| Autor: |
Elena Avtokratova, Michael Markushev, Oleg Sitdikov, Oksana Mukhametdinova, Dayan Nugmanov, R R Ilyasov |
| Rok vydání: |
2016 |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings. |
| ISSN: |
0094-243X |
| DOI: |
10.1063/1.4966453 |
| Popis: |
The effect of the size of nanoscale Al3(Sc, Zr) precipitates on the grain refinement in 1570C Al alloy (Al-5Mg-0.2Sc-0.08Zr-0.002Be) during multidirectional isothermal forging (MIF) to the total true strain 4.2 at 450°C (0.77Tm) is investigated. At early MIF stages, arrays of new fine (sub)grains with low- and high-angle boundaries are formed near original grain boundaries followed by an increase in their number and boundary misorientations at larger strains. It is shown that in an alloy with finer dispersoids the grain structure with a less volume fraction and size of fine grains as well as with a less fraction of high-angle boundaries and average misorientation of deformation-induced boundaries is developed. The role of dispersed phases in the alloy grain refinement at elevated temperature is discussed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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