Microstructure Analysis of TC4/Al 6063/Al 7075 Explosive Welded Composite Plate via Multi-scale Simulation and Experiment  

TC4/Al 6063/Al 7075爆炸焊接复合板的微观结构分析:多尺度模拟与实验研究

作　　者：Zhou Jianan Luo Ning Liang Hanliang Chen Jinhua Liu Zhibing Zhou Xiaohong 周嘉楠;罗宁;梁汉良;陈金华;刘治兵;周晓红(中国矿业大学深地工程智能建造与健康运维全国重点实验室,江苏徐州221116;中煤科工集团淮北爆破技术研究院有限公司,安徽淮北235000)

机构地区：[1]National Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China [2]China Coal Technology Engineering Group Huaibei Blasting Technology Research Institute Limited Company,Huaibei 235000,China

出　　处：《稀有金属材料与工程》2025年第1期27-38,共12页Rare Metal Materials and Engineering

基　　金：Opening Foundation of Key Laboratory of Explosive Energy Utilization and Control,Anhui Province(BP20240104);Graduate Innovation Program of China University of Mining and Technology(2024WLJCRCZL049);Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX24_2701)。

摘　　要：Because of the challenge of compounding lightweight,high-strength Ti/Al alloys due to their considerable disparity in properties,Al 6063 as intermediate layer was proposed to fabricate TC4/Al 6063/Al 7075 three-layer composite plate by explosive welding.The microscopic properties of each bonding interface were elucidated through field emission scanning electron microscope and electron backscattered diffraction(EBSD).A methodology combining finite element method-smoothed particle hydrodynamics(FEM-SPH)and molecular dynamics(MD)was proposed for the analysis of the forming and evolution characteristics of explosive welding interfaces at multi-scale.The results demonstrate that the bonding interface morphologies of TC4/Al 6063 and Al 6063/Al 7075 exhibit a flat and wavy configuration,without discernible defects or cracks.The phenomenon of grain refinement is observed in the vicinity of the two bonding interfaces.Furthermore,the degree of plastic deformation of TC4 and Al 7075 is more pronounced than that of Al 6063 in the intermediate layer.The interface morphology characteristics obtained by FEM-SPH simulation exhibit a high degree of similarity to the experimental results.MD simulations reveal that the diffusion of interfacial elements predominantly occurs during the unloading phase,and the simulated thickness of interfacial diffusion aligns well with experimental outcomes.The introduction of intermediate layer in the explosive welding process can effectively produce high-quality titanium/aluminum alloy composite plates.Furthermore,this approach offers a multi-scale simulation strategy for the study of explosive welding bonding interfaces.轻质高强钛/铝合金由于材料属性差距悬殊导致复合困难。提出引入Al 6063中间层,通过爆炸焊接成功制备TC4/Al 6063/Al7075三层复合板。通过场发射扫描电子显微镜和电子背散射衍射揭示了各结合界面微观特性。应用有限元方法-光滑粒子流体动力学(FEM-SPH)方法与分子动力学(MD)方法相结合针对爆炸焊接结合界面多尺度下成形及演化特征进行分析。结果表明,TC4/Al 6063和Al 6063/Al 7075结合界面形貌平坦且存在小波纹,无明显缺陷和裂纹。两个结合界面附近均观察到晶粒细化现象,且TC4与Al 7075塑性变形程度均强于中间层Al 6063。FEM-SPH模拟得到的界面形貌特征与实验结果相近。MD模拟表明,界面元素扩散主要发生在卸载阶段,界面元素扩散厚度模拟结果与测试结果相符。采用引入中间层爆炸焊接工艺可以有效地制备高质量钛/铝合金复合板,并为爆炸焊接结合界面提供了一种多尺度模拟思路。

关 键 词：TC4/Al 6063/Al 7075 composite plate explosive welding microstructure analysis multi-scale simulation 

分 类 号：TG456.6[金属学及工艺—焊接]