Study on the Interfacial Morphology and Mechanical Properties of Titanium-Aluminum Explosively Welded Composite Plates after Heat Treatment
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摘要:本研究采用爆炸焊接和热处理工艺制备了TA1/1060/TA1/1060/TA1 5层钛铝叠层复合板，运用SEM（扫描电镜）、EDS（能量色散谱仪）等测试技术分析了界面形貌与元素分布，并开展了力学性能实验。研究表明：爆炸焊接形成波形结构界面，热处理后生成大量金属间化合物TiAl3，界面结构得到优化；未热处理时钛铝复合板抗拉强度达到340 MPa，较理论值高出71.7%，热处理后抗拉强度虽降至114 MPa，但延展性显著提升；热处理后抗压强度从601.5 MPa提高至688.5 MPa，提升14.5%。研究证实热处理可优化钛铝复合板界面结合状态，通过TiAl3相的形成改善了材料的压缩性能与塑性变形能力。
Abstract:This study fabricated a five-layer TA1/1060/TA1/1060/TA1 titanium/aluminum laminated composite via explosive welding and heat treatment processes. The interfacial morphology and elemental distribution were characterized using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), and mechanical property tests were conducted. Results indicate that the explosive welding creates a wavy interfacial structure, a large number of intermetallic compounds TiAl3 are generated after heat treatment, optimizing the interface configuration; The as-welded composite plate has a tensile strength of 340 MPa, 71.7% higher than the theoretical value, while heat treatment decreases the tensile strength to 114 MPa, it significantly enhances the ductility; The compressive strength is also increased by14.5%, from 601.5 MPa to 688.5 MPa . The study shows that heat treatment effectively optimizes interfacial bonding in Ti/Al composite plates, through TiAl3 phase formation, simultaneously improving both compressive performance and plastic deformation capacity.
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