检索结果-南通市图书馆

A Theoretical Processing Map for Laser Cladding： Experimental validation with Laser Cladding of ti-6ai-4v Powder on a ti-6ai-4v Substrate

在线全文

学校读者我要写书评

暂无评论

Journal of Physical Science and Application 2013年第5期3卷 287-294页

作者： Ryan Cottam tim Barry Milan Brandt Industrial Laser Applications Laboratory IRIS Faculty of Engineering and Industrial Sciences Swinburne University of Technology Hawthorn Victoria 3122 Australia School of Aerospace Mechanical and Manufacturing Engineering RMIT University Bundoora Melbourne Victoria 3001Australia Oefence Materials Technology Centre Victoria 3122 Australia

A theoretical processing map for the laser cladding of ti-6ai-4v powder on a ti-6ai-4v substrate was developed. The map was constructed with the aid of a new analytical model for laser cladding, which is detailed in this paper. The map is a series of loci that relate laser traversing speed with laser power for a given melt pool depth and clad height. Several of the developed parameters were experimentally trialled on ti-6Al-4v clad on ti-6Al-4v and produced clads of sound metallurgical quality. These maps would be useful for industrial engineers developing new cladding procedures or the research engineer developing understanding of the fundamental aspects of laser cladding. Additive manufacturing or laser engineered net shaping （LENS） could also use this type of map for the development of process parameters.

关键词： Laser cladding ti-6ai-4v process modeling processing map.

氮离子注入ti-6ai-4v合金的力学性能

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

钛工业进展 1996年第1期 26-27页

作者：夏耀勤

德国俄斯伯格(Augsburg)大学物理研究所的研究人员利用俄歇电子光谱法、卢瑟福反向散射光谱测定法、扫描电子显微镜,能量散射X射线分析、激光扫描聚焦显微镜等各种分析技术,研究了用高能量氮离子和通量为10离子/cm~2、10离子/cm~2的离... 详细信息

德国俄斯伯格(Augsburg)大学物理研究所的研究人员利用俄歇电子光谱法、卢瑟福反向散射光谱测定法、扫描电子显微镜,能量散射X射线分析、激光扫描聚焦显微镜等各种分析技术,研究了用高能量氮离子和通量为10离子/cm~2、10离子/cm~2的离子注入ti-6Al-4v合金的表面形态,化学成分、离子注入层深度和力学性能,RauschenbachB.研究者对25mm×25mm×1mm ti-6Al-

关键词：氮离子 ti-6ai-4v 力学性能 ai

SiC_f/ti-6Al-4v复合材料的界面研究(英文)

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

稀有金属材料与工程 2006年第10期35卷 1516-1521页

作者：杨延清马志军吕祥鸿李健康陈彦艾云龙西北工业大学凝固技术国家重点实验室陕西西安710072 南昌航空工业学院材料工程学院江西南昌330034

采用扫描电镜、透射电镜和X射线衍射仪研究了用中国制备SiC纤维增强的ti-6Al-4v复合材料的界面反应,发现在SiC纤维的C涂层和ti-6Al-4v基体之间形成的界面反应产物为细晶粒和粗晶粒的tiC,而无C涂层的SiCf/ti-6Al-4v的界面反应产物,从SiC... 详细信息

采用扫描电镜、透射电镜和X射线衍射仪研究了用中国制备SiC纤维增强的ti-6Al-4v复合材料的界面反应,发现在SiC纤维的C涂层和ti-6Al-4v基体之间形成的界面反应产物为细晶粒和粗晶粒的tiC,而无C涂层的SiCf/ti-6Al-4v的界面反应产物,从SiC纤维到ti-6Al-4v基体,依次为细晶粒的tiC+ti5Si3、粗晶粒的tiC和ti3SiC2。还测量了界面反应区厚度并讨论了界面反应机理。

关键词： SiC纤维 ti-6ai-4v 复合材料界面反应

Compound Ceramic Coatings on ti-6Al-4v by Micro-Plasma Oxidation in NaAlO_2 Solution

在线全文

学校读者我要写书评

暂无评论

材料热处理学报 2004年第05B期25卷 1060-1063页

作者： YAOZhong-ping JIANGZhao-hua XINShi-gang SUNXue-tong WUZhen-dong Dept.ofAppliedChemistry HarbinInstituteofTechnologyHarbin150001PRC

