A Study on the Susceptibility to SCC of 7050 Aluminum Alloy by DCB Specimens
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 ti...
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MDPI AG
2016-11-01
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| Series: | Materials |
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| Online Access: | http://www.mdpi.com/1996-1944/9/11/884 |
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| author | Xing Qi Jirong Jin Chunli Dai Wenjuan Qi Wangzhao He Renguo Song |
| author_facet | Xing Qi Jirong Jin Chunli Dai Wenjuan Qi Wangzhao He Renguo Song |
| author_sort | Xing Qi |
| collection | DOAJ |
| description | 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. |
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| id | doaj.art-80fe39b1c02040cfb847ca7719a80af6 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-13T02:08:23Z |
| publishDate | 2016-11-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-80fe39b1c02040cfb847ca7719a80af62022-12-22T03:07:22ZengMDPI AGMaterials1996-19442016-11-0191188410.3390/ma9110884ma9110884A Study on the Susceptibility to SCC of 7050 Aluminum Alloy by DCB SpecimensXing Qi0Jirong Jin1Chunli Dai2Wenjuan Qi3Wangzhao He4Renguo Song5Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, ChinaJiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaJiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, ChinaJiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, ChinaJiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, ChinaThe 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.http://www.mdpi.com/1996-1944/9/11/8847050 aluminum alloystress corrosion crackingDCB specimenagingcathodic polarization |
| spellingShingle | Xing Qi Jirong Jin Chunli Dai Wenjuan Qi Wangzhao He Renguo Song A Study on the Susceptibility to SCC of 7050 Aluminum Alloy by DCB Specimens Materials 7050 aluminum alloy stress corrosion cracking DCB specimen aging cathodic polarization |
| title | A Study on the Susceptibility to SCC of 7050 Aluminum Alloy by DCB Specimens |
| title_full | A Study on the Susceptibility to SCC of 7050 Aluminum Alloy by DCB Specimens |
| title_fullStr | A Study on the Susceptibility to SCC of 7050 Aluminum Alloy by DCB Specimens |
| title_full_unstemmed | A Study on the Susceptibility to SCC of 7050 Aluminum Alloy by DCB Specimens |
| title_short | A Study on the Susceptibility to SCC of 7050 Aluminum Alloy by DCB Specimens |
| title_sort | study on the susceptibility to scc of 7050 aluminum alloy by dcb specimens |
| topic | 7050 aluminum alloy stress corrosion cracking DCB specimen aging cathodic polarization |
| url | http://www.mdpi.com/1996-1944/9/11/884 |
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