TA2/AZ31B/2024Al爆炸焊接复合板界面微观结构特征及其动态力学性能  

Interfacial microstructure characteristics and dynamic mechanical properties of TA2/AZ31B/2024Al explosively-welded composite plates

作　　者：梁汉良 罗宁[1,2] 陈彦龙 芮天安[3] 潘玉龙 LIANG Hanliang;LUO Ning;CHEN Yanlong;RUI Tianan;PAN Yulong(State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China;Anhui Baotai Special Materials Co.,Ltd.,Xuancheng 242500,Anhui,China)

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [2]中国矿业大学力学与土木工程学院,江苏徐州221116 [3]安徽宝泰特种材料有限公司,安徽宣城242500

出　　处：《爆炸与冲击》2024年第4期139-156,共18页Explosion and Shock Waves

基　　金：国家自然科学基金(12072363,12372373);爆破工程湖北省重点实验室开放基金(BL2021-03)。

摘　　要：运用平行法爆炸焊接工艺,开展了TA2/AZ31B/2024Al多层轻质金属板材爆炸焊接实验。通过扫描电镜、电子背散射衍射、分离式霍普金森压杆及三维轮廓扫描等测试技术,对多层爆炸焊接复合板界面微观结构特征、材料物相变化规律、复合板材动态力学性能及材料冲击断口特征开展了系统研究。研究结果表明:焊后多层轻质金属复合板的4个焊接界面均呈现出爆炸焊接特有的波形结构特征,结合界面处无明显缺陷,总体焊接质量良好。结合界面处晶粒发生细化并形成细晶区,1060Al过渡层内晶粒组织由于强塑性变形呈现典型的拉长层状晶粒特征,4个结合界面处均出现明显的变形织构与再结晶织构特征。沿X方向的试样最大动态抗压强度达605 MPa,分层断口界面三维形貌呈现近似水面波纹的独特结构特征。沿Z方向的试样最大动态抗压强度达390 MPa,断口界面三维形貌呈现明显的纤维状韧性断裂特征。In recent years,with the rapid development of technology and equipment in the fields of aerospace,defense,and military industries,multilayer lightweight metal composite materials have attracted widespread attention to face complex service environments and reduce equipment weight.Titanium,aluminum,magnesium,and other lightweight metals and their alloys have advantages such as high specific strength,high specific elastic modulus,high damping and shock absorption,high electrostatic shielding,and high machinability,making them the most promising lightweight metal materials for application.In this study,the explosive welding experiments of TA2/AZ31B/2024Al multilayer light metal plate were carried out using a parallel explosive-welding process.Using scanning electron microscopy,electron backscatter diffraction,split Hopkinson pressure bar,and three-dimensional contour scanning,the interfacial microstructure characteristics,material phase changes,dynamic mechanical properties,and impact fracture characteristics of multilayer explosive welded composite plates were studied systematically.The results indicate that the four joining interfaces of the multilayer lightweight metal composite plate after welding present unique waveform structure characteristics of explosive welding,and there are no obvious defects at the joining interfaces.The overall welding quality is good.The grain refinement occurs at the joining interfaces and forms the fine grain region.The grain structure in the 1060Al transition layer exhibits typical elongated layered grain characteristics due to strong plastic deformation,and deformation texture and recrystallization texture characteristics appear at all four joining interfaces.The maximum dynamic compressive strength of the sample along the X-direction is 605 MPa,and the three-dimensional morphology of the fracture interface presents unique structural features similar to the water ripples.The maximum dynamic compressive strength of the sample along the Z-direction is 390 MPa,and the three-dimensional

关 键 词：轻质金属 多层复合板 爆炸焊接 界面微观结构 动态力学性能 

分 类 号：O382[理学—流体力学] TG456.6[理学—力学]