Micro-plasma oxidation (MPO) technique is a new technique by which compound ceramic coating can be grown in situ on Al, ti, Mg and many other valve-metals. Compound ceramic coatings on ti-6Al-4v alloy were prepared for different time by pulsed bi-polar MPO in NaAlO2 solution. The phase composition, morphology and the element distribution of the coatings were studied by XRD, SEM and JEOL SUPERPROBE 733 electric probe, respectively. Electrochemical Impedance Spectra (EIS) of the coatings were measured to study the structure character of the coatings. Through the proper EIS interpreting software, the "equivalent circuit" of the coatings was established, and the fitting values of equivalent element were calculated. The coating is mainly composed of Al2tiO5, a-A12O3 and rutile tiO2. The content of ti element in the coating is less than that of substrate; its distribution is relatively uniform, and ti in the outer layer is less than that in the inner layer. The content of Al in the coating is more than that of substrate, and its distribution is not even: Al in the middle part is more than that on both sides of the coating; And the EIS analysis has illustrated the double-layer structure of the coatings, and the outside layer is loosen and the inner layer compact; with the increase of the oxidizing time, the surface roughness of the coatings, and the porosity of the outer layer of the coating are increased while the compactness of the inner layer of the coatings are improved.

关键词：复合陶瓷涂层 ti-6ai-4v NaAlO2 钛合金微等离子氧化

Phase composition, morphology and element contents of micro-arc oxidation ceramic coatings on ti–6Al–4v alloy under different calcination conditions

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2016年第11期35卷 836-840页

作者： Guo-Dong Hao Xue-long Hao Zu-Fang Zhu Department of Chemistry Mudanjiang Normal University National Center of Analysis and Testing for Nonferrous Metals and Electronic Materials General Research Institute for Nonferrous Metals

Compound ceramic coatings with the main crystalline of Al_2tiO_5（in the as-prepared coating without treatment） were prepared in situ on the surface ti-6Al-4v alloy by means of pulsed bipolar micro-arc oxidation in Na AlO_2 solution. For the purpose of studying the antioxidation properties of the samples, the coated samples treated in argon and the as-coated samples were calcined in air at 1000 °C. And the related characteristics were investigated by X-ray diffraction（XRD）, scanning electron microscopy（SEM） and X-ray fluorescence（XRF） spectroscopy, respectively. The results show that, when it was calcined in air for 1 h, Al_2tiO_5in the as-prepared coating decomposed and transformed into α-Al_2O_3 and rutile tiO_***, after almost 4 h in argon, Al_2tiO_5in the asprepared coating decomposed and the final coating surface contents are completely α-Al_2O_3, and those of the middle interface are mainly Al_2O_3 and ti_2O_3. The morphologies of the coatings after calcination in argon and air are ***-temperature oxidation occurred violently in the alloy substrate without coatings. Furthermore, the weight gain curves of the as-prepared samples and the coated samples treated in argon both show a parabolic shape.

关键词： Micro-arc oxidation ti-6ai-4v Argon High-temperature oxidation

Influence of Sintering time on Mechanical Properties of ti-6Al-4v Compacts by Metal Injection Molding

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2005年第7期34卷 1123-1127页

作者： GuoShibo QuXuanhui DuanBohua QinMingli ZhangYang UniversityofScienceandTechnologyBeijing Beijing100083China

ti-6Al-4v compacts were fabricated by metal injection molding (MIM). Influence of vacuum sintering time on mechanical properties of the sintered compacts at 1260℃were investigated. The experimental results show that the compacts sintered at 1 260℃ for 3 hours～6 hours, which was made from hydrogenation-dehydrogenation(HDH) powder(averageparticles size is 45 μm), had a relative density of 95.6%～ 96.7%, ultimate tensile strength (648 MPa～686 MPa) and 0.2% yield strength (526 MPa～615 MPa) but a lower elongation (4%) and that the compacts sintered at 1 260℃ for 2 hours～6 hours, which was made from 90wt% gas-atomized powder(average particles size is 32.5 μm) and 10 wt% HDH powder, had higher relative density (>95%),ultimate tensile strength (800 MPa～848 MPa), 0.2% yield strength (712 MPa～762 MPa) and high elongation (7.4%～9.5%).The mechanical properties of mixed powder specimens were nearly equivalent to the ASTM for the PM compacts.

