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学者姓名：牟刚
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Abstract ：
This study investigated the fabrication of a strengthened Ti-TiO2 material with adding 0.5 wt.% TiO2 nanoparticles via selective laser melting process in comparison with CP-Ti. Through the process parameters optimized by response surface methodology, the Ti-TiO2 material fabricated by SLM showed remarkable tensile strength of 800.6 MPa and elongation of 14%, as compared to the fabricated CP-Ti with tensile strength of 594.0 MPa and elongation of 21%. The x-ray diffraction patterns of fabricated specimens showed the expansion of the hcp-Ti lattice along the c-axis due to dissolved oxygen atoms from the decomposition of TiO2 nanoparticles. The microstructure analysis observed remains of incompletely decomposed TiO2 and TiO phases in SLMed Ti-TiO2 material, which was distinguished from former studies. Consequently, the decomposition behavior of added TiO2 nanoparticles associated with the dissolved oxygen in the Ti-matrix during the SLM process was discussed. Based on the evaluation of both the solution effect of oxygen atoms and the reinforcing effect of undecomposed nanoparticles, the dissolved oxygen from decomposed TiO2 was considered the primary factor in the intensified strength of SLMed Ti-TiO2 material. These results could offer novel insights into the additive manufacturing of high-strength and biocompatible titanium alloy via the SLM process.
Keyword ：
additive manufacturing additive manufacturing biomaterials biomaterials composites composites metallic matrix metallic matrix strengthening mechanism strengthening mechanism titanium titanium
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| GB/T 7714 | Xiang, Hongliang , Chen, Xiaoyu , Huang, Ye et al. Decomposition Behavior and Strengthening Mechanism of Ti-TiO2 Material in Selective Laser Melting Process [J]. | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2025 . |
| MLA | Xiang, Hongliang et al. "Decomposition Behavior and Strengthening Mechanism of Ti-TiO2 Material in Selective Laser Melting Process" . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE (2025) . |
| APA | Xiang, Hongliang , Chen, Xiaoyu , Huang, Ye , Wu, Chaochao , Mou, Gang , Zheng, Kaikui . Decomposition Behavior and Strengthening Mechanism of Ti-TiO2 Material in Selective Laser Melting Process . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2025 . |
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The demand for butt welding of stainless-steel thin plates has been increasing year by year in industries such as shipbuilding, pharmaceuticals, petrochemicals, and food processing. However, during the butt welding of thin plates, the low structural rigidity causes real-time change in the gap, which complicates the ability of automated welding to achieve uniform weld seam geometry. Therefore, this paper aims to overcome the challenges of cross coupling and the sensitivity of hyperparameter selection and realize the gap-adaptive welding during the high frequency pulse arc welding process by implementing to optimize the number of trees and the minimum number of leaf nodes in the random forest model. After the optimal welding parameters are then used to train the random forest model, a gap-adaptive control platform, which take gap, weld face width, weld root width, and face reinforcement as input features and peak current, wire feed speed, and welding speed as output features, is established to enable real-time measure the gap by using a laser track sensor. The results demonstrate that under fixed and gradient gap conditions, the weld seam geometry is uniformly formed and no significant defects can be found. Under step gap conditions, gap-adaptive welding effectively prevents burn-through defects and ensures stable weld seam geometry. Furthermore, microstructural and mechanical property characterization indicates that an increase in frequency during welding effectively refines the grain size in the seam. The tensile strength values of the samples are similar and all samples fracture at the base metal.
