Microstructure and mechanical properties of strip cast Al-Mg-Si-X alloys
SCIE
SCOPUS
- Title
- Microstructure and mechanical properties of strip cast Al-Mg-Si-X alloys
- Authors
- Park, YS; Lee, SB; Kim, NJ
- Date Issued
- 2003-12
- Publisher
- JAPAN INST METALS
- Abstract
- A study has been conducted on the microstructure and mechanical properties of strip cast A16061 alloy with and without a 0.5 mass% Mn addition. The microstructures of the as-east alloys are characterized by the presence of Si particles (<1 mum) and clusters of fine alpha-AlFeSi particles (< 50 nm) along grain boundaries. In addition, there is the development of well-defined subgrains caused by the effects of hot rolling during strip casting. By T6 heat treatment, Si particles along grain boundaries are replaced by fine alpha-AlFeSi particles. There is also a formation of alpha-AlFeSi particles within the Al matrix by heat treatment. The addition of Mn results in an increase in the volume fraction of alpha-AlFe(Mn)Si particles within the Al matrix, which is associated with a corresponding decrease in the volume fraction Of Mg2Si precipitates within the Al matrix over that observed in the base alloy. Accordingly, the Mn containing alloy shows a lower yield strength but a higher ultimate tensile strength due to a greater work hardening rate than the base alloy. The increased work hardening rate of the Mn containing alloy is due to the presence of uniformly distributed fine alpha-AlFe(Mn)Si particles within the Al matrix. The present study shows that strip casting is a viable process for the fabrication of structural Al alloys.
- Keywords
- strip casting; 6061 Al alloy; AlFeSi; STAINLESS-STEEL; PRECIPITATION; BEHAVIOR; SILICIDE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29746
- DOI
- 10.2320/matertrans.44.2617
- ISSN
- 1345-9678
- Article Type
- Article
- Citation
- MATERIALS TRANSACTIONS, vol. 44, no. 12, page. 2617 - 2624, 2003-12
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