锆合金表面耐事故涂层研究进展
作者：
曹殿鹏;邹树梁;肖魏魏;唐德文
期刊：
核科学与工程 ,2020年40(2):264-272 ISSN：0258-0918
作者机构：
南华大学 核设施应急安全技术与装备湖南省重点实验室,湖南 衡阳 421001;中国核工业集团有限公司,北京 100822;南华大学 机械工程学院,湖南 衡阳 421001;[曹殿鹏; 唐德文; 邹树梁; 肖魏魏] 南华大学
关键词：
锆合金;耐事故涂层;涂层材料;制备工艺;性能表征
摘要：
锆合金表面涂层是核电耐事故燃料研究的一个重要技术途径。本文综述了福岛事故后锆合金包壳外表面耐事故涂层的研究进展,依据涂层制备中的涂层材料、制备工艺、涂层性能表征等关键问题逐次展开。首先介绍用于核电锆合金表面的涂层材料,主要包括金属涂层、陶瓷类涂层、合金涂层和多层复合涂层。其次,介绍用于锆合金表面耐事故涂层的制备工艺,主要包括冷喷涂、离子镀、磁控溅射和其他种类的制备工艺。最后,介绍锆合金表面耐事故涂层性能表征方法以及涂层材料和制备工艺对涂层性能影响的研究工作,涂层性能包括涂层表面完整性和关键堆外性能两个方面。本研究进展可为进一步研究与开发锆合金表面耐事故涂层提供重要参考。
语种：
中文
展开
Sputtering parameters effect on microstructural parameters of TiN coating via the Williamson-Hall analysis
作者：
Huang, Jinghao;Zou, Shuliang;Xiao, Weiwei* ;Liu, Xiaoshuang;Tang, Dewen
期刊：
Materials Research Express ,2020年7(10):106402 ISSN：2053-1591
通讯作者：
Xiao, Weiwei
作者机构：
[Huang, Jinghao; Zou, Shuliang] Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.;[Huang, Jinghao; Liu, Xiaoshuang; Zou, Shuliang; Xiao, Weiwei; Tang, Dewen] Univ South China, Hunan Prov Key Lab Emergency Safety Technol & Equ, Hengyang 421001, Hunan, Peoples R China.;[Liu, Xiaoshuang; Xiao, Weiwei; Tang, Dewen] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Xiao, Weiwei] U;Univ South China, Hunan Prov Key Lab Emergency Safety Technol & Equ, Hengyang 421001, Hunan, Peoples R China.;Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.
关键词：
Coatings;Crystals;Deformation;Grain size and shape;Magnetron sputtering;Zirconium compounds;Deformation modeling;Direct current magnetron sputtering;Micro-structural properties;Microstructural parameters;Sputtering parameters;Substrate temperature;Uniform energy densities;Williamson-hall analysis;Titanium nitride
摘要：
Titanium nitride (TiN) coatings were deposited on Zr-4 substrate by direct current magnetron sputtering. The microstructural property of the as-deposited coating was studied by means of x-ray diffraction (XRD). The microstructural parameters, such as crystal size, lattice strain, lattice deformation stress and lattice deformation energy density, were investigated in detail by employed modified Debye–Scherrer method (MDS) and Williamson-Hall methods by assuming three models namely uniform deformation model, uniform stress deformation model and uniform energy density deformation model. And the effects of sputtering power, substrate temperature and substrate bias on microstructural parameters were investigated. The results show that TiN coating deposited by magnetron sputtering presents lattice compressive strain, except for sample X3-1 which is prepared by substrate bias of −50 V. It is also shown that sputtering power, substrate temperature and substrate bias have great influence on crystal size, lattice strain, lattice deformation stress and lattice deformation energy density of the as-deposited TiN coating. Especially the influence of substrate bias is very significant. © 2020 The Author(s). Published by IOP Publishing Ltd
语种：
英文
展开
高速铣削304不锈钢铣削力及表面粗糙度研究
作者：
唐海龙;唐德文;刘小双;唐旭凤
期刊：
机械工程与自动化 ,2020年(06):19-20,24 ISSN：1672-6413
作者机构：
南华大学机械工程学院,湖南衡阳421001;湖南省核燃料循环技术与装备协同创新中心,湖南衡阳421001;[刘小双; 唐德文; 唐旭凤; 唐海龙] 南华大学
关键词：
铣削力;高速铣削;304不锈钢;表面粗糙度
摘要：
采用TiAlN涂层刀具高速铣削304不锈钢,研究铣削参数对铣削力与加工表面粗糙度的影响规律.用最小二乘法对正交实验结果进行回归分析,建立铣削力及加工表面粗糙度与切削参数之间的经验模型.分析结果表明:切削力受径向切削深度的影响最大,受进给量的影响最小;工件表面粗糙度受切削深度的影响最大,受切削速度的影响最小.铣削参数选取轴向切削深度为0.7 mm～0.8 mm、进给量为0.10 mm/r～0.15 mm/r、铣削速度为450 m/min～500 m/min、径向切削深度为2 mm～3 mm最为合适.
