Effects of Sn Addition on Clustering and Age-Hardening Behavior in a Pre-Aged Al-Mg-Si Alloy
| Autor: | Masaya Kozuka, Yasuhiro Aruga, Katsushi Matsumoto, Yasuo Takaki, Hisao Shishido |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Number density Mechanical Engineering Alloy Analytical chemistry 02 engineering and technology Atom probe engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Endothermic process Artificial aging law.invention Precipitation hardening Differential scanning calorimetry Mechanics of Materials law 0103 physical sciences engineering Cluster (physics) General Materials Science 0210 nano-technology |
| Zdroj: | Materials Science Forum. 877:455-460 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.877.455 |
| Popis: | The effects of Sn addition on clustering and age-hardening behavior in an Al-0.6Mg-1.0Si (mass %) alloy were investigated. Addition of Sn delayed the age-hardening in single aging at 170 ̊C. On the other hand, Sn promoted the age-hardening response in 3-step aging process which comprises a pre-aging (PA) at 90 ̊C for 18ks followed by natural aging (NA) for 604.8ks and artificial aging (AA) at 170 ̊C. The characteristics of clusters formed during PA and NA were evaluated by differential scanning calorimetry (DSC) analysis and atom probe tomography (APT). The DSC results show that the endothermic peak at around 160 ̊C to 200 ̊C was observed in the Sn-free alloy. On the other hand, in the Sn-added alloy, endothermic peak was not observed. It is suggested that Sn addition suppresses the formation of the clusters formed during NA. The APT results show that the Sn addition decreases the number density of clusters, especially smaller clusters. No Sn precipitates were found in Mg-Si precipitates formed during AA at 170 ̊C for 3.6ks. It is speculated that suppression of smaller cluster formation by addition of Sn promotes the age-hardening response |
| Databáze: | OpenAIRE |
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