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学者姓名：符寒光
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Abstract ：
TA15 alloy, widely utilized in the aerospace industry for its exceptional mechanical properties, was examined in this study for its anisotropic microstructure evolution and deformation behavior in laser melting deposition (LMD)-fabricated samples at room temperature. Specimens were extracted from build (Z-) and scanning (X-) directions and their microstructures and mechanical properties were compared. A method based on in-situ electron back scattered diffraction (EBSD) tensile testing, was used by inserting a tensile stage into scanning electron microscopy (SEM) to observe the real-time microstructure evolution with the change of dynamic tensile force. The evolution of slip bands, grain rotation, grain-to-grain misorientation, and the dynamic change of mechanical properties were also systematically investigated. The results demonstrated that the anisotropic mechanical properties along the Z-and X-directions in LMD-fabricated TA15 alloy stemmed from variations in microstructural anisotropy. Z-direction specimen exhibits high elongation and reduction of cross section, whereas, high tensile strength and yield strength were identified in X-direction. Furthermore, the texture behavior, crack propagation and fracture mechanism are discussed for each specimen orientation.
Keyword ：
TA15 alloy TA15 alloy In-situ tensile In-situ tensile Laser melting deposition Laser melting deposition Anisotropic mechanical behavior Anisotropic mechanical behavior Texture evolution Texture evolution
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| GB/T 7714 | Lv, Xiaolong , Lu, Junxia , Chai, Ruxia et al. In-situ SEM-EBSD tensile study at room temperature of additive manufactured TA15 alloy: Microstructure, texture and mechanical behavior [J]. | MATERIALS TODAY COMMUNICATIONS , 2025 , 45 . |
| MLA | Lv, Xiaolong et al. "In-situ SEM-EBSD tensile study at room temperature of additive manufactured TA15 alloy: Microstructure, texture and mechanical behavior" . | MATERIALS TODAY COMMUNICATIONS 45 (2025) . |
| APA | Lv, Xiaolong , Lu, Junxia , Chai, Ruxia , Fu, Hanguang . In-situ SEM-EBSD tensile study at room temperature of additive manufactured TA15 alloy: Microstructure, texture and mechanical behavior . | MATERIALS TODAY COMMUNICATIONS , 2025 , 45 . |
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Abstract ：
High-carbon wear-resistant steels with varying Ti contents were produced using a vacuum melting and casting method. The effect of Ti content on TiC precipitation and wear resistance of high-carbon steel were investigated in this study. The results show that the size, morphology, and distribution of TiC is influenced by solidification rate and chemical composition. As Ti content increases, the precipitation temperature and average size of TiC rise, leading to a more uniform size and distribution. Higher Ti content also reduces the as-cast grain size, refining the microstructure after heat treatment. The in-situ TiC has little effect on hardness, indicating that effective carbon content is the key factor in enhancing hardness and wear resistance. The wear resistance of high-carbon steel improves with higher Ti content, with micro-cutting and plowing as the dominant wear mechanism. The wear resistance of 1.0Ti steel is 2.5 times that of 0.2Ti steel, it can be attributed to the elevated effective carbon content, augmented TiC quantity, and the ensuing fine-grain strengthening effect.
