Macroscopic and Microscopic Descriptions of the Plastic Deformation of Fcc Metals over a Wide Range of Strain and Temperature

• Authors: T. Csanádi , N. Chinh , J. Gubicza , T. Langdon
• Languages of publication: EN

Abstracts

EN

The plastic behavior of face-centered cubic metals was investigated over a wide range of strain and testing temperature. The experimental stress-strain data were described using both macroscopic and microscopic, well-established relationships. The characteristics of these descriptions are discussed and compared with each other. The analysis of the characteristics leads to a definition of the low and high temperature deformation regions, where the kinetics of both the dislocation-multiplication and the dislocation-annihilation (recovery) are different. For pure aluminum, it is shown that the boundary between these two regions occurs at a homologous temperature of the order of ≈ 0.5 T_{m} where T_{m} is the absolute melting temperature. From this analysis, correlations are also drawn between the macroscopic parameters describing the stress-strain relationship and the fundamental characteristics of the microscopic processes both at room temperature and elevated temperatures.

Keywords

EN

61.66.Bi; 83.50.Uv; 65.40.-b; 81.40.Jj; 61.72.Cc

Discipline

• 61.72.Cc: Kinetics of defect formation and annealing
• 65.40.-b: Thermal properties of crystalline solids
• 83.50.Uv: Material processing (extension, molding, etc.)
• 61.66.Bi: Elemental solids
• 81.40.Jj: Elasticity and anelasticity, stress-strain relations

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 3
• Pages: 630-633

Dates

published

2012-09

Contributors

author

T. Csanádi

• Department of Materials Physics, Eötvös University Budapest H-1117 Budapest, Pázmány P. sétány 1/A., Hungary,

author

N. Chinh

• Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453, USA,

author

J. Gubicza

• Department of Materials Physics, Eötvös University Budapest H-1117 Budapest, Pázmány P. sétány 1/A., Hungary,

author

T. Langdon

• Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453, USA,
• Materials Research Group, School of Engineering Sciences, University of Southampton, Southampton SO17 1BJ, U.K.

References

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Identifiers

DOI

10.12693/APhysPolA.122.630