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http://dx.doi.org/10.3740/MRSK.2002.12.6.436

Effect of Sn Addition on the SCC Properties of Al-Cu-Mn Cast Alloy  

Kim, Kwang-Nyeon (Dept.of Materials Science Engineeirng, Busan National University)
Kim, Kyung-Hyun (Korea Institute of Machinery and Materials)
Kim, In-Bae (Dept.of Materials Science Engineeirng, Busan National University)
Publication Information
Korean Journal of Materials Research / v.12, no.6, 2002 , pp. 436-441 More about this Journal
Abstract
Effect of Sn addition on the stress corrosion cracking(SCC) resistance of the Al-Cu-Mn cast alley was investigated by C-ring teat and electrical conductivity measurement, The electrical conductivity and SCC resistance increased by Sn addition. The alley containing 0,10%Sn showed maximum electrical conductivity and the best SCC resistance. At the same composition, the electrical conductivity and SCC resistance increased from peak aged condition to ever aged condition. The PFZ and coarse precipitates along the grain boundary were observed from TEM micrographs. The fracture mode of the alloy was confirmed as intergranular type and showed brittle fracture surface. The SCC mechanism of the alloy was concluded as the anodic dissolution model, The maximum hardness was increased from 130Hv in the Sn-free alloy to 156Hv in the 0.10%Sn added alloy.
Keywords
Al-Cu-Mn cast allay; Effect of Sn addition; SCC resistance; Electrical conductivity; Intergranular fracture; Anedie dissolution medel; Miero-hardness; PFZ;
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