Keyword ：
Arc welding Arc welding Gap-adaptive Gap-adaptive Machine learning Machine learning Stainless-steel Stainless-steel Thin plate Thin plate
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| GB/T 7714 | Mou, Gang , Zhang, Teng , Li, Fang et al. Research on gap-adaptive high frequency pulse arc welding of stainless-steel thin plate based on machine learning [J]. | JOURNAL OF MANUFACTURING PROCESSES , 2025 , 141 : 1084-1097 . |
| MLA | Mou, Gang et al. "Research on gap-adaptive high frequency pulse arc welding of stainless-steel thin plate based on machine learning" . | JOURNAL OF MANUFACTURING PROCESSES 141 (2025) : 1084-1097 . |
| APA | Mou, Gang , Zhang, Teng , Li, Fang , Hua, Xueming , Xiang, Hongliang , Yang, Xu et al. Research on gap-adaptive high frequency pulse arc welding of stainless-steel thin plate based on machine learning . | JOURNAL OF MANUFACTURING PROCESSES , 2025 , 141 , 1084-1097 . |
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The dissimilar joints of TC4 and IN718 were successfully welded by using a fiber laser and Cu interlayer with varying thicknesses. This research focused on the interface on the TC4 side, where two transition layers were identified: a Ti-rich layer and a Ti-poor layer. The Ti-rich layer primarily consisted of Ti2Cu and Ti2Ni. Meanwhile, the Ti-poor layer contained a range of harder and more brittle intermetallic compounds (IMCs), such as TiNiCu, TiCr2 and TiFe2, with the thickness increasing as the interlayer thickness increased. The fracture of all the joints occurred at the interface on the TC4 side. Insufficient Cu introduction tended to cause the penetration of Ti into Layer B, reacting with elements such as Fe and Cr to form more brittle and hard IMCs. Conversely, excess Cu in the molten pool, resulting from the introduction of a 0.4 mm Cu interlayer could lead to the formation of much (Cu, Ni), which caused softening and a deterioration in the tensile strength of the joint. When a 0.3 mm Cu interlayer was employed, the diffusion of Ti and Cu reached equilibrium, resulting in an average tensile strength of 319 MPa for the obtained joint, which was 28 % higher than that of the joint with a 0.4 mm interlayer.
Keyword ：
Elemental diffusion Elemental diffusion Intermetallic compound Intermetallic compound Laser welding Laser welding Mechanical property Mechanical property Ti/Ni dissimilar joint Ti/Ni dissimilar joint
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| GB/T 7714 | Yin, Qi'an , Ren, Wenjie , Mou, Gang et al. Effect of Cu interlayers on element diffusion and properties of laser welded Ti6Al4V/Inconel 718 dissimilar joints [J]. | OPTICS AND LASER TECHNOLOGY , 2025 , 185 . |
| MLA | Yin, Qi'an et al. "Effect of Cu interlayers on element diffusion and properties of laser welded Ti6Al4V/Inconel 718 dissimilar joints" . | OPTICS AND LASER TECHNOLOGY 185 (2025) . |
| APA | Yin, Qi'an , Ren, Wenjie , Mou, Gang , Yang, Shanglu . Effect of Cu interlayers on element diffusion and properties of laser welded Ti6Al4V/Inconel 718 dissimilar joints . | OPTICS AND LASER TECHNOLOGY , 2025 , 185 . |
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The surface of the TC11 titanium alloy is significantly strengthened through the ultrasonic tumbling process. The effect of ultrasonic tumbling process parameters on the microstructure and surface roughness of a titanium alloy using multiple techniques are investigated, including OM, white light interferometry, SEM, EDS, and XRD. The hardness, friction, and wear properties of the rolling surface are analyzed using a microhardness tester and a multifunctional friction-wear tester. The results indicate that the surface roughness of the titanium alloy decreases initially and then increases with an increase in rolling power, rolling times, static pressure, reduction, spindle speed, and feed rate. The lowest value is achieved with the following parameters: 660 W rolling power, 5 rolling times, static pressure of 0.20 MPa, reduction of 0.15 mm, spindle speed of 200 r·min−1, and feed rate of 0.10 mm·r−1. With an increase in power, the surface hardness of titanium alloy increases, which leads to a reduction in friction coefficient and wear loss. As the rolling times, static pressure, reduction, spindle speed, and feed rate increase, the surface hardness initially increases and then decreases. Meanwhile, the friction coefficient and wear loss tend to decrease initially and then increase. When the rolling power is set to 990 W, the rolling frequency is 5 times, the static pressure is 0.20 MPa, the reduction is 0.15 mm, the spindle speed is 200 r·min−1, and the feed rate is 0.10 mm·r−1, the hardness reaches its maximum value, while the friction coefficient and wear loss reach their minimum values. Response surface optimization was conducted to obtain the optimal process parameters, including a rolling power of 990 W, rolling frequency of 5 times, static pressure strength of 0.20 MPa, reduction of 0.15 mm, spindle speed of 198 r·min−1, and feed rate of 0.10 mm·r−1. Compared to the surface of the titanium alloy before rolling, the hardness increased by 36.4% from 337 HV to 461 HV, the surface roughness decreased by 89.9% from 1.88 μm to 0.19 μm, and the wear loss decreased by 83.3% from 0.60 mg to 0.10 mg. © 2024 Chinese Mechanical Engineering Society. All rights reserved.
