钢/铝界面冶金结合泡沫铝夹芯板的制备及其冲击特性研究

本项申请采用液相混合制备可发泡预制坯、热压复合制备钢/预制坯/钢三明治式复合结构、红外线快速发泡制备钢/铝界面冶金结合的泡沫铝夹芯板，并围绕所制夹芯板的成形机制和抗冲击特性（爆炸、侵彻）展开研究。重点研究泡沫铝夹芯板制备过程中界面和泡沫组织的形成和演化规律、高应变冲击载荷下冲击波的破坏形式和能量衰减机理等基本科学问题。通过研究揭示钢/铝界面冶金结合泡沫铝夹芯板内部芯层泡沫组织的演变方式和钢/铝界面的结合机制，确定高应变载荷下钢/铝复合泡沫铝夹芯结构的抗冲击特性，理清具有冶金结合界面泡沫铝夹芯板的能量耗散机制和冲击波衰减行为与芯层泡沫结构、界面结合方式的相互关系，明确钢/铝界面冶金结合泡沫铝夹芯板的变形/失效模式和动态损伤过程，为制备界面结合强度高、结构均匀的钢/铝复合泡沫铝夹芯板提供理论依据和控制方法，为钢/铝界面冶金结合的轻质三明治结构材料在防护工程上的实际应用提供实验、理论和设计基础。

In this application, steel-Al foam sandwich panel (AFS) with metallic bonding will be prepared based on a hot-pressed three-layer composite with two steel facesheets and a precursor fabricated by liquidus mixing method as core, then foamed via infrared rapid foaming method. Researches were carried out in terms of the forming mechanisms and impact (blast and penetration) resistance of the AFS prepared. Emphasis is put on the analysis of some fundamental scientific issues such as forming/evolution laws of the interfaces and cell structure within the AFS, and the damage modes and energy attenuation mechanisms of the AFS under impacts..By researching the evolution of cell structure, bonding mechanism of steel-Al interface and the impact characteristics of the AFS, relationship between energy dissipation mechanism/stress wave attenuation behavior and cell structure/bonding patterns of the interfaces within the AFS will be determined, and the deformation process as well as damage modes of the steel-AFS subjected to impact (blast and penetration) can be revealed..This application aims to provide theoretical supports and suitable control approaches for the preparation of steel-AFS with reliable metallurgical bonding strength as well as uniform cell structure and to provide experimental, theoretical and design basis for the application of light-weight steel-Al foam sandwich structures with metallurgical bonding into protective works.