Keyword ：
microstructure microstructure wear resistance wear resistance high-carbon steel high-carbon steel TiC precipitation TiC precipitation
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| GB/T 7714 | Huang, Longxiao , Yang, Penghui , Zheng, Yulong et al. Effect of Ti Content on TiC Precipitation and Wear Resistance of High-Carbon Steel [J]. | INTERNATIONAL JOURNAL OF METALCASTING , 2025 . |
| MLA | Huang, Longxiao et al. "Effect of Ti Content on TiC Precipitation and Wear Resistance of High-Carbon Steel" . | INTERNATIONAL JOURNAL OF METALCASTING (2025) . |
| APA | Huang, Longxiao , Yang, Penghui , Zheng, Yulong , Lu, Renzhong , Wang, Kaiming , Fu, Hanguang . Effect of Ti Content on TiC Precipitation and Wear Resistance of High-Carbon Steel . | INTERNATIONAL JOURNAL OF METALCASTING , 2025 . |
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Abstract ：
A systematic study using the first-principles method was conducted to investigate the interface relationship between TiC and TiN in high-titanium steel, where TiC nucleates and grows with TiN as the core. The results showed that the energy of the (111) surface depends on the type of terminal atoms, with the Ti-terminated surface exhibiting lower surface energy than the C(N)-terminated surface. In contrast, the energy of (100) and (110) surfaces was independent of the terminal atom type. The order of surface energy determined to be (111)Ti<(100)<(110)<(111)-C(N), the work function exhibits the same trend, while the stability is exactly the opposite. Among all interface structures, the interface structure with Ti-C terminal atomic combination was identified as the most stable, which can be attributed to the formation of covalent, ionic, and metallic bonds at the interface. The bonding strength primarily arises from the hybridization between Ti-d orbitals and C(N)-p orbitals. Within the (111) interface structures, metallic bonds were formed in the interface structure with the Ti-Ti terminal atomic combination, leading to the lowest interface energy and making it thermodynamically the most stable. Consequently, TiC is capable of heterogeneously nucleating on TiN, with the preferred nucleation surface of TiN following the order of (111)>(100)>(110).
Keyword ：
Heterogeneous nucleation Heterogeneous nucleation First-principles First-principles TiN/TiC interface TiN/TiC interface High-titanium steel High-titanium steel
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| GB/T 7714 | Huang, Longxiao , Wang, Kaiming , Fu, Hanguang . First-principles study on TiC/TiN heterogeneous nucleation interface in high-titanium steel [J]. | COMPUTATIONAL MATERIALS SCIENCE , 2025 , 247 . |
| MLA | Huang, Longxiao et al. "First-principles study on TiC/TiN heterogeneous nucleation interface in high-titanium steel" . | COMPUTATIONAL MATERIALS SCIENCE 247 (2025) . |
| APA | Huang, Longxiao , Wang, Kaiming , Fu, Hanguang . First-principles study on TiC/TiN heterogeneous nucleation interface in high-titanium steel . | COMPUTATIONAL MATERIALS SCIENCE , 2025 , 247 . |
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Abstract ：
This article investigates the effect of N content on the microstructure, mechanical properties and wear resistance of hypereutectic high chromium cast iron (HHCCI). With the increase of N content, the primary carbides are obviously refined, the austenite content increases, and the dispersed granular Cr2N precipitates. After quenching at 1000 degrees C, secondary carbides are precipitated from the matrix, the matrix transforms into martensite + retained austenite. With the increase of N content, the corrosion resistance of HHCCI increases, and 0.3 wt.% N HHCCI shows the best corrosion resistance. With the increase of N content, the wear resistance of HHCCI increases. The wear resistance of HHCCI with 0.15 wt.% N is the best, which is 1.57 times that of HHCCI without N.
Keyword ：
microstructure microstructure mechanical properties mechanical properties wear resistance wear resistance Hypereutectic high chromium cast iron Hypereutectic high chromium cast iron N content N content
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| GB/T 7714 | Liu, Yawei , Gong, Liqiang , Dong, Minqi et al. Microstructure and properties of hypereutectic high chromium cast iron containing nitrogen [J]. | MATERIALS SCIENCE AND TECHNOLOGY , 2024 , 40 (1) : 26-41 . |
| MLA | Liu, Yawei et al. "Microstructure and properties of hypereutectic high chromium cast iron containing nitrogen" . | MATERIALS SCIENCE AND TECHNOLOGY 40 . 1 (2024) : 26-41 . |
| APA | Liu, Yawei , Gong, Liqiang , Dong, Minqi , Chen, Zhengyang , Jin, Tounan , Yin, Wenhang et al. Microstructure and properties of hypereutectic high chromium cast iron containing nitrogen . | MATERIALS SCIENCE AND TECHNOLOGY , 2024 , 40 (1) , 26-41 . |
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Abstract ：
In this study, Ni-based composite coatings with (Cr, V) B-2 ceramic particles were reinforced using varying Y2O3 concentrations for crack-free layers on 40CrNiMo steel surfaces. We investigated the phase composition, microstructure, microhardness, wear resistance, fracture toughness, and the reinforcement mechanism of Y2O3 within the composite cladding. Using SEM and TEM, we revealed the pivotal role of rare earth oxide Y2O3 in refining grains and forming uniform, densely-packed microstructures in the coatings. The resulting cladding layer mainly consisted of fine, strip-like precipitates of the gamma-Ni phase, along with ceramic reinforcement particles like CrB2, VC, and VB2. Unmelted Y2O3 and preferentially nucleated VC served as nucleation sites for (Cr, V) B-2 particles, contributing to the overall structural integrity. Our findings showed that an optimal quantity of Y2O3 moderately increased the hardness to a maximum of 1049.4 HV0.2. Additionally, with increased Y2O3 content, the cladding layer exhibited enhanced wear resistance, improved fracture toughness, and reduced susceptibility to cracking due to complete plastic deformation. However, excessive Y2O3 addition led to a decline in wear resistance, emphasizing the importance of carefully controlling Y2O3 content for optimal coating performance. These results highlight the potential for Y2O3 to enhance Ni-based (Cr, V) B-2 ceramic particle composite coatings, positioning them as promising candidates for advanced surface enhancement applications in materials science and engineering.
