microstructure and corrosion resistance of Diode laser clad CuAl10 coating . | SURFACE & COATINGS TECHNOLOGY , 2020 , 381 . |
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Abstract ：
The NiCrMoAl/WC composite coatings with different contents of WC particles were deposited on P550 steel by laser cladding. The microstructure and magnetic properties of the coatings were characterized by SEM, EDS, XRD and VSM. The magnetism of phases was calculated by the first-principles based on the density functional theory. The results show that the coatings are mainly composed of gamma-Ni, WC, W2C, Ni2W4C, Ni3Mo3C, Mo2C and AI(4)C(3). The relative permeability of the coatings increases from 1.002 to 1.080 with the increase of WC percentage from 24 wt% to 60 wt%. The phases of WC, W2C, Ni2W4C and Al2C3 are non-magnetic, Ni3Mo3C and Mo2C are weakly magnetic according to the calculations. The weak magnetism of Ni3Mo3C originates mainly from the strongly correlated interaction of 3d electrons in Ni atoms, whereas that of Mo2C originates mainly from the d-state electrons of Mo atoms. The weak magnetism of the coatings (WC >= 48 wt%)is related to the metallurgy behaviors of WC particles. The C elements resulting from the decomposition of WC particles can be diffused into the Ni-based alloy, thus resulting in the formation of weakly magnetic phases in the cladding layer, such as Ni3Mo3C and Mo2C.
Keyword ：
Non-magnetic composite coatings Non-magnetic composite coatings Metallurgy behaviors Metallurgy behaviors Carbon diffusion Carbon diffusion First-principles First-principles Laser cladding Laser cladding
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| GB/T 7714 | Yang, Jiaoxi , Xiao, Zhiyong , Yang, Feng et al. Microstructure and magnetic properties of NiCrMoAl/WC coatings by laser cladding: Effect of WC metallurgical behaviors [J]. | SURFACE & COATINGS TECHNOLOGY , 2018 , 350 : 110-118 . |
| MLA | Yang, Jiaoxi et al. "Microstructure and magnetic properties of NiCrMoAl/WC coatings by laser cladding: Effect of WC metallurgical behaviors" . | SURFACE & COATINGS TECHNOLOGY 350 (2018) : 110-118 . |
| APA | Yang, Jiaoxi , Xiao, Zhiyong , Yang, Feng , Chen, Hong , Wang, Xibing , Zhou, Shengfeng . Microstructure and magnetic properties of NiCrMoAl/WC coatings by laser cladding: Effect of WC metallurgical behaviors . | SURFACE & COATINGS TECHNOLOGY , 2018 , 350 , 110-118 . |
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Abstract ：
A self-assembled Cu-Fe-Ni-Cr-Si immiscible composite with a bilayer structure was produced by laser induction hybrid cladding (LIHC) as a result of liquid phase separation (LPS). The microstructure exhibited by large amounts of ferromagnetic (FM) Fe3Si particles dispersed within the epsilon-Cu matrix in the upper layer, and many epsilon-Cu particles embedded within the FM Fe3Si matrix in the lower layer. The microhardness values of the Fe3Si matrix lower layer (758HV(0.2)) and epsilon-Cu matrix upper layer (248HV(0.2)) were similar to 7.3 and similar to 2.4 times higher than that of pure copper by LIHC, respectively, indicating that the immiscible composite exhibited strongly inhomogeneous characteristics consistent with a "bilayer structure". Moreover, the immiscible composite showed a high saturation magnetization of 96.2 emu/g and a low coercivity of 7.24 Oe due to the formation of FM Fe3Si with micro-and nanoscaled structures. (c) 2018 Elsevier B.V. All rights reserved.
Keyword ：
Microstructure Microstructure Bilayer Bilayer Immiscible composite Immiscible composite Liquid phase separation (LPS) Liquid phase separation (LPS) Magnetization Magnetization
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| GB/T 7714 | Dai, Xiaoqin , Xie, Min , Zhou, Shengfeng et al. Formation and properties of a self-assembled Cu-Fe-Ni-Cr-Si immiscible composite by laser induction hybrid cladding [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2018 , 742 : 910-917 . |
| MLA | Dai, Xiaoqin et al. "Formation and properties of a self-assembled Cu-Fe-Ni-Cr-Si immiscible composite by laser induction hybrid cladding" . | JOURNAL OF ALLOYS AND COMPOUNDS 742 (2018) : 910-917 . |
| APA | Dai, Xiaoqin , Xie, Min , Zhou, Shengfeng , Wang, Chunxia , Yang, Jiaoxi , Li, Zhengyang . Formation and properties of a self-assembled Cu-Fe-Ni-Cr-Si immiscible composite by laser induction hybrid cladding . | JOURNAL OF ALLOYS AND COMPOUNDS , 2018 , 742 , 910-917 . |
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Abstract ：
The WC reinforced Fe-based amorphous composite coatings were prepared by laser cladding with rectangular spot. The effect of laser remelting on the microstructure and properties of composite coatings was investigated. The results showed that laser remelting can reduce the cracks and porosities of the cladding coating and improve its surface quality. Large amounts of crystalline phases were precipitated at the top of the cladding and remelting coatings. However, the microstructure at the top of the remelting coating was finer compared to that at the top of the cladding coating. With increasing distance from the surface of substrate, the amorphous phase appeared within the remelting coating and large amounts of carbides rich in Fe and Mo, Fe23B6, gamma-Fe and Cr-9.1.Si-0.9 Slag phases were also precipitated in the remelting coating. As a result, the corrosion resistance of the remelting coating was higher than that of the cladding coating. The microhardness of the remelting coating was approximately 1.13 times higher than that of the cladding coating. (C) 2018 Elsevier Ltd. All rights reserved.
