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

页码：294 / 297

页数：4

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