On the origin of the extremely high strength of ultrafine-grained Al alloys produced by severe plastic deformation

SCRIPTA MATERIALIA

卷:63

Article

Valiev, R. Z.¹  Enikeev, N. A.¹  Murashkin, M. Yu.¹  Kazykhanov, V. U.¹  Sauvage, X.² 

[1] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia

[2] Univ Rouen, Grp Phys Mat, CNRS, UMR 6634, F-76801 St Etienne, France

关键词: Ultrafine-grained materials;    Al alloys;    Hall Petch relationship;    Segregation;   

DOI  :  10.1016/j.scriptamat.2010.07.014

来源: Elsevier

【 摘 要 】

Ultrafine-grained Al alloys produced by high-pressure torsion are found to exhibit a very high strength, considerably exceeding the Hall-Petch predictions for ultrafine grains. This phenomenon can be attributed to the unique combination of ultrafine structure and deformation-induced segregations of solute elements along grain boundaries, which may affect the emission and mobility of intragranular dislocations. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free