Keyword ：
Friction Friction Hardness Hardness Rolling Rolling Surface properties Surface properties Surface roughness Surface roughness Titanium alloys Titanium alloys Wear of materials Wear of materials
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| GB/T 7714 | Zheng, Kaikui , Zhao, Xinzhe , Mou, Gang et al. Surface Quality, Friction and Wear Properties of TC11 Titanium Alloy Strengthened Using Ultrasonic Rolling [J]. | Journal of Mechanical Engineering , 2024 , 60 (9) : 137-151 . |
| MLA | Zheng, Kaikui et al. "Surface Quality, Friction and Wear Properties of TC11 Titanium Alloy Strengthened Using Ultrasonic Rolling" . | Journal of Mechanical Engineering 60 . 9 (2024) : 137-151 . |
| APA | Zheng, Kaikui , Zhao, Xinzhe , Mou, Gang , Ren, Zhiying . Surface Quality, Friction and Wear Properties of TC11 Titanium Alloy Strengthened Using Ultrasonic Rolling . | Journal of Mechanical Engineering , 2024 , 60 (9) , 137-151 . |
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Insole blanking production technology plays a vital role in contemporary machining and manufacturing industries. Existing insole blanking production models have limitations because most robots are required to accurately position the workpiece to a predetermined location, and special auxiliary equipment is usually required to ensure the precise positioning of the robot. In this paper, we present an adaptive blanking robotic system for different lighting environments, which consists of an industrial robot arm, an RGB-D camera configuration, and a customized insole blanking table and mold. We introduce an innovative edge detection framework that utilizes color features and morphological parameters optimized through particle swarm optimization (PSO) techniques to Adaptive recognition of insole edge contours. A path planning framework based on FSPS-BIT* is also introduced, which integrates the BIT* algorithm with the FSPS algorithm for efficient path planning of the robotic arm.
Keyword ：
Adaptive edge detection Adaptive edge detection BIT* BIT* Insole blanking Insole blanking Path planning Path planning Robotic system Robotic system
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| GB/T 7714 | Tang, Rui , Guo, Shirong , Wang, Kunfu et al. A framework of insole blanking robot based on adaptive edge detection and FSPS-BIT* path planning [J]. | SCIENTIFIC REPORTS , 2024 , 14 (1) . |
| MLA | Tang, Rui et al. "A framework of insole blanking robot based on adaptive edge detection and FSPS-BIT* path planning" . | SCIENTIFIC REPORTS 14 . 1 (2024) . |
| APA | Tang, Rui , Guo, Shirong , Wang, Kunfu , Lin, Hongdi , Huang, Lujin , Mou, Gang . A framework of insole blanking robot based on adaptive edge detection and FSPS-BIT* path planning . | SCIENTIFIC REPORTS , 2024 , 14 (1) . |
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The supportfree printing of overhanging structure arouses enormous interest for its advantages to eliminate the need for support removal and to improve the efficiency in laser powder bed fusion (L-PBF) additive manufacturing. However, the improvement of down -facing surface quality remains a significant challenge, where an in-depth understanding of the formation of overhanging tracks is essential. This paper developed a multiphysics model of overhanging tracks in L-PBF to systematically investigate the formation mechanisms of key features such as discontinuity and dross, as well as their correlation with surface roughness. It reveals that there are two main causes of discontinuity of overhanging tracks: the coalescence and balling of the melt under low energy density, and the irregular sinking of melt pool at the overhanging edge. The high energy density could mitigate the occurrence of discontinuous tracks, but it might also lead to undesirable dross upon the complete penetration of the overhanging structure. The relationship between processing parameters, morphological defects and surface roughness were systematically discussed, which revealed the necessity to tailor processing parameters for different overhang angles to improve the down -facing surface quality. Furthermore, the significant correlation between the single-track morphology and the down -facing surface roughness has been demonstrated quantitatively, which proposed a practical way to predict the trend of the down -facing surface quality by single-track simulation. This could help improve the supportfree printing process in metal additive manufacturing.
