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MECHANISMS OF DYNAMIC REARRANGEMENT OF THE DEFECT SUBSTRUCTURE OF INDUSTRIAL STEELS

机译:工业钢的缺陷亚结构的动态重排机理

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The initial stage of dynamic recrystallization initiated in steels by a high-current electron beam has been studied using the TEM method. It has been shown that the degree of dynamic recrystallization is dictated by the value of the stacking fault energy γ_(SF). In steels with relatively low values of γ_(SF) (15-20 mJ/m~2), centers of dynamic recrystallization develop by the mechanism of pair coalescence of subgrains, no matter what the crystalline lattice type is. The increase in γ_(SF) up to 35-40 mJ/m~2 causes a changeover in the mechanism of multiple subgrain coalescence. At much higher values of γ_(SF), dynamic recrystallization evolves by migration of local regions of large-angle grain boundaries.
机译:使用TEM方法研究了由高电流电子束在钢中引发的动态再结晶的初始阶段。已经表明,动态再结晶的程度取决于堆垛层错能量γ_(SF)的值。在γ_(SF)值相对较低(15-20 mJ / m〜2)的钢中,无论何种晶格类型,亚晶粒的成对结合机制都会形成动态再结晶中心。高达35-40 mJ / m〜2的γ_(SF)的增加引起了多个亚晶粒聚结机理的转变。当γ_(SF)的值高得多时,动态再结晶通过大角度晶界局部区域的迁移而演化。

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