A Study of Fatigue Crack Growth Rate in Steels in Relation to Crack-Tip Plastic Deformation and Fracture. Part 1. Test Methods and Results for 10GN2MFA Steel

被引：2

作者：

Tsybanev, G. V. ^{[1
]}

Gopkalo, A. P. ^{[1
]}

Kurash, Yu. P. ^{[1
]}

Novikov, A. I. ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, Pisarenko Inst Problems Strength, Kiev, Ukraine

来源：

STRENGTH OF MATERIALS | 2020年 / 52卷 / 02期

关键词：

low-cycle deformation; fatigue crack growth resistance; cyclic hardening-softening; fatigue crack growth rate curve; temperature; PROPAGATION; MODEL; PREDICTION; INITIATION;

D O I：

10.1007/s11223-020-00169-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The methods for low-cycle fatigue testing and cyclic crack growth testing of 10GN2MFA steel at 20 and 270 degrees C are described. Based on test results, fatigue crack growth rate curves are plotted and the characteristics of low-cycle plastic deformation and fracture are found. A difference in the kinetics of low-cycle plastic deformation is shown - the cyclic softening at 20 degrees C and hardening at 270 degrees C - which has an influence on fatigue life and fatigue crack growth resistance of this steel. The last-mentioned characteristic has been studied using two test methods: (i) with a decreasing stress intensity factor range and (ii) with a constant magnitude of load.

引用

页码：228 / 234

页数：7

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