A TA1 (Ti alloy)/low alloy steel (LAS) composite plate was manufactured by explosive welding. The effects of the bonding interface microstructure on the mechanical properties and fracture behavior of the composite plate were investigated. The results show that the interface has a wavy structure with intermetallic compounds (IMCs) enclosed by a steel matrix. The metallurgical bonding interface was achieved by local diffusion, with a several micrometer-thick diffusion layer. Two kinds of microcracks were formed in the IMC region and the diffusion interface. Microcracks in the IMC region propagate with difficulty due to the impediment of the IMC/steel interface. The microcracks initiated at the interface need to propagate into the fine-grain steel matrix before crack connection and delamination. The shear strength of the TA1/LAS composite plate was over 350 MPa. The composite plate could be bent up to the equipment limit (135 degrees). Excellent mechanical properties were obtained since the crack propagation was hindered by the refined or elongated steel grains induced during explosive welding.

中文翻译：

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爆炸焊接TA1-低合金钢复合板的组织和力学性能

通过爆炸焊接制造TA1（钛合金）/低合金钢（LAS）复合板。研究了键合界面微观结构对复合板力学性能和断裂行为的影响。结果表明，该界面具有波浪状结构，金属间化合物（IMC）被钢基质包围。通过局部扩散和几微米厚的扩散层实现了冶金结合界面。在IMC区域和扩散界面中形成了两种微裂纹。由于IMC /钢界面的阻碍，IMC区域中的微裂纹难以传播。在裂纹连接和分层之前，在界面处引发的微裂纹需要传播到细晶粒钢基体中。TA1 / LAS复合板的剪切强度超过350 MPa。复合板可以弯曲到设备极限（135度）。由于裂纹扩展受到爆炸焊接过程中产生的细化或细长钢晶粒的阻碍，因此获得了优异的机械性能。