Keyword ：
Amorphous composite Amorphous composite Corrosion Corrosion Microstructure Microstructure Laser remelting Laser remelting Laser cladding Laser cladding
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| GB/T 7714 | Zhou, Shengfeng , Xu, Yongbo , Liao, Bangquan et al. Effect of laser remelting on microstructure and properties of WC reinforced Fe-based amorphous composite coatings by laser cladding [J]. | OPTICS AND LASER TECHNOLOGY , 2018 , 103 : 8-16 . |
| MLA | Zhou, Shengfeng et al. "Effect of laser remelting on microstructure and properties of WC reinforced Fe-based amorphous composite coatings by laser cladding" . | OPTICS AND LASER TECHNOLOGY 103 (2018) : 8-16 . |
| APA | Zhou, Shengfeng , Xu, Yongbo , Liao, Bangquan , Sun, Yajuan , Dai, Xiaoqin , Yang, Jiaoxi et al. Effect of laser remelting on microstructure and properties of WC reinforced Fe-based amorphous composite coatings by laser cladding . | OPTICS AND LASER TECHNOLOGY , 2018 , 103 , 8-16 . |
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Abstract ：
The Zr-1Nb alloy was treated by laser melting and vacuum annealing in order to improve the high temperature corrosion resistance. The morphology of the melting layer was observed by scanning electron microscopy, phase compositions and quantities were determined by X-ray diffraction and Raman; surface roughness was determined by profile meter; and hardness was measured by the micro-hardness tester. In order to characterize the corrosion resistance, autoclave experiments were conducted for 70 days in an aqueous steam condition of 360 under 18.6MPa in 0.01mol/L LiOH solutions. The results show that the surface roughness of Zr-1Nb cladding tubes is improved by laser melting; the laser melted layer is mainly composed of α-Zr phase and a small amount of m-ZrO2, and the phase composition of laser melted layer does not change after heat-treatment; under high power condition, laser melting can reduce the high temperature corrosion resistance of Zr-1Nb alloy. However, the high temperature corrosion resistance of Zr-1Nb alloy can be improved significantly under the condition of low power laser melting and auxiliary heat treatment process. By laser melting treatment, microhardness of zirconium alloy can be increased by 50-80HV0.1. And after heat treatment, microhardness of zirconium alloy is decreased compared with the laser melted sample, but it is still higher than the origin sample. © 2018, Journal of Materials Engineering. All right reserved.
Keyword ：
Corrosion resistance Corrosion resistance Nuclear fuel cladding Nuclear fuel cladding Lithium compounds Lithium compounds Binary alloys Binary alloys After-heat treatment After-heat treatment Microhardness Microhardness High temperature corrosion High temperature corrosion Zirconia Zirconia Corrosion resistant alloys Corrosion resistant alloys Niobium alloys Niobium alloys Zircaloy Zircaloy Morphology Morphology Surface roughness Surface roughness Zirconium metallography Zirconium metallography Heat resistance Heat resistance Melting Melting Scanning electron microscopy Scanning electron microscopy Phase composition Phase composition Niobium metallography Niobium metallography
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| GB/T 7714 | Yang, Jiao-Xi , Jia, Wu-Ming , Wang, Xin et al. Effect of Laser Melting Treatment on Microstructure and Properties of Zr-1Nb Nuclear Fuel Cladding [J]. | Journal of Materials Engineering , 2018 , 46 (8) : 120-126 . |
| MLA | Yang, Jiao-Xi et al. "Effect of Laser Melting Treatment on Microstructure and Properties of Zr-1Nb Nuclear Fuel Cladding" . | Journal of Materials Engineering 46 . 8 (2018) : 120-126 . |
| APA | Yang, Jiao-Xi , Jia, Wu-Ming , Wang, Xin , Wen, Qiang , Zhang, Yan-Wei , Bai, Guang-Hai et al. Effect of Laser Melting Treatment on Microstructure and Properties of Zr-1Nb Nuclear Fuel Cladding . | Journal of Materials Engineering , 2018 , 46 (8) , 120-126 . |
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Abstract ：
In order to improve the homogeneity of spherical Fe-rich particles within the Cu-rich matrix, the Cu95Fe5 (wt%) immiscible composite coating has been produced by the combination of mechanical alloying and laser cladding. The results show that the milled composite powder presents a polygonal morphology and is mainly composed of face-centered-cubic (fcc)-Cu solid solution. The demixing or delimitation is eliminated in the immiscible composite coating produced by laser cladding and large amounts of spherical alpha-Fe particles are dispersed within the epsilon-Cu matrix as a result of liquid phase separation (LPS). The size of the Fe-rich particles measured is in radius of similar to 1.5 mu m, which is much smaller than the calculated critical radius (similar to 2.3 mu m), confirming that the alpha-Fe particles containing a supersaturated Cu are driven by the dominant mechanism of Marangoni motion. Compared to Brass, the immiscible composite coating exhibits the improved homogeneous microhardness (153HV(0.2)) and higher corrosion resistance, as well as a saturated magnetization of similar to 9.19 emu/g and low coercivity of similar to 9.25 Oe. (C) 2018 Elsevier B.V. All rights reserved.
