Ultrafine Grained Structures Resulting from SPD-Induced Phase Transformation in Al-Zn Alloys

Sauvage Xavier; Murashkin Maxim Yu.; Straumal Boris B.Bobruk Elena V.Valiev Ruslan Z.

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Ultrafine Grained Structures Resulting from SPD-Induced Phase Transformation in Al-Zn Alloys

机译：Ultrafine Grained Structures Resulting from SPD-Induced Phase Transformation in Al-Zn Alloys

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Three different Al-Zn alloys (2, 10, 30 wt Zn) have been processed by severe plastic deformation (SPD) in the solutionized state to investigate the concomitant mechanisms of grain refinement and phase separation. The data of high resolution analytical transmission electron microscopy clearly reveal the key role of grain boundaries that promote Zn segregation and fast diffusion. Surprisingly, it is also shown that SPD carried out at 150 degrees C could give rise to a finer multiphase structure comparing to room temperature processing. Our observations seem to indicate that it resulted from a competition between the classical discontinuous precipitation of Zn and SPD-induced dynamic precipitation.

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《Advanced Engineering Materials》 |2015年第12期|1821-1827|共7页
作者
Sauvage Xavier; Murashkin Maxim Yu.; Straumal Boris B.Bobruk Elena V.Valiev Ruslan Z.;
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作者单位

Univ St Etienne Rouvray, Grp Phys Mat, UMR CNRS 6634, F-76801 St Etienne, France;

Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 45000, Russia;

State Univ, Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia;

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正文语种英语
中图分类工程材料学;
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Ultrafine Grained Structures Resulting from SPD-Induced Phase Transformation in Al-Zn Alloys

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