W/Ti层状复合材料的弯曲断裂行为及其有限元模拟  

The Bending Fracture Behaviors of W/Ti Multilayer Composites and Their Finite Element Model

作　　者：陈寅 杨圣尧 李宽路 谢梦雨 王珊 陈畅[1,2] CHEN Yin;YANG Shengyao;LI Kuanlu;XIE MengYu;WANG Shan;CHEN Chang(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,Anhui,China;Intelligent Manufacturing Institute of HFUT,Hefei University of Technology,Hefei 230051,Anhui,China;Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment,Hefei University of Technology,Hefei 230009,Anhui,China;Institute of Industry and Equipment Technology,Hefei University of Technology,Hefei 230009,Anhui,China)

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]合肥工业大学智能制造技术研究院,安徽合肥230051 [3]航空结构件成形制造与装备安徽省重点实验室,安徽合肥230009 [4]合肥工业大学工业与装备技术研究院,安徽合肥230009

出　　处：《中国钨业》2021年第5期57-64,共8页China Tungsten Industry

基　　金：安徽省重点研究与开发计划项目(202104b11020023)。

摘　　要：层状增韧复合材料是提高钨材料韧性的有效方法之一。利用放电等离子体烧结装置在不同温度下连接制备了W/Ti层状复合材料,分析了该复合材料的组织、三点弯曲力学性能和断裂机制,并对其三点弯曲断裂过程进行了有限元模拟。结果表明,Ti韧化层可以有效提高钨材料的韧性,W/Ti层状复合材料的三点弯曲曲线上显示了明显的“伪塑性”。W/Ti层状复合材料受到弯曲载荷作用后,主要的断裂行为有W层中隧道裂纹的形成、Ti层的塑性变形及剪切断裂、W/Ti界面裂纹的扩展及偏转。同时,有限元模拟结果很好地证实了W/Ti层状复合材料的断裂过程。Layered toughening composites are one of the effective methods to improve the toughness of tungsten materials. The W/Ti layered composites are prepared by spark plasma sintering at different temperatures. The microstructure,three-point bending mechanical properties and the fracture mechanism of the composites were analyzed, and the fracture process of three-point bending was simulated by finite element model. Results obtained show that Ti toughening layer can effectively improve the toughness of tungsten materials, and the three-point bending behaviors of W/Ti layered composites show pseudo-ductile bending behavior. After the W/Ti layered composite was subjected to bending load, the main fracture behaviors include the formation of tunnel cracks in the W layer, the plastic deformation and the shear fracture of the Ti layer, and the propagation and deflection of the W/Ti interface cracks. Meanwhile, the results of the finite element model which showed the fracture progress of the W/Ti layered composites were highly consistent with experimental results of three-point bending tests.

关 键 词：钨层状复合材料 微观组织 断裂机制 有限元模拟 

分 类 号：TB331[一般工业技术—材料科学与工程] TG111.91[金属学及工艺—物理冶金]