Keyword ：
ceramic hard phase ceramic hard phase laser cladding laser cladding nickel-based composite coating nickel-based composite coating wear resistance wear resistance Y2O3 addition Y2O3 addition in-situ synthesized in-situ synthesized
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| GB/T 7714 | Sun, Ze , Liu, Guixin , Fu, Hanguang . Effect of Y2O3 Addition on Microstructure and Properties of In Situ Ceramic Particle-Reinforced Nickel Matrix Composite Coatings [J]. | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2024 . |
| MLA | Sun, Ze et al. "Effect of Y2O3 Addition on Microstructure and Properties of In Situ Ceramic Particle-Reinforced Nickel Matrix Composite Coatings" . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE (2024) . |
| APA | Sun, Ze , Liu, Guixin , Fu, Hanguang . Effect of Y2O3 Addition on Microstructure and Properties of In Situ Ceramic Particle-Reinforced Nickel Matrix Composite Coatings . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2024 . |
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Abstract ：
Laser cladding, as an advanced surface modification technology, has the advantages of a high energy density, controlled dilution rate and good metallurgical bonding between the coating and the substrate. Its rapid heating and cooling properties help to form a dense and fine coating structure on the surface of the substrate, thus enhancing wear and corrosion resistance. In recent years, the in situ generation of carbide-reinforced iron-based composite coatings has gradually become a research hotspot because it combines the high hardness values of carbide with the high toughness values of iron-based alloys, which significantly improves the comprehensive performance of the coatings. This paper reviews the research progress of laser cladding in situ carbide-reinforced iron-based alloy coatings and explores the role of different types of in situ synthesized carbides (TiC, NbC, WC, etc.) in the coatings and their effects on their wear resistance and mechanical properties. The distribution of carbides in the coatings and their morphological characteristics are also discussed, and the effects of laser power, scanning speed and auxiliary treatments (ultrasonic vibration, induction heating, etc.) on the microstructure and properties of the coatings are analyzed. Finally, the problems and future directions of development in this field are envisioned.
Keyword ：
laser cladding laser cladding in situ carbides in situ carbides wear resistance wear resistance microstructure microstructure iron-based composite coatings iron-based composite coatings
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| GB/T 7714 | Tang, Junli , Wang, Kaiming , Fu, Hanguang . Laser Cladding In Situ Carbide-Reinforced Iron-Based Alloy Coating: A Review [J]. | METALS , 2024 , 14 (12) . |
| MLA | Tang, Junli et al. "Laser Cladding In Situ Carbide-Reinforced Iron-Based Alloy Coating: A Review" . | METALS 14 . 12 (2024) . |
| APA | Tang, Junli , Wang, Kaiming , Fu, Hanguang . Laser Cladding In Situ Carbide-Reinforced Iron-Based Alloy Coating: A Review . | METALS , 2024 , 14 (12) . |
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Abstract ：
This article investigates the change rule of the microstructure, hardness and wear resistance of high boron steel containing 0.1 wt.% to 0.5 wt.% boron in the cast state and after quenching at different temperatures. The results show that the microstructure of cast high boron steel with different contents of boron is composed of pearlite, ferrite and eutectic boride, which has lower hardness and wear resistance, and the higher the content of boron, the higher the hardness and the better the wear resistance. After quenching at 900-1,000 degrees C, pearlite and ferrite change into a large number of lamellar martensite and a small amount of lath martensite. After high-temperature quenching at 1,050 degrees C, retained austenite appears in the microstructure in addition to martensite, and borides are partially dissolved. The hardness and wear resistance are significantly improved compared to the as-cast high boron steel. As the quenching temperature increases, the dissolution of boride is obvious, the hardness and wear resistance are firstly increased and then decreased. When the content of boron is 0.5 wt.% and the quenching temperature is 1,000 degrees C, the hardness reaches a maximum value of 59.0 HRC, and the abrasion resistance is the best.
