Published June 21, 2003 | Version v1
Journal article Metadata-only

Strengthening mechanism for high-strain-rate superplasticity in nanocrystalline materials

Creators

  • 1. Institute of Problems of Mechanical Engineering, Russian Academy of Sciences, Bolshoj 61, Vasil. Ostrov, St Petersburg 199178 (Russian Federation)

Description

A theoretical model is suggested that describes the strengthening of nanocrystalline materials under superplastic deformation due to the effects of triple junctions of grain boundaries (GBs) as obstacles for GB sliding. In the framework of the model, dependences of the yield stress for the GB sliding on parameters of defects and triple junctions are revealed. The results of the model account for experimental data from nanocrystalline materials exhibiting superplasticity, reported in the literature. (rapid communication)

Availability note (English)

Available online at http://stacks.iop.org/0022-3727/36/L47/d312l1.pdf or at the Web site for the Journal of Physics. D, Applied Physics (ISSN 1361-6463) http://www.iop.org/

Additional details

Identifiers

URL
http://stacks.iop.org/0022-3727/36/L47/d312l1.pdf; http://www.iop.org/;
DOI
10.1088/0022-3727/36/12/101;
PII
S0022-3727(03)62007-3;

Publishing Information

Journal Title
Journal of Physics. D, Applied Physics
Journal Volume
36
Journal Issue
12
Journal Page Range
p. L47-L50
ISSN
0022-3727
CODEN
JPAPBE

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
34049916
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CREEP; CRYSTAL MODELS; DEFORMATION; GRAIN BOUNDARIES; LINE DEFECTS; NANOSTRUCTURE; PLASTICITY
Descriptors DEC
CRYSTAL DEFECTS; CRYSTAL STRUCTURE; MATHEMATICAL MODELS; MECHANICAL PROPERTIES; MICROSTRUCTURE