关键词： MIM ti-6ai-4v sintering time density tensile properties

tiN涂覆的 ti-6Al-4v注入Cu^(2+)后的抑菌性与细胞相容性研究

在线全文

学校读者我要写书评

暂无评论

中国生物医学工程学报 2019年第2期38卷 208-215页

作者：褚珊珊万荣欣吕晓飞顾汉卿彭诚天津医科大学第二医院天津300211 天津医科大学天津市泌尿外科研究所天津300211

在tiN涂覆的ti-6Al-4v表面分别注入一定剂量的Cu^(2+)或Ag^+,研究并对比所注入表面的抑菌性和细胞相容性。将L929细胞分别接种于4种材料上:空白对照组——ti-6Al-4v(钛合金组),阴性对照组——tiN涂覆的ti-6Al-4v(tiN组),阳性对照组——... 详细信息

在tiN涂覆的ti-6Al-4v表面分别注入一定剂量的Cu^(2+)或Ag^+,研究并对比所注入表面的抑菌性和细胞相容性。将L929细胞分别接种于4种材料上:空白对照组——ti-6Al-4v(钛合金组),阴性对照组——tiN涂覆的ti-6Al-4v(tiN组),阳性对照组——tiN涂覆的ti-6Al-4v表面注Ag(注Ag组),实验组——tiN涂覆的ti-6Al-4v表面注Cu(注Cu组)。通过激光共聚焦观察细胞的骨架形态,通过扫描电镜观察细胞铺展黏附,通过CCK-8检测细胞增殖。将金黄色葡萄球菌液滴到各组样品表面,24 h后通过活菌铺板计数法观察材料表面活菌的菌落数目,用激光共聚焦、扫描电镜观察细菌黏附、形态。接触角检测材料亲水性,XPS检测材料表面元素组成,ICP-MS检测材料目标元素离子析出量。激光共聚焦和扫描电镜:注Ag组和注Cu组细胞较为密集,黏附、铺展充分,可见板状伪足与丝状伪足。CCK-8:接种1、3、5天后,注Ag组和注Cu组细胞与钛合金组以及tiN组相比增殖明显,证明这两组材料没有明显毒性。活菌铺板计数:注Cu组和注Ag组菌落少,抑菌率分别为91%±2%和87%±2%。激光共聚焦和扫描电镜:注Cu组和注Ag组的细菌比钛合金组和tiN组的金黄色葡萄球菌黏附少。细胞壁完整性被破坏,部分细菌破碎。研究表明,tiN涂覆ti-6Al-4v表面注Cu和注Ag均具有较好的细胞相容性和抑菌性。

关键词： tiN涂覆 ti-6ai-4v MEvvA离子注入 Cu抑菌性细胞相容性

ti6A14v钛合金高速切削试验与有限元建模

在线全文

学校读者我要写书评

暂无评论

机械设计与研究 2012年第4期28卷 92-96,100页

作者：张相琴张雪萍 A.K.Srivastava 上海交通大学机械工程学院上海200240 美国TechSolve公司辛辛那提45237

综合考虑刀具圆角影响的Merchant模型和高速正交切削ti6ai 4v实验测量的切削力和切屑几何参数,解析求得了"切屑-刀具-工件"摩擦系数。计算表明"刀具-工件"摩擦系数约为"刀具-切屑"摩擦系数的3～7倍,该研究克服了现有文献中对"切屑-刀具... 详细信息

综合考虑刀具圆角影响的Merchant模型和高速正交切削ti6ai 4v实验测量的切削力和切屑几何参数,解析求得了"切屑-刀具-工件"摩擦系数。计算表明"刀具-工件"摩擦系数约为"刀具-切屑"摩擦系数的3～7倍,该研究克服了现有文献中对"切屑-刀具-工件"摩擦系数取值的盲目性。基于该摩擦关系,建立钛合金高速切削有限元模型(FEM)。仿真切削力与试验值相比误差小于4.9%:锯齿间距、锯齿高度,及其剪切角与试验值误差均小于5.2%,钛合金高速切削有限元模型得到了有效性验证。

关键词： ti-6ai-4v 高速干切削摩擦系数有限元分析