Campana Francesca, Mancini Edoardo, Pilone Daniela, Sasso Marco
DIMA, Sapienza Università di Roma, via Eudossiana 18, 00184 Roma, Italy.
DIIIE, Università degli studi dell'Aquila, Piazzale Ernesto Pontieri, Monteluco di Roio, 67100 L'Aquila, Italy.
Materials (Basel). 2021 Mar 11;14(6):1349. doi: 10.3390/ma14061349.
The interesting properties of Al 6061 aluminum foams have boosted the research on the correlation between foam composition and morphology and its mechanical response under dynamic conditions. In this study, ingots of an Al 6061-T4 foam were sectioned and analyzed in order to determine their microstructural and morphological characteristics, and then quasi-static and dynamic tests (10 to 3 × 10 s) were carried out to determine the material mechanical behavior. Dynamic tests, carried out by using the split Hopkinson bar, highlighted that the studied foam is characterized by a very good energy absorption capability, due to its ductile behavior. Nevertheless, the conducted research showed that cell morphology and distribution affect its mechanical behavior in dynamic conditions in which localized cell collapse may result in a decreased energy absorption and efficiency of the foam.
6061铝泡沫材料的有趣特性推动了对泡沫成分与形态之间的相关性及其在动态条件下的力学响应的研究。在本研究中，对6061-T4泡沫铸锭进行切片和分析，以确定其微观结构和形态特征，然后进行准静态和动态测试（10至3×10秒）以确定材料的力学行为。使用分离式霍普金森杆进行的动态测试表明，由于其韧性行为，所研究的泡沫具有非常好的能量吸收能力。然而，所进行的研究表明，泡孔形态和分布会影响其在动态条件下的力学行为，在这种条件下，局部泡孔坍塌可能会导致泡沫的能量吸收和效率降低。
