TY - JOUR
T1 - Effect of strain rate on stress corrosion cracking of TC4-0.55% Fe alloy in simulated seawater solution
AU - Duan, Weiwei
AU - Dan, Zhenhua
AU - Chang, Hui
AU - Shi, Hongqi
AU - Zhu, Xiaoxian
AU - Li, Guangzhou
AU - Gu, Yuanyu
AU - Zhou, Lian
N1 - Publisher Copyright:
© 2018, Shanghai Research Institute of Materials. All rights reserved.
PY - 2018/9
Y1 - 2018/9
N2 - The stress corrosion cracking (SCC) performance of TC4-0.55% Fe alloy in simulated seawater solution was investigated by electrochemical measurements, slow strain rate test (SSRT) and scanning electron microscopy (SEM). The effect of strain rate (changed from 3.3×10-6 s-1-10.0×10-6 s-1) on SCC behavior of the alloy was revealed. The results showed that TC4-0.55% Fe alloy possessed the maximum SCC susceptibility at the strain rate of 5.0×10-6 s-1 in the simulated seawater solution, the fracture surface was dominated by flattened dimples, with obvious tearing edges between the dimples, and the quasi-cleavage fracture surface appeared in the middle region of the fracture. When the strain rate was higher than 6.6×10-6 s-1, the fracture surface was changed from small and shallow dimples to large and deep dimples. Therefore, tensile stress made the specimen fractured rapidly at high strain rates, and the SCC susceptibility of the alloy was very small, its fracture showed typical ductile fracture with appreciable dimples.
AB - The stress corrosion cracking (SCC) performance of TC4-0.55% Fe alloy in simulated seawater solution was investigated by electrochemical measurements, slow strain rate test (SSRT) and scanning electron microscopy (SEM). The effect of strain rate (changed from 3.3×10-6 s-1-10.0×10-6 s-1) on SCC behavior of the alloy was revealed. The results showed that TC4-0.55% Fe alloy possessed the maximum SCC susceptibility at the strain rate of 5.0×10-6 s-1 in the simulated seawater solution, the fracture surface was dominated by flattened dimples, with obvious tearing edges between the dimples, and the quasi-cleavage fracture surface appeared in the middle region of the fracture. When the strain rate was higher than 6.6×10-6 s-1, the fracture surface was changed from small and shallow dimples to large and deep dimples. Therefore, tensile stress made the specimen fractured rapidly at high strain rates, and the SCC susceptibility of the alloy was very small, its fracture showed typical ductile fracture with appreciable dimples.
KW - Slow strain rate test (SSRT)
KW - Strain rate
KW - Stress corrosion cracking (SCC)
KW - TC4-0.55% Fe alloy
UR - http://www.scopus.com/inward/record.url?scp=85074985265&partnerID=8YFLogxK
U2 - 10.11973/fsyfh-201809008
DO - 10.11973/fsyfh-201809008
M3 - 文章
AN - SCOPUS:85074985265
SN - 1005-748X
VL - 39
SP - 689
EP - 693
JO - Corrosion and Protection
JF - Corrosion and Protection
IS - 9
M1 - 1005-748X(2018)09-0689-05
ER -