W颗粒/Zr_(41.2)Ti_(13.8)Cu_(12.5)Ni_(10)Be_(22.5)基非晶复合材料过冷液相区的塑性变形行为研究  

Plastic flow behavior of W particles/Zr_(41.2)Ti_(13.8)Cu_(12.5)Ni_(10)Be_(22.5) metallic glass matrix composite in supercooled liquid region

作　　者：苏小红 胡会娥[1] 孔小东[1] SU Xiao-hong;HU Hui-e;KONG Xiao-dong(Dept.of Basic Courses,Naval Univ.of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学基础部,武汉430033

出　　处：《海军工程大学学报》2021年第1期14-18,23,共6页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(51575522)。

摘　　要：为研究W颗粒/Zr_(41.2)Ti_(13.8)Cu_(12.5)Ni_(10)Be_(22.5)基非晶复合材料在过冷液相区的塑性变形行为,利用同步热分析试验、单轴压缩试验分析了温度和应变速率对该非晶复合材料塑性变形行为的具体影响,并采用X射线衍射(XRD)、显微硬度测试研究了塑性变形对该非晶复合材料结构和性能的影响。结果表明:该非晶复合材料在过冷液相区具有较好的塑性变形能力,随着温度的升高和应变速率的减小,其塑性流变应力不断减小,并逐渐呈现出均匀流变的特征;在温度为693 K、应变速率为1×10^(-3) s^(-1)时,非晶复合材料流变应力为190 MPa,为该材料在过冷液相区的最佳成形条件;该非晶复合材料在变形后并未发生明显的晶化,由于自由体积减少,其显微硬度从512.2 HV增加到546.9 HV。The plastic deformation behavior for W particles/Zr_(41.2)Ti_(13.8)Cu_(12.5)Ni_(10)Be_(22.5) metallic glass matrix composite in supercooled liquid region was studied.The influence of temperature and strain rate on plastic rheological behavior of the metallic glass matrix composite was analyzed by simultaneous thermal analysis test and uniaxial compression test,and the influence of the plastic deformation on structure and properties of the metallic glass matrix composite was evaluated by X-ray diffraction(XRD)and hardness test.The results showed that:the metallic glass matrix composite has good plastic deformation ability in the supercooled liquid region,and the flow stress decreases with increasing temperature and decreasing strain rate,which shows the characteristics of uniform flowing deformation.At a temperature of 693 K and a strain rate of 1×10^(-3) s^(-1),the flow stress of the metallic glass matrix composite is 190 MPa,which can be used as the best forming condition for the composite in the supercooled liquid region.There is no obvious crystal in the deformed composite,and the micro-hardness of the composite increases from 512.2 HV to 546.9 HV because of the decreasing internal free volume after deformation.

关 键 词：非晶复合材料 过冷液相区 塑性变形行为 单轴压缩试验 

分 类 号：TG139.8[一般工业技术—材料科学与工程]