TA2/1060/5083数值模拟及试验

TA2/1060/5083 Explosive Welding Numerical Simulation and Experiment

摘要:

TA2与5083爆炸焊接界面易生成脆性金属间化合物、氧化物、连续熔化区等缺陷，焊接窗口狭窄，最佳焊接参数难以准确获得。本文重构了动态弯折角β和碰撞速度Vf的β-Vf模型，使用SPH-FEM耦合算法，首次运用Steinberg-Guinan材料本构模型进行了炸药厚度为10mm、15mm、20mm，复板厚度为1.5mm的TA2/1060/5083爆炸焊接数值模拟；并采用数值模拟获得的参数开展了爆炸焊接试验。数值模拟和试验结果高度吻合并一致表明：药厚10mm时，TA2/1060和1060/5083界面均呈优质平直状结合，药厚15mm时，1060/5083界面呈波状形貌结合，两种药厚条件下的钛-铝过渡界面均未检测到脆性金属间化合物缺陷生成；药厚20mm时，基复板材料发生破坏，不能实现复合。运用计算优化的参数成功制备了大面积TA2/1060/5083复合材料，本文为理化性能差异较大异种金属等爆炸复合问题提供了一种新的可靠算法。

Abstract:

The explosive welding interface between TA2 and 5083 is prone to produce brittle intermetallic compounds, oxides, continuous melting zone and other defects, the welding window is narrow, and the optimal welding parameters are difficult to obtain accurately.In this paper, the β-Vf model of dynamic bending Angle β and impact velocity Vf is reconstructed. The numerical simulation of TA2/1060/5083 explosive welding with explosive thickness of 10mm, 15mm and 20mm and flyer plate thickness of 1.5mm are carried out for the first time by using the Steinberg-Guinan material constitutive model using SPH and Lagrange coupling algorithm. The parameters obtained from numerical simulation were used to carry out explosive welding experiments.The numerical simulation and experimental results show that TA2/1060 and 1060/5083 interface have high quality straight bond when the explosive thickness is 10mm, and 1060/5083 interface has wavy shape bond when the explosive thickness is 15mm. No brittle intermetallic defect formation is detected at the Ti-Al transition interface under the two explosive thickness conditions;When the thickness of explosive is 20mm, the material is damaged and can not be recombined.In this paper, a large area TA2/1060/5083 composite material has been successfully prepared, and the explosive welding process has been accurately calculated, which provides a reliable algorithm for the dissimilar metal explosive composite problem with great difference in physical and chemical properties.