语种：
中文
展开
控制工程教学过程中网络课程与传统课堂教学模式的融合研究
作者：
郑雪飞;郭剑;唐德文
期刊：
科教导刊-电子版(上旬) ,2020年(7):140 ISSN：2097-1621
作者机构：
南华大学机械工程学院 湖南·衡阳 421001;[郭剑; 唐德文; 郑雪飞] 南华大学
关键词：
控制工程;网络课程;传统课堂教学模式
摘要：
文章根据《控制工程》课程的特点,针对本专业学生在实际教学中出现的问题,以培养学生机电控制系统设计和分析能力为目标,在教学过程中将网络课程与传统课堂教学模式相融合,对教学方法和教学内容进行了改革与研究.
语种：
中文
展开
基于零件关键特征的增材制造打印方向优化
作者：
陈金友;唐德文
期刊：
重庆理工大学学报(自然科学) ,2020年34(10):111-117 ISSN：1674-8425
作者机构：
湖南财经工业职业技术学院,湖南 衡阳 421002;天津职业技术师范大学,天津 300222;南华大学机械工程学院,湖南 衡阳 421001;[唐德文] 南华大学;[陈金友] 湖南财经工业职业技术学院
关键词：
增材制造;打印方向;遗传算法;关键特征
摘要：
零件的装配面或工作面等关键特征的表面质量和打印时间是增材制造打印方向优化的两个重要指标。针对增材制造打印方向优化问题,提出了一种基于零件关键特征的打印方向多目标优化算法,考虑2个因素:关键特征表面质量和打印时间。首先,对零件的三角网格模型进行区域分割,并对关键特征进行提取;然后,对关键特征表面质量、打印时间分别进行数学建模;最后,利用非支配排序遗传算法求解零件打印方向优化问题,得到Pareto域最优解集。相较于考虑整体平均表面粗糙度的传统算法,采用文中提出的算法,测试零件关键特征平均表面粗糙度平均减小69. 56%。该算法能有效保证零件关键特征的表面质量,且打印稳定性优于传统算法。
语种：
中文
展开
Influences of W contents on microstructures, mechanical properties and the shielding performance for neutrons and γ-rays of Fe–W–C alloy
作者：
Tang Dewen* ;Liu Xiaoshuang;Xiao Weiwei
期刊：
Journal of Alloys and Compounds ,2020年827:153932 ISSN：0925-8388
通讯作者：
Tang Dewen
作者机构：
[Liu Xiaoshuang; Tang Dewen; Xiao Weiwei] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.;[Tang Dewen] Univ South China, Hunan Prov Key Lab Emergency Safety Technol & Equ, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Tang Dewen] U;Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.
