On the origin of the extremely high strength of ultrafine-grained Al alloys produced by severe plastic deformation
On the origin of the extremely high strength of ultrafine-grained Al alloys produced by severe plastic deformation
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DOI：
10.1016/j.scriptamat.2010.07.014
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发表时间：
2010-11-01
影响因子：
6
通讯作者：
Sauvage, X.
中科院分区：
文献类型：
--
作者：
Valiev, R. Z.;Enikeev, N. A.;Sauvage, X.
通过高压扭转产生的超细晶铝合金被发现表现出非常高的强度，大大超过了Hall-Petch对超细晶粒的预测。这种现象可以归因于超细结构和变形引起的溶质元素沿沿着偏聚的独特组合，这可能影响晶内位错的发射和迁移。(C)2010 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
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.