Validity of a new fracture mechanics technique for the determination of the threshold stress intensity factor for stress corrosion cracking (KIscc) and crack growth rate of engineering materials

被引：28
|
作者：
Ibrahim, R. N. [1 ]
Rihan, R. [1 ]
Raman, R. K. Singh [1 ,2 ]
机构：
[1] Monash Univ, Dept Mech Engn, Melbourne, Vic 3800, Australia
[2] Monash Univ, Dept Chem Engn, Melbourne, Vic 3800, Australia
来源：
ENGINEERING FRACTURE MECHANICS | 2008年 / 75卷 / 06期
关键词：
stress corrosion cracking (SCC); stress intensity factor (K-I); threshold stress intensity factor (K-Iscc); crack growth rate; circumferential notched tensile (CNT) specimen;
D O I：
10.1016/j.engfracmech.2007.06.007
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A novel fracture mechanics technique has been employed for the determination of crack growth rate and threshold stress intensity factor for stress corrosion cracking (K-Iscc ) using small circumferential notch tensile (CNT) specimens. The technique was applied successfully for testing SCC susceptibility of heat treated 4340 steel in sodium chloride (NaCl) solutions at room temperature. Crack growth rates have been determined at different stress intensity factors (K-I), and the K-Iscc has been determined to be 15 MPa m(1/2). The obtained K-Iscc value using CNT specimen was found to be very close to K-Iscc values obtained by others using standard specimens.(C) 2007 Elsevier Ltd. All rights reserved.
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页码：1623 / 1634
页数：12
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