Serrated flow in Al-10.5wt.%Zn
✍ Scribed by Erwin Pink; Janusz Król
- Publisher
- Elsevier Science
- Year
- 1985
- Weight
- 660 KB
- Volume
- 75
- Category
- Article
- ISSN
- 0025-5416
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## Abstract The structural changes during ageing of an alloy containing 3.5 wt.pct Zn and 4 wt.pct Mg were studied by means of transmission electron microscopy. It was shown that the precipitation process in this alloy differs from that in the alloys having high Zn/Mg ratios. The following phases w
Tensile specimens of 1Â6Â25 mm in gauge dimension were cut from the surface and centre of 12.7 mm thick 2090 Al-Li alloy plate, which were solution treated at 550 C for 30 min, peak-aged at 190 C for 18 h, or reversion-treated at 275 C for 2 min. The flow stress of the centre layer was higher than t
The stress drops Au of serrations and the time intervals At between them were analyzed as functions of strain rate and temperature. For small values of At the relation between Au and the preceding At agrees with Cottrell and Bilby's law of the aging of a stationary dislocation. As AI increases, the