原位生成界面的第一性原理-内聚力建模  

First principle-cohesive zone modeling of in-situ interface

作　　者：邱辉[1] 张方圆 李国平[1] 林峙安 周鑫予 李锦棒 肖华海 金永生 QIU Hui;ZHANG Fangyuan;LI Guoping;LIN Zhian;ZHOU Xinyu;LI Jinbang;XIAO Huahai;JIN Yongsheng(School of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,China;Ningbo Silver-ball Technology Co.Ltd.,Ningbo 315200,China)

机构地区：[1]宁波大学机械工程与力学学院,浙江宁波315211 [2]宁波银球科技股份有限公司,浙江宁波315200

出　　处：《兵器材料科学与工程》2023年第1期94-100,共7页Ordnance Material Science and Engineering

基　　金：宁波市自然科学基金资助项目(2021J086);科技创新2025重大专项(宁波市重大科技任务攻关项目)(2022Z050);健康智慧厨房浙江省工程研究中心。

摘　　要：激光熔覆技术制造(TiBw+TiCp)/Ti复合材料时颗粒与基体间为原位生成界面,为探究原位生成界面力学性能,用第一性原理和内聚力模型计算具体的界面结合强度。用Abaqus建立压缩模型,导入计算出的界面结合强度,分析其颗粒形貌的变化,并对不同应变率下的压缩试验进行验证。结果表明:位于剪切带上的TiB颗粒断裂,TiC颗粒尺寸较小且为球形,无显著变化。In the laser cladding(TiBw+TiCp)/Ti composite,the interface between particles and matrix was generated in situ.To explore the interface mechanical properties generated in situ,the first principles and cohesion model were used to calculate the specific interface bonding strength.Abaqus was used to establish the compression model,imported the calculated interfacial bond strength,analyzed the change of particle morphology,and verifiedy it with compression experiments at different strain rates.The results show that the TiB particles located in the shear zone fracture,while the TiC particles do not change significantly due to their small size and spherical shape.

关 键 词：激光熔覆 (TiBw+TiCp)/Ti复合材料 第一性原理 内聚力模型 力学性能 

分 类 号：TG146[一般工业技术—材料科学与工程]