Keyword ：
Microstructure Microstructure Liquid phase separation Liquid phase separation Cu-Fe Cu-Fe Magnetic properties Magnetic properties Immiscible alloy Immiscible alloy
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| GB/T 7714 | Dai, Xiaoqin , Xie, Min , Zhou, Shengfeng et al. Formation mechanism and improved properties of Cu95Fe5 homogeneous immiscible composite coating by the combination of mechanical alloying and laser cladding [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2018 , 740 : 194-202 . |
| MLA | Dai, Xiaoqin et al. "Formation mechanism and improved properties of Cu95Fe5 homogeneous immiscible composite coating by the combination of mechanical alloying and laser cladding" . | JOURNAL OF ALLOYS AND COMPOUNDS 740 (2018) : 194-202 . |
| APA | Dai, Xiaoqin , Xie, Min , Zhou, Shengfeng , Wang, Chunxia , Gu, Menghao , Yang, Jiaoxi et al. Formation mechanism and improved properties of Cu95Fe5 homogeneous immiscible composite coating by the combination of mechanical alloying and laser cladding . | JOURNAL OF ALLOYS AND COMPOUNDS , 2018 , 740 , 194-202 . |
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Abstract ：
The effect of Si addition on phase separation and soft magnetic properties of [Cu-0.6(FeCrC)(0.4)]100-Si-x(x) (x = 3 and 8) immiscible composites produced by laser induction hybrid cladding (LIHC) has been investigated. The duplex structure of immiscible composites was composed of many Fe-rich particles dispersed within Cu-rich upper layer and large amounts of Cu-rich particles embedded within Fe-rich lower layer. However, the increasing Si addition not only induced the precipitation of intermetallic compound Cu6.69Si within Cu-rich upper layer, but also increased the area of Fe-rich layer, the size of Fe-and Cu-rich particles, as well as the solubility of Si in Fe-and Cu-rich phases. Moreover, the microhardness of Fe-and Cu-rich layers was increased to 747.3HV(0.2) and 302.6HV(0.2) in the Cu-55.2(FeCrC)(36.8)Si-8 immiscible composite, respectively, which was similar to 1.6 and similar to 1.8 times higher than that in the Cu-58.2(FeCrC)(38.8)Si-3 immiscible composite, due to solid-solution strengthening and dispersion strengthening. Compared to the Cu-58.2(FeCrC)(38.8)Si-3 immiscible composite, the Cu-55.2(FeCrC)(36.8)Si-8 immiscible composite presented a saturated magnetization of 13.7 emu/g, relatively lower coercivity of 24.9 Oe and higher Curie temperature of larger than 400 K due to appearance of ferromagnetic alpha-Fe(Si) phase. (C) 2017 Elsevier B.V. All rights reserved.
Keyword ：
Liquid phase separation Liquid phase separation Intermetallic compound Intermetallic compound Magnetic properties Magnetic properties Microstructure Microstructure Immiscible alloys Immiscible alloys
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| GB/T 7714 | Zhou, Shengfeng , Dai, Xiaoqin , Wang, Chunxia et al. Phase separated characteristics and soft magnetic properties of [Cu-0.6(FeCrC)(0.4)](100-x)Si-x immiscible composites by laser induction hybrid cladding [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2018 , 732 : 740-747 . |
| MLA | Zhou, Shengfeng et al. "Phase separated characteristics and soft magnetic properties of [Cu-0.6(FeCrC)(0.4)](100-x)Si-x immiscible composites by laser induction hybrid cladding" . | JOURNAL OF ALLOYS AND COMPOUNDS 732 (2018) : 740-747 . |
| APA | Zhou, Shengfeng , Dai, Xiaoqin , Wang, Chunxia , Xie, Min , Yang, Jiaoxi , Li, Zhengyang . Phase separated characteristics and soft magnetic properties of [Cu-0.6(FeCrC)(0.4)](100-x)Si-x immiscible composites by laser induction hybrid cladding . | JOURNAL OF ALLOYS AND COMPOUNDS , 2018 , 732 , 740-747 . |
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