Interrelation between local and global characteristics of cleavage fracture

被引：0
|
作者：
Grishchenko, W. [1 ]
Kotrechko, S. [1 ]
Mamedov, S. [1 ]
Zatsarna, O. [1 ]
Dlouhy, I [2 ]
机构：
[1] GV Kurdyumov Inst Met Phys NASU, 36 Vernadsky Blvd, UA-03142 Kiev, Ukraine
[2] Acad Sci Czech Republic, Inst Phys Mat, Brno, Czech Republic
来源：
MATERIALS STRUCTURE & MICROMECHANICS OF FRACTURE VII | 2014年 / 592-593卷
关键词：
local stress; fracture; cleavage; embrittlement; strength; FERRITIC STEEL; TOUGHNESS;
D O I：
10.4028/www.scientific.net/KEM.592-593.221
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The complexity of calibration procedure for determination of Weibull distribution parameters as well as necessity to perform FEM calculations is one of the shortcomings of conventional versions of Local Approach (LA). This report presents an attempt to ascertain interrelation between local and global characteristics of fracture of pre-cracked and notched specimens of reactor pressure vessel steels, high-strength steels etc. Criterion of cleavage fracture initiation ahead of a crack (notch) is formulated. Dimensionless parameter characterizing the effect of embrittlement by the crack or notch is proposed on the basis of this criterion. Based on the findings of low-temperature tests of pre-cracked or notched specimens of structural steels, it is proved that this parameter may be determined by both local and global characteristics.
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页码：221 / +
页数：2
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