Journal of Guangdong University of Technology ›› 2010, Vol. 27 ›› Issue (2): 43-46.

• Comprehensive Studies • Previous Articles     Next Articles

The Efects of Polarization Potential on Stress Corrosion Cracking(SCC) Behavior of Aluminum Alloy 5083

  

  1. 1．Faculty of Materials and Energy，Guangdong University of Technology，Guangzhou 5 10006，China；
    2．Guangdong Xingfa Aluminum Co．Ltd．，Foshan 528061，China
  • Online:2010-06-25 Published:2010-06-25

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Abstract: The effects of polarization potential on stress corrosion cracking(SCC)behavior of 5083 aluminum alloy are investigated by using slow strain rate tension(SSRT)test，SEM，and EDS．The experimental results reveal that under cathodic polarization the values of SCC susceptibility(Issrt)are minimum，the susceptibility is the weakest，and the fracture is a quasi-cleavage one without a few dipples while under anode polarization the values of Issrt are
maximum，the susceptibility is the s~ongest，lots of transverse cracks exist on the fracture surface，and the edges ale corroded．Moreover，the morphology is cleavage-shaped with lots of transgranular and intergranular cracks，belonging to the brittle fracture．SCC behavior of 5083 aluminum is of anodic dissolution．

Key words: 5083 aluminum alloy；polarization potential；SCC susceptibility

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