论文标题
位错网络的体积
Volume of a dislocation network
论文作者
论文摘要
我们得出了一个简单的分析线积分表达式，用于任意互连位错网络的松弛体积张量。该数量确定了错位对材料的尺寸变化和体积肿胀的贡献的大小，并突出了位错的基本双重作用，作为内部应变的来源以及塑性变形的载体。为了说明该方法的应用，我们计算了四面体的堆叠断层的松弛体积，这是FCC金属中通常发生的缺陷。 BCC金属中（A/2）<111>>和A <001>脱位形成的异常四面体构型的体积；并估计扩展位错的相对贡献对大量辐照的钨的体积松弛。
We derive a simple analytical line integral expression for the relaxation volume tensor of an arbitrary interconnected dislocation network. This quantity determines the magnitude of dislocation contribution to the dimensional changes and volumetric swelling of a material, and highlights the fundamental dual role of dislocations as sources of internal strain as well as carriers of plastic deformation. To illustrate applications of the method, we compute the relaxation volume of a stacking fault tetrahedron, a defect commonly occurring in fcc metals; the volume of an unusual tetrahedral configuration formed by the (a/2)<111> and a<001> dislocations in a bcc metal; and estimate the relative contribution of extended dislocations to the volume relaxation of heavily irradiated tungsten.
