共查询到19条相似文献,搜索用时 78 毫秒
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王桂松%张杰%耿林%王德尊%姚忠凯 《宇航材料工艺》2001,31(2):13-18
介绍了近几年国内外金属基复合材料(MMCs)高速超塑性的研究现状,包括拉伸超塑性、压缩超塑性。综述了各种基体和增强体复合材料的制备方法、获得高速超塑性的条件及高速超塑变形的特点。对于高速超塑性的变形机制,尤其是颗粒增强金属基复合材料的拉伸超塑变形机制进行了详细阐述。最后提出了MMCs高速超塑性存在的问题和今后研究的重点。 相似文献
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为满足航天产品的需要,前苏联主要研究并应用了B/A1,同时开展了C/A1研究,但 C/A1现在才开始进入工业试生产。1 B/A1 的应用情况和制造工艺 在莫斯科中央材料研究院见到了由 B/A1 管材组合焊接而成的卫星支架,它是由 相似文献
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复合材料与90年代战斗机 总被引:1,自引:0,他引:1
近十几年来。复合材料在飞机上的应用日益增多。本文以90年代战斗机上复合材料的应用为例,介绍了国外航空复合材料的发展水平以及可借鉴的经验。 相似文献
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介绍了碳纳米管的结构、性能等特点,综述了碳纳米管在金属基复合材料、聚合物基复合材料和陶瓷基复合材料中的应用研究情况,并对今后碳纳米管复合材料的发展趋势进行了展望。 相似文献
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本文介绍了复合材料在国外宇航工业申的应用,举例说明复合材料在战略导弹和运载火箭结构上的应用与发展情况。 相似文献
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In situ formed TiB2 particle reinforced aluminum matrix composites (TiB2/Al MMCs) have some extraordinary properties which make them be a promising material for high performance aero-engine blade. Due to the influence of TiB2 particles, the machinability is still a problem which restricts the application of TiB2/Al MMCs. In order to meet the industrial requirements, the influence of TiB2 particles on the machinability of TiB2/Al MMCs was investigated experimentally. Moreover, the optimal machining conditions for this kind of MMCs were investigated in this study. The major conclusions are: (1) the machining force of TiB2/Al MMCs is bigger than that of non-reinforced alloy and mainly controlled by feed rate; (2) the residual stress of TiB2/Al MMCs is compressive while that of non-reinforced alloy is nearly neutral; (3) the surface roughness of TiB2/Al MMCs is smaller than that of non-reinforced alloy under the same cutting speed, but reverse result was observed when the feed rate increased; (4) a multi-objective optimization model for surface roughness and material removal rate (MRR) was established, and a set of optimal parameter combinations of the machining was obtained. The results show a great difference from SiC particle reinforced MMCs and provide a useful guide for a better control of machining process of this material. 相似文献
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金属基复合材料界面特征与力学性能 总被引:5,自引:0,他引:5
金属基复合材料的界面特征在很大程度上决定这种材料的性能。本文分析了金属基复合材料界面的特性,阐述了界面特性与力学性能之间的内在规律,利用二组元模型解释了界面上服性化合物厚度与力学。性能之间的数学联系。 相似文献
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喷射共沉积技术在颗粒增强金属基复合材料中的应用 总被引:2,自引:0,他引:2
简要介绍了喷射共沉积技术的原理及特点,并以铝合金为例,综述了该工艺在颗粒增强金属基复合材料制备及性能改善中的应用。 相似文献
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研究了喷射沉积10Vol%SiCp/LY12复合材料的组织、强度极限该复合材料经热等静压和等温热正挤压后的超塑性。结果表明:喷射沉积的铝基复合材料经过简单的预处理具有良好的超塑性性能,应变速率敏感性指数m值达0.53,极限延伸率达345%。这与良好的组织状态密切相关。在该复合材料的超塑性变表过程中,空洞的形核与长大一直存在,空洞的长大和连接对材料的断裂有重要的影响。 相似文献
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SiCp/Al复合材料界面控制与评价新方法 总被引:9,自引:0,他引:9
尝试了一种控制 Si Cp/Al复合材料界面状态与性能的新途径 ,并首次应用声发射检测技术及其信号的小波分析新方法对控制效果进行了系统地评价。结果表明 :界面控制新方法的采用 ,使 Si Cp/Al复合材料损伤、断裂过程中的 Si C颗粒拔出模式发生了转变 ,进而显著提高了材料的整体力学性能 ;小波分析特别适合于提取此类复合材料断裂所致声发射信号的深层特征 ,并可望成为反映颗粒增强金属基复合材料界面区力学行为、评价其界面性能的有效手段 相似文献
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This article presents a micro-macro unified model for predicting the deformation of metal matrix composites (MMCs). A macro-scale model is developed to obtain the proper boundary conditions for the micro-scale model, which is used to assess the microstructural deformation of materials. The usage of the submodel technique in the analysis makes it possible to shed light on the stress and strain field at the microlevel. This is helpful to investigate the linkage between the microscopic and the macroscopic flow behavior of the composites. An iterative procedure is also proposed to find out the optimum parameters. The results show that the convergence can be attained after three iterations in computation. In order to demonstrate the reliability of micro-macro unified model, results based on the continuum composite model are also investigated using the stress-strain relation of composite obtained from the iterations. By comparing the proposed unified model to the continuum composite model, it is clear that the former exhibits large plastic deformation in the case of little macroscopic deformation, and the stresses and strains obtained from the submodel are higher than those from the macroscopic deformation. 相似文献