Keyword ：
Laser powder bed fusion Laser powder bed fusion Multi-physics modeling Multi-physics modeling Overhanging structure Overhanging structure Supportfree printing Supportfree printing Surface roughness Surface roughness
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| GB/T 7714 | Xiang, Hongliang , Zhou, Yulong , Zhang, Xiangkai et al. Supportfree printing in laser powder bed fusion: Formation mechanisms of discontinuity, dross and surface roughness [J]. | OPTICS AND LASER TECHNOLOGY , 2024 , 177 . |
| MLA | Xiang, Hongliang et al. "Supportfree printing in laser powder bed fusion: Formation mechanisms of discontinuity, dross and surface roughness" . | OPTICS AND LASER TECHNOLOGY 177 (2024) . |
| APA | Xiang, Hongliang , Zhou, Yulong , Zhang, Xiangkai , Li, Jie , Huang, Ye , Mou, Gang et al. Supportfree printing in laser powder bed fusion: Formation mechanisms of discontinuity, dross and surface roughness . | OPTICS AND LASER TECHNOLOGY , 2024 , 177 . |
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Ti-steel laminated metal composites have been widely used in shipbuilding and the chemical industry due to the superior corrosion resistance of Ti and the favorable mechanical properties of stainless steel. In this paper, Tisteel laminated metal composites without Ti-Fe IMCs have been fabricated by directed energy deposition-arc method using a Cu-Ni transition interlayer. Based on the analysis of microstructure analysis, the crosssectional microstructure can be divided into 304SS / Cu-Ni interface containing (Fe, Cr) and (Cu) solid solution, Cu-Ni deposition layer containing (Fe, Cr) and (Cu) solid solution, and TA2/Cu-Ni interface containing Ti2FeCu and Ti-Cu IMCs. Besides, the Cu-Ni deposition layer contains a small content of recrystallized grains with {100}<100> texture and a large content of deformed grains with{100}<110> texture due to the impact of arc and droplets during continuous depositions. Furthermore, the peak hardness is decreased to 518 Hv and the mean value of compressive shear strength is enhanced to 195.27 MPa, which can be attributed to the elimination of interfacial Ti-Fe IMCs, defect-free microstructure, and residual stress relief. Based on polarization curves and electrochemical impedance spectroscopy, the corrosion resistance reduction of the cross-section is due to the formation of a mass of primary battery systems. Furthermore, based on the thermodynamics calculation of Fe-CuNi, Ti-Fe-Cu, and Ti-Ni-Cu ternary systems, the alloying mechanism is that Ti-based IMCs with lower Gibbs free energy will be formed instead of brittle Ti-Fe IMCs, resulting in the elimination of Ti-Fe IMCs and the formation of less brittle phases at both 304SS / Cu-Ni interface and TA2 / Cu-Ni interface.
Keyword ：
Additive manufacturing Additive manufacturing Interfacial alloying Interfacial alloying Laminated metal composite Laminated metal composite Mechanical property Mechanical property Microstructure Microstructure
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| GB/T 7714 | Mou, Gang , Sheng, Haiyang , Zheng, Kaikui et al. Dual-interfacial alloying mechanism in Ti-steel laminated metal composite fabricated by wire-arc directed energy deposition using a Cu-Ni interlayer [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 1010 . |
| MLA | Mou, Gang et al. "Dual-interfacial alloying mechanism in Ti-steel laminated metal composite fabricated by wire-arc directed energy deposition using a Cu-Ni interlayer" . | JOURNAL OF ALLOYS AND COMPOUNDS 1010 (2024) . |
| APA | Mou, Gang , Sheng, Haiyang , Zheng, Kaikui , Xiang, Hongliang , Ren, Wenjie , Ding, Yuhan . Dual-interfacial alloying mechanism in Ti-steel laminated metal composite fabricated by wire-arc directed energy deposition using a Cu-Ni interlayer . | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 1010 . |
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利用热弹塑性有限元分析,对材料为Q235钢的重卡结构件激光-GMAW复合焊接的温度场及焊接变形进行数值模拟计算.将平面高斯热源与高斯倒锥体热源结合,建立了适用于激光-GMAW复合焊接的组合热源模型,计算所得的焊缝横截面形状和尺寸与试验吻合较好.对于整个焊接结构的焊接顺序分成多个部分进行规划,包括了两个待焊面的整体先后顺序、局部的焊接起始位置以及焊接路径选择,焊接路径包括顺序焊、分步退焊、跳焊.在结构上选取4条关键路径,并将路径上各点的z方向位移量进行标准差计算,并取平均值,作为整个结构z方向变形程度系数,建立了针对具有复杂变形趋势和变形分布的焊接结构的变形严重程度定量评估方法.将各步骤内的最优方案进行结合,最终得到的最优焊接顺序方案为先焊A面后焊B面,且B面采用跳焊路径,3号位置作为焊接起始位置.最优方案焊接变形程度系数为0.2 mm,与最差焊接方案相比,焊接变形程度系数降低了28.6%.
