Abstract

The possibility of the structural turbulence of plastic flow and ductile fracture in low-carbon and low-alloy steel 09Mn2Si is shown by fracture toughness measurements and uniaxial tension of chevron-notched specimens at 20°C. The conditions for the structural turbulence of plastic deformation of solids are determined which provide high fracture toughness. The decisive functional role is played by the lattice curvature, the appearance of mesoscopic structural states in the lattice interstices at the nanoscale, the activation of self-consistent rotational motion in the hierarchy of mesoscopic structural levels, the presence of free volume, and the possibility of structural transformations at the nanoscale. A nonlinear theory of describing structural turbulence in a deformable solid is discussed.

中文翻译：

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晶格曲率条件下低合金钢塑性流动和韧性断裂的结构湍流

摘要

通过在20°C下的人字形缺口样品的断裂韧性测量值和单轴张力，可以看出低碳低合金钢09Mn2Si中塑性流动和塑性断裂的结构紊乱的可能性。确定了固体塑性变形的结构湍流条件，该条件提供了高断裂韧性。起决定性作用的是晶格曲率，纳米尺度晶格间隙中的介观结构态的出现，介观结构能级的自洽旋转运动的激活，自由体积的存在以及可能性的决定性作用。纳米级的结构转变。讨论了描述可变形固体中结构湍流的非线性理论。