Studies on strain-hardening models for structural steels at a directed reduction in sizes of their structural elements

被引：0
|
作者：
S. B. Nizhnik
E. A. Dmitrieva
机构：
[1] National Academy of Sciences of Ukraine,Timoshenko Institute of Mechanics
来源：
Strength of Materials | 2011年 / 43卷
关键词：
strain-hardening models; steels; structural deformation levels; prefracture zone near the crack tip;
D O I：
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学科分类号：
摘要：
A number of structural-mechanical strain-hardening models was analyzed, they were experimentally approved on austenitic and ferritic-pearlitic steels at a successive reduction in the sizes of their structural elements by thermomechanical treatments. The effect of a crystalline lattice of the matrix phase on the evolution of the steel structure, from the grain and mesolevels to micro-and nanolevels, was examined. The influence of a Mode I crack on an enhanced martensite transformation near its tip was noticed, which caused a simultaneous increase in the strength and cyclic fracture toughness of austenitic steel.
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页码：464 / 470
页数：6
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