Monitoring of Self-Annealing in Ultrafine-Grained Silver Using Nanoindentation

被引：7
|
作者：
Gubicza, Jeno [1 ]
Chinh, Nguyen Q. [1 ]
Langdon, Terence G. [2 ,3 ,4 ]
机构：
[1] Eotvos Lorand Univ, Dept Mat Phys, H-1117 Budapest, Hungary
[2] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA
[3] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA
[4] Univ Southampton, Sch Engn Sci, Mat Res Grp, Southampton SO17 1BJ, Hants, England
来源：
NANOSCIENCE AND NANOTECHNOLOGY LETTERS | 2010年 / 2卷 / 04期
基金：
匈牙利科学研究基金会;
关键词：
Severe Plastic Deformation; Equal-Channel Angular Pressing; Ultrafine-Grained Materials; Recovery; Recrystallization; Nanoindentation; PLASTIC-DEFORMATION; MICROSTRUCTURE; METALS; RECRYSTALLIZATION; CRYSTALS; TEXTURE; MODEL; CU;
D O I：
10.1166/nnl.2010.1096
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The self-annealing of an ultrafine-grained (UFG) microstructure in pure silver produced by severe plastic deformation (SPD) was studied by nanoindentation and X-ray line profile analysis. Both recovery and recrystallization of the UFG structure take place during long-term storage at room temperature as a result of the extremely high dislocation density which acts as a driving force in self-annealing. Nanohardness mapping revealed that self-annealing occurred inhomogeneously, and the higher strain imposed in SPD processing leads to faster recrystallization in severely deformed silver. This behavior of self-annealing can be explained by the enhanced contribution of twinning which facilitates the formation of recrystallized embryos.
引用
收藏
页码：294 / 297
页数：4
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