SCC evaluation on welding samples of 7A52 aluminum alloy

The susceptibility of welding samples of 7A52 aluminum alloy to stress corrosion cracking (SCC) was evaluated using the slow strain rate test (SSRT) and direct tension stress corrosion test. The microstructure was also investigated after the SCC test. The results show low susceptibility to SCC of we...

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Bibliographic Details
Published inCai liao gong cheng = Journal of materials engineering no. 10; pp. 86 - 97
Main Authors Zhang, Xiao-Yun, Mei, Ke-Li, Xiong, Wen-Hua, Guo, Meng-Qiu, Gao, Jian
Format Journal Article
LanguageChinese
Published 01.10.2013
Subjects
Aluminum base alloys
Cracking (fracturing)
Fracture mechanics
Inertia
Materials engineering
Stress corrosion cracking
Stresses
Welding
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Summary:The susceptibility of welding samples of 7A52 aluminum alloy to stress corrosion cracking (SCC) was evaluated using the slow strain rate test (SSRT) and direct tension stress corrosion test. The microstructure was also investigated after the SCC test. The results show low susceptibility to SCC of welding joint by 5A56 welding wire, metal inertia gas (MIG) procedure welded from both side. It is also possible SCC at high level stress and high temperature. The SEM indicated there are pores in welding part. High SCC sensitivity was expressed in high temperature or stress level. Secondary cracking existed on the fracture surface, large size secondary cracking increases obviously with the higher of stress level.
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ISSN:1001-4381
DOI:10.3969/j.issn.1001-4381.2013.10.015