应变率及温度对复合材料TP-650力学性能的影响  

Effects of Strain Rate and Temperature on Mechanical Properties of TP-650 Composite

作　　者：李伟[1] 宋卫东[1] 宁建国[1] 毛小南[2] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]西北有色金属研究院,西安陕西710016

出　　处：《稀有金属材料与工程》2010年第7期1195-1198,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(10625208);国家重点基础研究发展规划(2010CB8327006)资助项目

摘　　要：分别利用MTS-810试验机、杆-杆型冲击拉伸试验机(SHTB)和Instron-1195高温电子拉伸机对复合材料TP-650进行了准静态、动态及高温拉伸试验分析,研究温度和应变率耦合作用对TiC颗粒增强钛基复合材料TP-650力学性能的影响。研究表明,复合材料TP-650的性能优势可保持到高温,650℃时仍具有良好的综合力学性能;室温时,复合材料TP-650具有比基体高的强度和低的韧性;应变率低于1000s-1时,复合材料TP-650呈现正的应变率敏感性。基于试验结果,利用双曲正弦形式修正的Arrhenius关系建立了TP-650的流变力学模型,给出了模型结果,与试验结果相吻合。Quasi-static,dynamic and high-temperature tension experiments for the composite TP-650 were carried out by MTS-810,bar-bar tensile impact apparatus （SHTB） and Instron-1195 machine,respectively. The coupling effects of temperature and strain rate on the mechanical properties of TiC particle reinforced titanium matrix composite TP-650 were investigated. The results show that the TP-650 composite has excellent mechanical properties at elevated temperatures,even at 650 oC. At room temperature,TP-650 composite has higher strength and lower toughness than the matrix. TP-650 composite shows positive strain rate sensitivity below the strain rate of 1000 s-1. Based on the experiment results,the rheological mechanics model of TP-650 composite was established with Arrhenius equation in the form of hyperbolic sine function,and the model prediction agreed with the experimental results.

关 键 词：钛基复合材料 力学性能 应变率 高温 动态拉伸 

分 类 号：TB33[一般工业技术—材料科学与工程]