Keyword ：
microstructure microstructure wear resistance wear resistance quenching temperature quenching temperature high boron steel high boron steel hardness hardness
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| GB/T 7714 | Wang, Han , Fu, Hanguang . Effect of boron content and quenching temperature on the microstructure and wear resistance of high boron steel [J]. | MATERIALS TESTING , 2024 , 66 (12) : 2018-2029 . |
| MLA | Wang, Han et al. "Effect of boron content and quenching temperature on the microstructure and wear resistance of high boron steel" . | MATERIALS TESTING 66 . 12 (2024) : 2018-2029 . |
| APA | Wang, Han , Fu, Hanguang . Effect of boron content and quenching temperature on the microstructure and wear resistance of high boron steel . | MATERIALS TESTING , 2024 , 66 (12) , 2018-2029 . |
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Abstract ：
By employing the first-principles calculations along with SEM, XRD, 3D laser confocal microscopy, and nanoindentation techniques, the structure and properties of additively manufactured NiTi coatings under different atmospheres were investigated. Using an inert atmosphere spraying system, NiTi alloy wires were used instead of NiTi powder to prepare the coatings, reducing the oxygen content from 6.8 wt% in atmospheric NiTi coatings to 2.3 wt% in inert atmosphere NiTi coatings. The NiTi coatings prepared under an inert atmosphere exhibited significantly fewer cracks, defects, and precipitates, with porosity reduced to 0.85+0.11vol%, resulting in a denser coating structure. Cavitation tests revealed that after 120 minutes of cavitation, the cavitation resistance of NiTi coatings prepared in an inert atmosphere (weight loss: 41.2+4.1 mg) was significantly superior to that of coatings prepared in an atmospheric environment (weight loss: 63.7+4.2 mg). The first-principles calculations indicated that the NiTi3 and Ni3Ti phases formed during the spraying process are more stable than other precipitated phases. The NiTi and Ni3Ti phases exhibit lower anisotropy, while the NiTi3 phase shows significant anisotropy. The minor precipitation of NiTi3 and Ni3Ti phases contributes to enhancing the toughness and hardness of the coatings, thereby improving their cavitation resistance potential. The NiTi and NiTi3 phases exhibit certain metallic properties, which can improve electrical conductivity. The Ni3Ti has weaker metallic properties and electrical conductivity, demonstrating superior corrosion resistance.
Keyword ：
First-principles calculations First-principles calculations Additive manufacturing Additive manufacturing Superelasticity Superelasticity Cavitation resistance Cavitation resistance NiTi coatings NiTi coatings
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| GB/T 7714 | Gong, Liqiang , Du, Hejun , Absi, Rafik et al. Study on the microstructure and properties of additively manufactured NiTi coating [J]. | MATERIALS TODAY COMMUNICATIONS , 2024 , 40 . |
| MLA | Gong, Liqiang et al. "Study on the microstructure and properties of additively manufactured NiTi coating" . | MATERIALS TODAY COMMUNICATIONS 40 (2024) . |
| APA | Gong, Liqiang , Du, Hejun , Absi, Rafik , Fu, Hanguang . Study on the microstructure and properties of additively manufactured NiTi coating . | MATERIALS TODAY COMMUNICATIONS , 2024 , 40 . |
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Abstract ：
The effects of different quenching temperatures on the microstructure and properties of 3.3C-20.0Cr-1.0W-0.5B-2.0V-1.8Mo (wt.%) high-chromium cast iron were investigated using an optical microscope, scanning electron microscope, X-ray diffractometer, Rockwell hardness tester, microhardness tester, and wear testing machine. The results show that the microstructure of as-cast multivariate high chromium cast iron mainly consists of eutectic carbides (M7C3), austenite and martensite matrix. In the process of quenching temperature increasing from 950 degrees C to 1150 degrees C, the morphology of massive eutectic carbide (M7C3) did not change. Acicular eutectic carbide (M7C3) appeared to aggregate and grow, and was distributed in the form of blocks or rods. Secondary carbides (M23C6) were precipitated in the matrix. The matrix is transformed from austenite to martensite, with a small amount of residual austenite. The hardness and wear resistance firstly increased and then decreased. The hardness of the 1100 degrees C x 1 h + fog-cooled high-chromium cast iron reaches a peak of 67.0 HRC, and the abrasion resistance increases by 37.0% compared with that of the 950 degrees C x 1 h + fog-cooled specimen.