关键词：
Binding energy;Compaction;Fracture;Gamma rays;Liquid phase sintering;Mechanical alloying;Metal testing;Microstructural evolution;Microstructure;Scanning electron microscopy;Shielding;Tensile strength;Tensile testing;Ductile and brittle fractures;Energy dispersive spectrometry;Mechanical performance;Neutron shielding simulations;Shielding performance;Sintering atmospheres;Strength and ductilities;Tensile fracture surfaces;Iron alloys
摘要：
Shielding materials, Fe–W–C alloy (wt.%) with the different tungsten content and higher density was successfully prepared by powder metallurgical processing sequences comprising of mechanical alloying, compaction and liquid phase sintering. The process parameters such as mechanical alloying conditions, compaction pressure, sintering atmosphere, and sintering schedule were optimized to achieve the desired sintered density. The synthesized alloy was characterized for the evolution of microstructure, phases and mechanical properties using scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), tensile testing, X-Ray diffraction (XRD), etc. The sintered alloy was found to comprise with the matrix phase a-Fe and the binding phases such as Fe2W2C, Fe6W6C and Fe2W. Extensive, EDS analysis revealed the distribution of Fe, W and C element in the matrix phase, binding phase and blocky binding zone, respectively. W contents altered the density and microstructure of the alloy significantly. The tensile strength and ductility of the as-sintered Fe–W–C alloy was found to be 345 MPa and 17.5%, respectively. SEM characterization of the tensile-fracture surface showed mixed mode of fracture, i.e. ductile and brittle fracture in α-Fe and W particles, respectively. The γ-ray shielding performance of the alloys was carried out by BH1326 γ-ray shielding tester, and the half-attenuation thickness of alloy containing 16% W was the minimum, about 8.5 mm. The results of neutron shielding simulation show that the transmission of the neutron shield of alloy Fe–W–C containing 16% W was the minimum. © 2020
语种：
英文
展开
基于中心复合响应曲面法的42CrMo高速铣削试验分析
作者：
张家雨;唐德文;邹树梁;彭宇声
期刊：
制造技术与机床 ,2019年(2):94-100 ISSN：1005-2402
作者机构：
南华大学机械工程学院,湖南衡阳,421001;江苏大学机械工程学院,江苏镇江,212013;[张家雨; 唐德文; 邹树梁] 南华大学;[彭宇声] 江苏大学
关键词：
响应曲面法;预测模型;遗传算法;Pareto最优域
摘要：
基于中心复合响应曲面法对42CrMo进行铣削试验,建立了铣削力分量与表面粗糙度的二阶响应预测模型,运用统计学方法对预测模型进行统计学检验,检验结果表明各预测模型的显著性较高,试验值与预测值的拟合程度良好。运用遗传算法对预测模型进行非线性多目标优化,获得了Pareto最优域,构建了Pareto最优前沿图,以优化铣削参数。试验结果表明:轴向切深对各铣削力分量的影响最大,对表面粗糙度影响最大是每转进给量,主轴转速与每转进给量的交互项对表面粗糙度也有显著性影响。最后对优化的铣削参数进行实验验证,验证结论表明总体优化预测结果良好。
语种：
中文
展开
W-Al-B4C复合材料的制备及性能研究
作者：
王利伟;唐德文;邹树梁
期刊：
金属材料与冶金工程 ,2019年47(3):8-13 ISSN：2095-5014
作者机构：
南华大学机械工程学院,湖南衡阳,421000;[唐德文; 邹树梁; 王利伟] 南华大学
关键词：
真空烧结;复合材料;微观组织;物相;密度;透射率
摘要：
通过粉末冶金法和真空烧结的方式制备了不同钨含量的W-Al-B4C复合材料,采用DM2700Leica金相显微镜和X射线衍射仪(XRD)对复合材料的微观组织及物相进行了观察分析,采用阿基米德排水法测量了W-A1-B4C复合材料的密度,采用MCNP程序对复合材料进行了γ射线屏蔽性能的模拟.结果 表明:不同钨含量的复合材料中钨和碳化硼颗粒都较均匀的分布于铝基体中,彼此结合良好,材料致密,各相之间结合良好,没有出现较大的缺陷;不同钨含量的复合材料的衍射峰基本上相同,无偏移现象,没有发生合金化反应;随着钨含量的增加,复合材料的理论密度在逐渐增加,而实际测量密度随着钨含量的增加呈先增加后逐渐减小的趋势,当钨含量为10％时,测得复合材料的密度最大为1.798 3 g/cm3;复合材料的透射率随着钨含量的增加呈指数衰减趋势,随着钨含量的增加,复合材料对γ射线的屏蔽性能在不断提高,当钨含量大于10％时,复合材料对γ射线几乎达到完全屏蔽的效果.
语种：
中文
展开
Influence of boron contents on microstructure, mechanical properties and shielding effect of Fe–W–C alloy
作者：
Tang Dewen* ;Zou Shuliang;Yan Liang
期刊：
Journal of Alloys and Compounds ,2019年803:466-475 ISSN：0925-8388
通讯作者：
Tang Dewen
作者机构：
[Tang Dewen; Yan Liang] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.;[Zou Shuliang; Tang Dewen] Univ South China, Hunan Prov Key Lab Emergency Safety Technol & Equ, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Tang Dewen] U;Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.
