Smooth Spalls and the Polymorphism of Iron
Smooth Spalls and the Polymorphism of Iron
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光滑剥落和铁的多态性
DOI：
10.1063/1.1736137
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发表时间：
1961
期刊：
影响因子：
--
通讯作者：
J. Erkman
中科院分区：
文献类型：
--
作者：
J. Erkman
当Armco铁被加载一个压力超过0.131兆巴的瞬变波时，可以观察到光滑的层裂。由铁传递的两个截然不同的压缩激波之后是一个陡峭的稀薄激波，这可以被称为稀薄激波。在自由面上，第一次压缩激波被反射为向后的稀疏波。该波也可能陡化为稀薄激波，最终与前向稀薄激波相遇。这些波的相互作用会产生破坏性的局部张力，从而产生平滑的骨折。应用流体力学理论计算了这种相互作用平面的位置。这些计算是不准确的，因为浮雕波的声速是从Hugoniot数据中获得的，因为没有其他数据可用。实验结果与计算结果吻合较好。这项工作表明，在双重层裂的情况下，离原始自由层裂最远的断裂…
When Armco iron is loaded with a transient wave in which the pressure exceeds 0.131 megabar, smooth spalls may be observed. The two distinct compression shocks which are transmitted by the iron are followed by a steep rarefaction which may be called a rarefaction shock. At a free surface, the first compression shock is reflected as a backward‐facing rarefaction wave. This wave may also steepen into a rarefaction shock which eventually meets the forward‐facing rarefaction shock. The interaction of these waves results in a localized tension of destructive magnitude, which produces a smooth fracture. Location of the plane of this interaction was calculated by applying the theory of hydrodynamics. These calculations are inexact because the speed of sound for relief waves was taken from Hugoniot data since other data are not available. Fair agreement was obtained between experimental and calculated results. The work indicates that, in the case of a double spall, the fracture most remote from the original free ...