In this paper, the dynamic deformation behaviors of 2 aluminum alloys (AA6016, AA5182) and 2 steels (v 1158, FeP04) are investigated. Firstly, the test method, an improved Hopkinson pressure bar test, is introduced. Then, the test results are presented and analyzed. The strain rate range used in this study is between 290 s^(-1) and 1750 s^(-1).The test results show that the yield stresses of all four tested materials increase along with the increase of strain rate, but the ductility does not. An interesting finding is that the tested Al alloys demonstrated larger elongation than those of steels. In conventional tensile tests, as it is well known, the tensile elongation of low carbon steels is usually much higher than the one of Al alloys. So, it can be predicted that the aluminum alloys could have better formability than the steels in high speed forming processes, though the underlying mechanism is not fully understood.
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机译：本文研究了2种铝合金（AA6016，AA5182）和2种钢（v 1158，FePO4）的动态变形行为。首先，介绍了一种改进的霍普金森压力棒试验方法。然后，给出并分析测试结果。本研究使用的应变率范围在290 s ^（-1）至1750 s ^（-1）之间。测试结果表明，四种材料的屈服应力均随应变率的增加而增加，但延展性没有。一个有趣的发现是，经过测试的铝合金比钢具有更大的延伸率。众所周知，在常规的拉伸试验中，低碳钢的拉伸伸长率通常比铝合金中的一种高得多。因此，可以预见，尽管尚未完全理解其基本机理，但铝合金在高速成型工艺中可能具有比钢更好的可成型性。
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