关键词：
Brittle fracture;Gamma rays;Hardness;Mechanical properties;Microstructure;Shielding;Sintering;Tensile strength;Vacuum applications;Compact microstructure;Gamma-ray shielding;Network microstructures;Research results;Shielding effect;Shielding materials;Shielding performance;Vacuum sintering;Iron alloys
摘要：
By using vacuum sintering method, the shielding materials made of iron-tungsten-carbon-boron (Fe–W–C–B) alloys with different boron (B) contents were prepared. The influences of different B contents on mechanical properties, shielding performance and microstructures of the alloys were investigated. The research results showed that with increasing B content, the fracture of alloys changed from plastic to brittle fractures and the higher the B content was, the more serious the brittle fracture. Moreover, the content of brittle amorphous phase FeWB increased and therefore the hardness and density of alloys increased at first and then reduced. When the B content was 2.5%, the alloy phase was mainly composed of Fe2B, Fe3(C, B) and α-Fe phases, with compact microstructure, shown as continuous network microstructure and tiny, long, round rod-like microstructure. In this case, the density, tensile strength and hardness of alloys were 10.05 g/cm3, 410 MPa and 468 HV, respectively. The γ-ray shielding performance of the alloy reduced at first, then increased and finally declined with the increase of B contents. When the B content was 1.5%, the half-value thickness reached to the minimum (about 6.36 mm). The transmittance of neutron shields reduced at first and then increased in a low-energy zone (0–4 MeV). When the B content was 2.5%, the alloys showed the lowest transmittance about 0.10842. © 2019 Elsevier B.V.
语种：
英文
展开
金属表面磁控溅射TiN涂层制备的实验方法
作者：
肖魏魏;唐德文
期刊：
信息记录材料 ,2019年20(7):18-19 ISSN：1009-5624
作者机构：
南华大学机械工程学院 湖南 衡阳 421001;[唐德文; 肖魏魏] 南华大学
关键词：
磁控溅射;金属材料;TiN涂层;实验教学
摘要：
锆合金由于中子吸收截面小等优点被广泛应用于核电行业。为了进一步提高其耐腐蚀性能和耐高温氧化性能,可采用表面涂层工艺。本文采用磁控溅射工艺在锆合金表面制备TiN涂层,并测试涂层的表面形貌和结合强度,应用于金属表面涂层制备的认知性和延伸性实验教学,使学生在实践中掌握材料表面处理学术前沿知识,培养创新思维,提高分析、解决问题的能力。
语种：
中文
展开
基于LabVIEW的核燃料组件图像倾斜处理技术研究
作者：
李强;任宇宏;邹树梁;唐德文;张家雨
期刊：
机械工程与自动化 ,2019年(1):24-26,30 ISSN：1672-6413
作者机构：
南华大学 机械工程学院,湖南 衡阳 421001;南华大学 核设施应急安全作业技术与装备湖南省重点实验室,湖南 衡阳 421001;中核建中核燃料元件有限公司,四川 宜宾 644000;[李强; 张家雨; 唐德文; 任宇宏; 邹树梁] 南华大学
关键词：
核燃料组件;图像;倾斜检测;倾斜校正
摘要：
提出了一种基于LabVIEW的高精度、高效率的燃料组件图像倾斜处理方法。对获取的倾斜的燃料组件图像进行ROI区域选取、图像掩膜、图像灰度化、图像二值化和高级形态学凸包等预处理,使得燃料组件图像变得更加清晰。使用搜索特征点的方法判断图像的倾斜方向,通过最小二乘法拟合直线得出图像的倾斜角,通过旋转矩阵对图像进行倾斜校正。由于此方法通过选取感兴趣的区域缩小了处理的图像面积,因此针对性更强、效率更高。实验结果表明该技术有效地校正了倾斜的燃料组件图像,并且提高了燃料组件棒间距测量的精度。
语种：
中文
展开
Substrate bias effects on mechanical properties and high temperature oxidation performance of sputtered TiN-coated Zr-4
作者：
Tang, Dewen;Chen, Huiqin;Xiao, Weiwei* ;Deng, Hua* ;Zou, Shuliang;...
期刊：
Journal of Nuclear Materials ,2019年524:330-339 ISSN：0022-3115
通讯作者：
Xiao, Weiwei;Deng, Hua
作者机构：
[Xiao, Weiwei; Chen, Huiqin; Tang, Dewen] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.;[Xiao, Weiwei; Zou, Shuliang; Tang, Dewen] Univ South China, Hunan Prov Key Lab Emergency Safety Technol & Equ, Hengyang 421001, Hunan, Peoples R China.;[Ren, Yuhong; Deng, Hua; Zhou, Xi; Lei, Ming; Xiao, Weiwei] CNNC Jianzhong Nucl Fuel Corp, Yibin 644000, Sichuan, Peoples R China.