Keyword ：
激光-GMAW复合焊接 激光-GMAW复合焊接 热弹塑性分析 热弹塑性分析 焊接顺序 焊接顺序 组合式体积热源 组合式体积热源
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| GB/T 7714 | 殷琪安 , 陶武 , 牟刚 et al. 重卡结构件激光-GMAW复合焊接变形数值模拟研究 [J]. | 电焊机 , 2023 , 53 (7) : 16-23 . |
| MLA | 殷琪安 et al. "重卡结构件激光-GMAW复合焊接变形数值模拟研究" . | 电焊机 53 . 7 (2023) : 16-23 . |
| APA | 殷琪安 , 陶武 , 牟刚 , 樊雪 , 任闻杰 , 杨上陆 . 重卡结构件激光-GMAW复合焊接变形数值模拟研究 . | 电焊机 , 2023 , 53 (7) , 16-23 . |
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In this paper, inertia friction welding (IFW) is used to enable a high-quality and efficient joint between 2205 duplex stainless steel and 316 L stainless steel. Specifically, stainless steel bars (2205/316 L) with a diameter of 35 mm and length of 120 mm are used. In addition, the effect of IFW speed on the microstructure and properties of welded joints is assessed using scanning electron microscopy, electron backscattered diffraction, energy dispersive X-ray spectroscopy, microhardness test, and tensile tests. The results indicate that dynamic recrystallization of the microstructure of joints occurs during IFW welding, which causes grain refinement. The diffusion of Ni from the 316 L base metal to the 2205 base metal, as well as the diffusion of Cr from the 2205 base metal to the 316 L base metal, results in a strong metallurgical bond between the two materials. In addition, the microhardness of the welding area exceeds that of the base metal (the closer to the weld zone, the greater the microhardness value). The tensile strength of the joints initially increases with increasing IFW speed, but then it starts decreasing beyond a certain point. The optimal welding parameters for achieving high-quality joints between 2205 duplex stainless steel and 316 L stainless steel are as follows: axial pressure = 5 MPa, rotational inertia = 4.17 kg.m(2), and IFW speed = 2700 r/min.
Keyword ：
Dissimilar stainless steel welding Dissimilar stainless steel welding Inertia friction welding Inertia friction welding Joint microstructures Joint microstructures Mechanical properties Mechanical properties
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| GB/T 7714 | Zheng, Kaikui , Yang, Zike , Mou, Gang . Effect of inertia friction welding speed on microstructure and mechanical properties of 2205/316L stainless steel joints [J]. | MATERIALS TODAY COMMUNICATIONS , 2023 , 35 . |
| MLA | Zheng, Kaikui et al. "Effect of inertia friction welding speed on microstructure and mechanical properties of 2205/316L stainless steel joints" . | MATERIALS TODAY COMMUNICATIONS 35 (2023) . |
| APA | Zheng, Kaikui , Yang, Zike , Mou, Gang . Effect of inertia friction welding speed on microstructure and mechanical properties of 2205/316L stainless steel joints . | MATERIALS TODAY COMMUNICATIONS , 2023 , 35 . |
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Experimental and numerical methods are carried out to analyze the interface formation and defect elimination mechanism during electromagnetic pulse welding T2 to 304L tube by changing the inner tube morphology from original scheme to stage scheme, ramp stage, and location stage. When the original scheme is operated with 13mm lap length, the morphology of interface is divided into four zones containing end unwelded zone, first welded zone, central unwelded zone, and second welded zone due to the different impact velocity and angle during the initial impact process, parallel impact process, and final impact process. The parallel impact leads to the formation of the central unwelded zone, containing (Cu, Fe) solid solution, oxides, nano grains, and amor-phous phase. By providing a suitable impact angle, the ramp scheme (& alpha; = 7 degrees) and location scheme (L = 6.5 mm) can eliminate the defect in the central unwelded zone.
Keyword ：
Defects Defects Deformation and fracture Deformation and fracture Metallic composites Metallic composites Metals and alloys Metals and alloys Welding Welding
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| GB/T 7714 | Mou, Gang , He, Lun , Xiang, Hongliang et al. Interface formation and defect elimination mechanism of T2/304L interface during electromagnetic pulse welding process [J]. | MATERIALS LETTERS , 2023 , 349 . |
| MLA | Mou, Gang et al. "Interface formation and defect elimination mechanism of T2/304L interface during electromagnetic pulse welding process" . | MATERIALS LETTERS 349 (2023) . |
| APA | Mou, Gang , He, Lun , Xiang, Hongliang , Lin, Wanfu . Interface formation and defect elimination mechanism of T2/304L interface during electromagnetic pulse welding process . | MATERIALS LETTERS , 2023 , 349 . |
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