Speaker
Description
Natural aging of Al–Mg–Si alloys is a complex process, which is not fully understood yet. Nonetheless, it is widely known that for the EN AW6082 alloy natural aging has a negative effect. For the alloy EN AW6060, however, natural aging was assumed to have a beneficial influence on the hardening potential. Contradicting these assumptions, our studies showed that not only the type of alloy but also the alloy composition influences the impact of natural aging. Within the same alloy positive and negative effects were observed, which led to the determination of a threshold. This has great importance for industrial applications since allegedly same alloys processed with the same thermomechanical parameters possess different mechanical properties.
In further experiments it was evaluated if the effect of natural aging in low alloyed 6xxx also maintains when adding contributions of 0.05 wt% Sc. Long term analyzes of hardness were performed, where
• the material was stored at room temperature after solution heat treatment (T4 process)
• the material was artificially aged with varying aging times after being solution heat treated (T6 process)
| Speaker Country | Austria |
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