通讯机构：
[Xiao, Weiwei] U;[Deng, Hua] C;Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.;CNNC Jianzhong Nucl Fuel Corp, Yibin 644000, Sichuan, Peoples R China.
关键词：
Adhesion;Coatings;Mechanical properties;Metal testing;Residual stresses;Scanning electron microscopy;Tensile testing;Thermooxidation;Titanium nitride;X ray diffraction;Zircaloy;Compressive residual stress;Cross-sectional SEM image;Crystalline structure;Different substrates;Substrate bias;Substrate bias effects;TiN coating;X ray diffractometers;High temperature effects
摘要：
This study is aimed to investigate the influence of substrate bias on mechanical properties and high temperature oxidation of sputtered TiN coating which is prepared on the surface of Zr-4 alloy. The microstructures of coatings were characterized by using scanning electron microscope (SEM) and X-ray diffractometer (XRD). The thicknesses of coatings were detected by examining the cross-sectional SEM image. The adhesion property was tested by using scratch testing. The residual stress was measured by using the XRD method. The tensile property was evaluated by standard tensile test. And the high temperature oxidation performance in air condition was also assessed. It was revealed that substrate bias has a significant influence on crystalline structure, surface micromorphology, thickness, adhesion strength, and residual stress. Nevertheless, tensile property and high temperature oxidation performance are affected by substrate bias indistinctively. From the cross-sectional SEM image, it can be found that thicker coating can be obtained in unit time with a lower substrate bias. The adhesion property does not vary monotonically with increasing negative substrate bias and the coating deposited with −100 V possesses highest critical load. The sputtered TiN coatings demonstrate a compressive residual stress and the magnitude of residual stress of coatings prepared with −200 V and −300 V is higher than that of coatings prepared with −50 V and −100 V. The tensile test reveals that there is no obvious difference between tensile properties of TiN-coated specimens prepared with different substrate bias and the Zr-4 alloy specimen. And the weight gains of high temperature oxidation of TiN-coated specimens with different substrate bias are almost the same and are lower than uncoated Zr-4 alloy specimen. The XRD and EDS results show that TiN coating is oxidized and cracked and the internal Zr-4 substrate is also oxidized when the specimen is exposed to high temperature circumstance for a long time. © 2019 Elsevier B.V.
语种：
英文
展开
Thermal shock resistance of TiN-, Cr-, and TiN/Cr-coated zirconium alloy
作者：
Xiao, Weiwei* ;Chen, Huiqin;Liu, Xiaoshuang;Tang, Dewen;Deng, Hua* ;...
期刊：
Journal of Nuclear Materials ,2019年526:151777 ISSN：0022-3115
通讯作者：
Xiao, Weiwei;Deng, Hua
作者机构：
[Liu, Xiaoshuang; Xiao, Weiwei; Chen, Huiqin; Tang, Dewen] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.;[Liu, Xiaoshuang; Xiao, Weiwei; Zou, Shuliang; Chen, Huiqin; Tang, Dewen] Univ South China, Hunan Prov Key Lab Emergency Safety Technol & Equ, Hengyang 421001, Hunan, Peoples R China.;[Xiao, WW; Deng, Hua; Ren, Yuhong; Zhou, Xi; Lei, Ming; Xiao, Weiwei] CNNC Jianzhong Nucl Fuel Corp, Yibin 644000, Sichuan, Peoples R China.
通讯机构：
[Xiao, Weiwei] U;[Xiao, WW; Deng, H] C;Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.;CNNC Jianzhong Nucl Fuel Corp, Yibin 644000, Sichuan, Peoples R China.
