PLASTIC DEFORMATION THROUGH DE-TWINNING MEDIATED BY INCOHERENT TWIN BOUNDARIES IN NANOTWINNED METALLIC ALLOYS

被引：0
作者：
Ovid'ko, I. A. [1 ,2 ,3 ]
Sheinerman, A. G. [1 ,2 ,3 ]
机构：
[1] Peter Great St Petersburg Polytech Univ, Res Lab Mech New Nanomat, St Petersburg 195251, Russia
[2] St Petersburg State Univ, 7-9 Univ Skaya Nab, St Petersburg 199034, Russia
[3] Russian Acad Sci, Inst Problems Mech Engn, Bolshoj 61, St Petersburg 199178, Russia
来源：
REVIEWS ON ADVANCED MATERIALS SCIENCE | 2016年 / 47卷 / 1-2期
关键词：
ULTRAFINE-GRAINED METALS; CENTERED-CUBIC METALS; NANOCRYSTALLINE MATERIALS; MECHANICAL-BEHAVIOR; THERMAL-STABILITY; NANOSTRUCTURED METALS; LATTICE DISLOCATIONS; MAXIMUM STRENGTH; BINARY-ALLOYS; GROWTH TWINS;
D O I：
暂无
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We suggest a theoretical model that describes the effects of solute atoms on plastic deformation through de-twinning processes mediated by incoherent twin boundaries (ITBs) in nanotwinned metallic alloys under a mechanical load. Within the model, the regions near ITBs contain the segregations of solute atoms formed during the fabrication of nanotwinned alloys in the stress fields of the dislocations composing ITBs. The critical parameters are calculated which characterize de-twinning processes in Cu-based nanotwinned alloys containing low concentrations of Ni, Zn or Al. By comparison of these critical parameters with those specifying pure nanotwinned Cu, it is concluded that solute atoms can effectively strengthen nanotwinned alloys.
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页码：1 / 8
页数：8
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