纳米TiC颗粒增强铝基复合材料的力学行为模拟  

Mechanical Behavior Simulation of Nano-TiC Particle Reinforced Aluminum Matrix Composites

作　　者：雷书宾 马志军[2] 郭永春[2] 李建平[2] 姚婷珍[1] LEI Shubin;MA Zhijun;GUO Yongchun;LI Jianping;YAO Tingzhen(School of Materials Science and Engineering,Xi'an Shiyou University,Xi'an 710065,China;School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an 710021,China)

机构地区：[1]西安石油大学材料科学与工程学院,陕西西安710065 [2]西安工业大学材料与化工学院,陕西西安710021

出　　处：《热加工工艺》2019年第16期80-83,88,共5页Hot Working Technology

基　　金：陕西省重点研发计划项目(2018ZDXM-GY-137);陕西省教育厅服务地方专项计划项目(18JC013)

摘　　要：为了研究纳米陶瓷颗粒对金属材料力学行为的影响,首先建立了TiC/Al复合材料的三维微观模型,采用有限元法与拉伸试验探究了复合材料受载时的应力应变分布规律与屈服强度,其中,有限元过程考虑了纳米TiC颗粒对铝合金基体的细晶强化,以及颗粒尺寸(500nm和200nm)、含量(1wt%、3wt%和5wt%)对复合材料的影响。结果表明:纳米TiC颗粒对复合材料的屈服强度起到了力学强化作用,小尺寸(200nm)的TiC颗粒力学强化效果较大;复合材料的屈服强度随着纳米TiC含量的增高而提升,但较高含量的TiC会损害基体的塑性。由于把颗粒的细晶强化贡献纳入了计算模型,颗粒尺寸为500nm、含量为1wt%与3wt%时TiC/Al复合材料屈服强度的预测值与试验值较为吻合。In order to study the effect of nano-ceramic particles on the mechanical behavior of metal materials,a three-dimensional micro-model of TiC/Al composites was established.The stress-strain distribution and yield strength of composites under load were investigated by finite element method and tensile test.In the finite element process,the fine grain strengthening of aluminum alloy matrix by nano-TiC particles and the effects of particle size (500 nm and 200 nm),content (1wt%,3wt% and 5wt%) on the composites were considered.The results show that,nano-TiC particles play a mechanical strengthening role in the yield strength of the composites,and the mechanical strengthening effect of TiC particles with small size (200 nm) is greater.The yield strength of the composites increases with the increase of the content of nano-TiC,but the plasticity of the matrix is damaged by the high content of TiC.The grain size of 500 nm and the particles content of 1wt% and 3wt%were calculated in the model.The predicted yield strength of the TiC/Al composite is in good agreement with the experimental value when the particle size is 500 nm and the content of the particles is 1 wt% and 3 wt%.

关 键 词：纳米TIC 颗粒增强铝基复合材料 模拟 

分 类 号：TB333.13[一般工业技术—材料科学与工程]