关键词：
Accidents;Adhesion;Coatings;Internal oxidation;Morphology;Scanning electron microscopy;Spectrometers;Surface morphology;Thermal expansion;Thermal shock;Tin alloys;Titanium nitride;X ray diffraction;Zircaloy;Zirconia;Accident tolerant fuels;Cross-sectional SEM image;Direct current magnetron sputtering;Energy dispersive spectrometers;Micro-structural properties;Sputtered coatings;Thermal shock resistance;Zr alloys;Titanium alloys
摘要：
As a candidate technology for accident tolerant fuel (ATF), surface modified Zr cladding has captured the interest of an army of nuclear workers in the past few years. In this paper, three coatings (TiN, Cr, and TiN/Cr) were deposited on Zr-4 by direct current magnetron sputtering. The microstructural properties of the three coatings were detected by using scanning electron microscope (SEM) and X-ray diffraction (XRD). The thickness of coating was determined by examining the cross sectional SEM image. The adhesion properties of was characterized by using scratch testing. The thermal shock resistance (TSR) tests were carried out in three temperature variations, that is, △T = 800 °C, 1000 °C, and 1200 °C, respectively. After the TSR test, the surface morphology of the tested specimens was observed, XRD, SEM and energy dispersive spectrometer (EDS) were used to examine the microstructural properties of the tested specimens, and scratch testing was executed to determine the adhesion properties. The results show that TiN coating was partially peeled off and the inner zirconium alloy was oxidized. And the thickness of the generated ZrO2 layer is about 50 μm. The specimens coated with single Cr coating remained intact. The cross-sectional analysis result show that only about 30% of Cr coating is oxidized, and the residual Cr coating and inner zirconium alloy are not oxidized. It is mainly due to the dense and uniform structure of Cr2O3 formed by the oxidation of the outermost layer of Cr coating, which prevents the further penetration of oxygen into the interior and plays a very prominent protective role. For the bilayer TiN/Cr-coated specimens, the coefficient of thermal expansion (CTE) of intermediate TiN layer is different from that of zirconium alloy substrate. After TSR test, cracks and a large number of pores appear, and there are obvious gaps between the bulk oxidation products, which leads to poor protection of the internal materials. It indicates that the zirconium alloy coated with a single Cr coating has excellent TSR property. © 2019 Elsevier B.V.
语种：
英文
展开
机电综合实训虚拟仿真教学平台建设实践
作者：
冯栋彦;唐德文;唐永辉;刘军;张莹
期刊：
新教育时代(电子杂志) ,2019年(41):142-143 ISSN：2095-4743
作者机构：
南华大学 机械工程学院 湖南衡阳 421001;[刘军; 唐德文; 冯栋彦; 唐永辉; 张莹] 南华大学
关键词：
实践教学;综合实训;虚拟仿真;专业认证
摘要：
针对"专业认证"对培养学生综合复杂工程问题的要求,整合各专业基础课程实践环节,在现有校企合作实验室的基础上,建立针对典型核电零部件的设计、建模仿真、制造、装配、检测和机电控制为一体的虚拟仿真系统,开设具有行业特色的机、电等学科的综合实训项目.学生可对典型核电装备零件进行虚拟设计、仿真、加工、检测和组装,同时完成机电一体化系统的电气控制,培养综合机械素养.机电综合实训虚拟仿真教学平台建设是满足专业认证要求的有效途径,也是新工科"问技术发展改内容"的一种尝试.
语种：
中文
展开
基于ABAQUS的钛合金高速切削有限元模拟
作者：
张家雨;唐德文;彭聪;李强
期刊：
机械工程与自动化 ,2018年(2):73-75 ISSN：1672-6413
作者机构：
南华大学机械工程学院,湖南衡阳,421001;[彭聪; 李强; 张家雨; 唐德文] 南华大学
关键词：
高速切削;切削力;钛合金;有限元
摘要：
基于有限元分析软件ABAQUS建立了高速切削Ti6Al4V的二维正交切削有限元模型,仿真研究了高速切削加工时切削速度、切削深度对切削力大小、切削力波动频率以及锯齿形切屑形态的影响.结果表明:平均切削力在90 m/min～360 m/min的切削速度范围内趋于平稳,随着切削深度的增大而增大;切削力波动频率随切削深度的增加而减小,随切削速度的增大而增大;切屑锯齿化程度及锯齿化步距都随切削速度及切削深度的增大而增大.
语种：
中文
展开
Research on the preparation and shielding properties of W–Ni–Fe alloy material by liquid phase sintering
作者：
Tang Dewen* ;Zou Shuliang;Yan Liang
期刊：
Powder Metallurgy ,2018年61(1):28-35 ISSN：0032-5899
通讯作者：
Tang Dewen
作者机构：
[Tang Dewen; Yan Liang] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.;[Zou Shuliang; Tang Dewen] Univ South China, Hunan Prov Key Lab Emergency Safety Technol & Equ, Hengyang, Peoples R China.