Keyword ：
quenching heat treatment quenching heat treatment high chromium cast iron high chromium cast iron microstructure microstructure wear resistance wear resistance hardness hardness
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| GB/T 7714 | Li, Siyang , Cheng, Xiaole , Fu, Hanguang . Effect of quenching temperature on microstructure and properties of multivariate high chromium cast iron [J]. | METALLURGICAL RESEARCH & TECHNOLOGY , 2024 , 121 (6) . |
| MLA | Li, Siyang et al. "Effect of quenching temperature on microstructure and properties of multivariate high chromium cast iron" . | METALLURGICAL RESEARCH & TECHNOLOGY 121 . 6 (2024) . |
| APA | Li, Siyang , Cheng, Xiaole , Fu, Hanguang . Effect of quenching temperature on microstructure and properties of multivariate high chromium cast iron . | METALLURGICAL RESEARCH & TECHNOLOGY , 2024 , 121 (6) . |
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Abstract ：
Ni-based composite coatings containing transition metal carbides exhibit high hardness, and the rapid heating and cooling characteristics of laser cladding lead to the formation of cracks in these coatings, significantly limiting their practical industrial applications. In this study, (Ti, V)C/Ni composite coatings were prepared at different preheating temperatures to investigate the effect of preheating on crack formation. The microstructure of the coatings was investigated by XRD, OM, and SEM, and the differences in wear resistance were studied by block-on-ring wear tests. The results show that with increasing preheating temperature, the residual stress in the coatings decreases significantly, the secondary dendrite arm spacing increases, and the number of cracks decreases. No crack defects were observed in the coating preheated at 700 degrees C, indicating that substrate preheating can effectively suppress crack formation during the laser cladding process. Compared with the coating prepared without preheating, the hardness and wear resistance of the coating prepared by preheating at 700 degrees C were reduced, which was still 5.6% higher than that of the substrate after quenching, and the wear resistance was 1.76 times higher than that of the substrate.
Keyword ：
preheating temperature preheating temperature Laser cladding Laser cladding (Ti, V)C reinforced phase (Ti, V)C reinforced phase wear resistance wear resistance nickel-based composite coating nickel-based composite coating
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| GB/T 7714 | Sun, Ze , Fu, Hanguang , Zhang, Jingbing et al. THE INFLUENCE OF PREHEATING TEMPERATURE ON THE MICROSTRUCTURE AND PROPERTIES OF LASER-CLAD Ni-BASED COMPOSITE COATINGS CONTAINING (Ti, V)C [J]. | SURFACE REVIEW AND LETTERS , 2024 . |
| MLA | Sun, Ze et al. "THE INFLUENCE OF PREHEATING TEMPERATURE ON THE MICROSTRUCTURE AND PROPERTIES OF LASER-CLAD Ni-BASED COMPOSITE COATINGS CONTAINING (Ti, V)C" . | SURFACE REVIEW AND LETTERS (2024) . |
| APA | Sun, Ze , Fu, Hanguang , Zhang, Jingbing , Lin, Jian . THE INFLUENCE OF PREHEATING TEMPERATURE ON THE MICROSTRUCTURE AND PROPERTIES OF LASER-CLAD Ni-BASED COMPOSITE COATINGS CONTAINING (Ti, V)C . | SURFACE REVIEW AND LETTERS , 2024 . |
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