Evolution of microstructural homogeneity in copper processed by high-pressure torsion

Disks of coarse-grained pure Cu were processed by high-pressure torsion (HPT) and the microhardness and microstructural parameters were used to reveal the evolution of homogeneity. It is shown that the microstructures at the centers of the disks are significantly refined by HPT and an essentially ho...

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Bibliographic Details
Published inScripta materialia Vol. 63; no. 5; pp. 560 - 563
Main Authors An, X.H., Wu, S.D., Zhang, Z.F., Figueiredo, R.B., Gao, N., Langdon, T.G.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.09.2010
Subjects
Copper
Disks
Evolution
GRAIN SIZE AND SHAPE
HARDNESS
HIGH PRESSURE
High-pressure torsion
Homogeneity
Microhardness
Microstructure
MICROSTRUCTURES
Stacking fault energy
STRAIN
Torsion
Homogeneity
Copper
Microhardness
High-pressure torsion
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Summary:Disks of coarse-grained pure Cu were processed by high-pressure torsion (HPT) and the microhardness and microstructural parameters were used to reveal the evolution of homogeneity. It is shown that the microstructures at the centers of the disks are significantly refined by HPT and an essentially homogeneous microstructure is achieved at strains above ∼15. An analysis demonstrates that microstructural homogeneity is achieved most readily in materials having either high or low, rather than intermediate, stacking fault energies.
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ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2010.05.030