通讯机构：
[Tang Dewen] U;Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
关键词：
W–Ni–Fe series alloy;liquid phase sintering;mechanical properties;microstructure;shielding effect
摘要：
Traditional and single shielding material has not satisfied the demand for radiation protection. Shielding materials with a good comprehensive performance have attracted attention. W–Ni–Fe alloys with different Ni/Fe ratios have been prepared through liquid phase sintering using W, Ni and Fe elementary powders. The microstructure, morphology and fracture appearance of such prepared W–Ni–Fe alloys with different Ni/Fe ratios were analysed with the SEM and metallographic test. The effects of the Ni/Fe ratio on the density, microhardness, tensile strength and shielding efficiency were investigated. The results show that for W–Ni–Fe alloys with different Ni/Fe ratios, the alloy surfaces are composed of ellipsoidal W particles on a Ni–Fe substrate. However, when the Ni/Fe ratio is 7:3, uniform and spherical W crystals are embedded in the Ni–Fe substrate and evidently form dense boundaries, which contribute to the good mechanical properties and shielding effect of the alloy.<br/> ©2017 Institute of Materials, Minerals and Mining Published by Taylor & Francis on behalf of the Institute.
语种：
英文
展开
Effect of roughness of substrate and sputtering power on the properties of TiN coatings deposited by magnetron sputtering for ATF
作者：
Xiao, Weiwei* ;Deng, Hua* ;Zou, Shuliang;Ren, Yuhong;Tang, Dewen;...
期刊：
Journal of Nuclear Materials ,2018年509:542-549 ISSN：0022-3115
通讯作者：
Xiao, Weiwei;Deng, Hua
作者机构：
[Xiao, Changfei; Xiao, Weiwei; Zou, Shuliang; Tang, Dewen] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.;[Ren, Yuhong; Deng, Hua; Zhou, Xi; Lei, Ming; Xiao, Weiwei; Chen, Yao] CNNC Jianzhong Nucl Fuel Co, Yibin 644000, Sichuan, Peoples R China.
通讯机构：
[Xiao, Weiwei] U;[Deng, Hua] C;Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.;CNNC Jianzhong Nucl Fuel Co, Yibin 644000, Sichuan, Peoples R China.
关键词：
Adhesion;Bond strength (materials);Magnetron sputtering;Microstructure;Residual stresses;Scanning electron microscopy;Substrates;Surface roughness;Tin;Titanium nitride;X ray diffraction;Zirconium compounds;Accident tolerant fuels;Adhesion properties;Direct current magnetron sputtering;Roughness of substrates;Sputtering power;Stress magnitude;TiN coating;X ray diffractometers;Coatings
摘要：
TiN coatings have been deposited on Zr-4 substrates using direct current (DC) magnetron sputtering and the effects of roughness of substrate and sputtering power on the microstructure, thickness/deposition rate, adhesion properties and residual stress of coatings have been studied. The microstructures of the coatings were characterized by using scanning electron microscope (SEM) and X-ray diffractometer (XRD). The thicknesses of the coatings were detected by using SEM. The adhesion property was tested by using scratch testing. The residual stress was measured by using the XRD method. The results shown that the microstructure, thickness/deposition rate, adhesion properties and residual stress of coating are significantly influenced by the roughness of substrate and sputtering power. The roughness of substrate has significant influence on the surface micrograph of the coating but not obvious on the thickness/deposition rate. The microstructure, thickness/deposition rate is remarkably affected by the sputtering power. In addition, the adhesion property does not vary monotonically with the roughness of substrate and the sputtering power. The adhesion strength presents a trend of first rises and then declines with the increase of surface roughness of substrate and sputtering power. The residual stresses of the coating were compressive and the residual stress magnitude of the coatings deposited by relatively low sputtering power was higher than that deposited by relatively high sputtering power. © 2018 Elsevier B.V.
