Next Article in Journal
Treatment of Oil Wastewater and Electricity Generation by Integrating Constructed Wetland with Microbial Fuel Cell
Next Article in Special Issue
Stress Corrosion Cracking Susceptibility of 304L Substrate and 308L Weld Metal Exposed to a Salt Spray
Previous Article in Journal
Investigation of Electric Field–Induced Structural Changes at Fe-Doped SrTiO3 Anode Interfaces by Second Harmonic Generation
Previous Article in Special Issue
A Modelling Study for Predicting Life of Downhole Tubes Considering Service Environmental Parameters and Stress
Article Menu
Issue 11 (November) cover image

Export Article

Open AccessArticle
Materials 2016, 9(11), 884;

A Study on the Susceptibility to SCC of 7050 Aluminum Alloy by DCB Specimens

Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, China
Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, China
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Author to whom correspondence should be addressed.
Academic Editor: Alex A. Volinsky
Received: 15 August 2016 / Revised: 21 October 2016 / Accepted: 26 October 2016 / Published: 1 November 2016
(This article belongs to the Special Issue Stress Corrosion Cracking in Materials)
Full-Text   |   PDF [15468 KB, uploaded 1 November 2016]   |  


The stress corrosion cracking (SCC) of different aging states for 7050 aluminum alloy in 3.5% sodium chloride aqueous solution has been studied by means of double cantilever beam (DCB) specimens, cathodic polarization, scanning electron microscope (SEM), transmission electron microscope (TEM) and time-of-flying second ion mass spectrometer (ToF-SIMS). The results showed that the susceptibility to SCC (Iscc) of 7050 aluminum alloy decreases with increasing the aging time. When a cathodic polarization potential of −1100 mV was applied to DCB specimens, the ion current intensity of hydrogen (IH+) near the crack tip and Iscc increased obviously, thus the degree of the diffusion of hydrogen into the grain boundary become more serious. The observation of microstructure indicated that the precipitates on the grain boundary become coarse and are sparsely distributed with increasing the aging time of 7050 aluminum alloy. View Full-Text
Keywords: 7050 aluminum alloy; stress corrosion cracking; DCB specimen; aging; cathodic polarization 7050 aluminum alloy; stress corrosion cracking; DCB specimen; aging; cathodic polarization

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Qi, X.; Jin, J.; Dai, C.; Qi, W.; He, W.; Song, R. A Study on the Susceptibility to SCC of 7050 Aluminum Alloy by DCB Specimens. Materials 2016, 9, 884.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top