Steel–steel composite metal foam‐core sandwich panels (S‐S CMF‐CSP) with variety of thicknesses of components (face sheets and cores) are manufactured by attaching stainless steel face sheets to a S‐S CMF core using either solid‐state diffusion bonding or adhesion bonding. Scanning electron microscope imaging is used to evaluate the microstructure of diffusion bonded panels particularly at the interface of the core and face sheets. The puncture resistance of the sandwich panels is evaluated using a 0.50 caliber Mann gun barrel, modified to fire 2.54 and 3.175 cm diameter steel balls creating kinetic puncture energies up to 14 500 J. But, no complete penetrations through any of the sandwich panels are achieved. At lower impact velocities, tensile stresses resulted from the sudden changes in mechanical impedance between various layers of the sandwich panel recoil the ball back while at higher impact velocities, the high strain rate deformation at the point of impact along with the friction heat between the ball and panel surface fuses the ball to the target instantly resulting in debonding of adhesively bonded panels, whereas the diffusion bonded panels resist better. Sandwich panels with higher areal densities and thicker face sheets did not show major advantages over the panels with thinner face sheets.

中文翻译：

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复合金属泡沫芯夹芯板的耐穿刺性研究

具有不同厚度的组件（面板和内芯）的钢-钢复合金属泡沫芯夹芯板（S-S CMF-CSP）是通过使用两种固态材料将不锈钢面板附着到S-S CMF芯上来制造的扩散结合或粘合结合。扫描电子显微镜成像用于评估扩散粘结板的微观结构，尤其是在芯板和面板的界面处。使用0.50口径的Mann枪管评估了夹层板的耐穿刺性，该枪管经过改进，可发射直径2.54和3.175厘米的钢球，产生高达14 500 J的动穿刺能。但是，无法完全穿透任何夹层板。在较低的撞击速度下 拉力应力是由夹心板各层之间的机械阻抗的突然变化引起的，从而使球后退，而在较高的撞击速度下，撞击点处的高应变率变形以及球与嵌板表面之间的摩擦热将球熔化。球会立即击中目标，从而导致粘合板脱粘，而扩散粘合板的抵抗力更好。与具有较薄面板的面板相比，具有较高面密度和较厚面板的夹芯板没有显示出主要优点。而扩散粘结的面板具有更好的抵抗力。与具有较薄面板的面板相比，具有较高面密度和较厚面板的夹芯板没有显示出主要优点。而扩散粘结的面板具有更好的抵抗力。与具有较薄面板的面板相比，具有较高面密度和较厚面板的夹芯板没有显示出主要优点。