语种：
英文
展开
Finite element simulation of high-speed finish milling of SKD11 hardened steel based on modified constitutive equation
作者：
Tang Dewen* ;Peng Cong;Zhang Jiayu;Rubina Bahar
期刊：
Cogent Engineering ,2018年5(1):Article: 1482589 ISSN：2331-1916
通讯作者：
Tang Dewen
作者机构：
School of mechanical engineering, University of South China , Hunan, China;[Peng Cong; Zhang Jiayu] Hunan Provincial Key Laboratory of Emergency Safety Technology and Equipment for Nuclear Facilities, University of South China , Hunan, China;[Rubina Bahar] International Islamic University Malaysia , Malaysia;[Tang Dewen] School of mechanical engineering, University of South China , Hunan, China ;[Tang Dewen] Hunan Provincial Key Laboratory of Emergency Safety Technology and Equipment for Nuclear Facilities, University of South China , Hunan, China
通讯机构：
[Tang Dewen] S;School of mechanical engineering, University of South China , Hunan, China;Hunan Provincial Key Laboratory of Emergency Safety Technology and Equipment for Nuclear Facilities, University of South China , Hunan, China
关键词：
cutting depth;cutting speed;Finite element simulation;hardened steel SKD11;high-speed finish milling;tool-tip radius
摘要：
High precision parts have been widely used in automobile, aerospace, medical and other fields. Conventional machining methods are difficult to meet the requirements of the high-quality requirements of components, including shape precision, dimensional accuracy, surface finish and surface integrity. Using milling instead of grinding can significantly improve machining efficiency of ultra-precision parts for difficult cut materials, especially high hardness SKD11 hardened steel. To improve the surface quality and the processing surface integrity of the parts, high-speed milling (HSM) can be able to meet the high-quality requirements of components. However, the quality of finish HSM is difficult to control through experiments. Therefore, the modified flow stress model of SKD11 hardened steel based on SHPB experimental is adopted to simulate the high-speed finish milling in this paper. The effect of cutting parameters on chip formation, cutting temperature, stress and cutting force of SKD11 are analyzed. Compared with the experimental data of cutting force of different cutting parameters, the simulation results are the same as the measured data. The results show that the model can predict the performance of the SKD11 high-speed finish milling process accurately. © 2018, © 2018 The Author(s). This open access article is distributed under a Creative Commons Attribution (CC-BY) 4.0 license.
语种：
英文
展开
基于真空烧结的Al—B4C中子吸收材料的制备及性能研究
作者：
李奎江;邹树梁;唐德文;肖畅飞;刘昌福
期刊：
南华大学学报(自然科学版) ,2018年32(5):70-75 ISSN：1673-0062
作者机构：
南华大学 核设施应急安全作业技术与装备湖南省重点实验室,湖南 衡阳 421001;南华大学 机械工程学院,湖南 衡阳 421001;南华大学 核设施应急安全作业技术与装备湖南省重点实验室,湖南 衡阳,421001;[刘昌福; 唐德文; 肖畅飞; 邹树梁; 李奎江] 南华大学
关键词：
Al-B4C复合材料;真空烧结;微观组织;力学性能
摘要：
B4 C是一种常见的中子吸收材料,采用真空烧结的方法制备不同成分配比的Al-B4 C复合材料,并对材料的微观组织,力学性能进行分析,研究结果表明:基体Al相和增强相B4 C颗粒之间分布比较均匀,气孔裂纹等缺陷较少,复合材料抗拉强度,屈服强度,断后伸长率随着碳化硼含量的增加逐渐减小,复合材料的断裂方式既有B4 C颗粒的解理断裂,也有铝基体的韧性撕裂,以B4 C颗粒的断裂和拔出为主,是韧性断裂与脆性断裂综合作用的结果.
语种：
中文
展开
离子注入304不锈钢表面耐腐蚀性的研究
作者：
袁联雄;唐德文;邹树梁;何志锋;周雄锋
期刊：
热加工工艺 ,2017年46(8):170-174 ISSN：1001-3814
作者机构：
南华大学机械工程学院, 核设施应急安全技术与装备湖南省重点实验室, 湖南, 衡阳, 421001;南华大学, 核设施应急安全技术与装备湖南省重点实验室, 湖南, 衡阳, 421001;[袁联雄; 唐德文; 何志锋; 周雄锋] 南华大学机械工程学院, 核设施应急安全技术与装备湖南省重点实验室, 湖南, 衡阳, 421001;[邹树梁] 南华大学, 核设施应急安全技术与装备湖南省重点实验室, 湖南, 衡阳, 421001
关键词：
304不锈钢;离子注入;耐腐蚀性
摘要：
采用先进的等离子注入技术,对304不锈钢分别进行N、Ti、Al离子注入,对比研究了304不锈钢注入不同种离子后的表面耐腐蚀性。研究了离子注入后各试样的表面微观形貌、物相成分和电化学腐蚀性。结果表明:离子注入304不锈钢的表面组织平整、致密。但随着注入剂量的增大,表面光洁度降低, 形成多孔形貌; 适量的离子注入剂量可获得非晶态注入层,形成单相过饱和固溶体,提高不锈钢的耐腐蚀性;相较两种注入剂量,剂量为5×10~(17)ions/cm~2的各离子注入试样,耐腐蚀性提高;而相同剂量的各离子注入试样, Ti离子注入的效果最好,相比304不锈钢基材,耐腐蚀性能约提高了72%(剂量为5×10~(17) ions/cm~2), 其次是注入N,耐腐蚀性约提高了59%(剂量为5×10~(17)ions/cm~2)。
语种：
中文
展开
