Next Article in Journal
Precipitation, Recrystallization, and Evolution of Annealing Twins in a Cu-Cr-Zr Alloy
Previous Article in Journal
Room Temperature Mechanical Properties of A356 Alloy with Ni Additions from 0.5 Wt to 2 Wt %
Previous Article in Special Issue
FeS Corrosion Products Formation and Hydrogen Uptake in a Sour Environment for Quenched & Tempered Steel
Article

Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments

1
CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2
University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China
*
Authors to whom correspondence should be addressed.
Metals 2018, 8(4), 225; https://doi.org/10.3390/met8040225
Received: 14 February 2018 / Revised: 22 March 2018 / Accepted: 28 March 2018 / Published: 29 March 2018
(This article belongs to the Special Issue Environmentally Assisted Cracking in Advanced High Strength Alloys)
Stress corrosion cracking (SCC) susceptibilities of Al-Zn-Mg alloys without and with Scandium addition were evaluated in 3.5% NaCl solution at different pH and different strain rate, using slow strain rate test technique. The results indicate that Sc addition reduces grain size and width of precipitation free zones, and transforms grain boundary precipitates from continuous distribution into interrupted distribution by inhibiting recrystallization. In solution at pH 1, pH 3 and pH 7, Sc addition reduces the degree of localized corrosion of alloy surface and SCC susceptibility of Al-Zn-Mg alloy. However, in solution at pH 10 and pH 12, grain refinement significantly promotes the diffusion of hydrogen atoms into matrix, thus Sc addition increases SCC susceptibility of Al-Zn-Mg alloy. Under different strain rate conditions, Sc addition can all reduce SCC susceptibility of Al-Zn-Mg alloy in solution at pH 1, pH 3 and pH 7, and can all increase SCC susceptibility of Al-Zn-Mg alloy in solution at pH 10 and pH 12. As a result, Sc modified Al-Zn-Mg alloy in practical applications should be avoided in alkaline environments. View Full-Text
Keywords: Al-Zn-Mg alloy; solution pH; strain rate; stress corrosion cracking susceptibility Al-Zn-Mg alloy; solution pH; strain rate; stress corrosion cracking susceptibility
Show Figures

Figure 1

MDPI and ACS Style

Li, Z.; Jiang, H.; Yan, D.; Rong, L. Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments. Metals 2018, 8, 225. https://doi.org/10.3390/met8040225

AMA Style

Li Z, Jiang H, Yan D, Rong L. Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments. Metals. 2018; 8(4):225. https://doi.org/10.3390/met8040225

Chicago/Turabian Style

Li, Zhaoming, Haichang Jiang, Desheng Yan, and Lijian Rong. 2018. "Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments" Metals 8, no. 4: 225. https://doi.org/10.3390/met8040225

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

Article Access Map by Country/Region

1
Back to TopTop