Nonmonotonic Rate Dependence of the Dynamic Yield Strength of Alloys under High Strain Rate Deformation

被引：0
|
作者：
Malashenko, V. V. [1 ,2 ]
机构：
[1] Galkin Donetsk Inst Phys & Engn, Donetsk, Ukraine
[2] Donetsk Natl Univ, Donetsk, Ukraine
来源：
PHYSICS OF THE SOLID STATE | 2021年 / 63卷 / 10期
基金：
日本学术振兴会;
关键词：
dislocations; high-rate deformation; defects; Guinier-Preston zones; STRESS; TEMPERATURE; TITANIUM; FRACTURE;
D O I：
10.1134/S1063783421090249
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The glide of edge dislocations in an aged binary alloy under high strain rate deformation is studied theoretically. An analytic expression has been obtained for the rate dependence of the dynamic yield strength. The conditions at which the plot of the rate dependence can have two maxima and two minima have been found. The existence of two the maxima is related to the existence of two types of defects having significantly different sizes (the second component atoms and the Guinier-Preston zones). The minima take place in going from the predominance of dynamic drag by one type of defects to the predominance of the defects of another type. The maxima appear as the character of the drag by the dominant defects is changed.
引用
收藏
页码：1462 / 1464
页数：3
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