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Strain hardening and microstructure evolution during uniaxial compression of ultrafine grained zirconium at temperatures of 4.2–300 K
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10.1063/1.3645014
/content/aip/journal/ltp/37/7/10.1063/1.3645014
http://aip.metastore.ingenta.com/content/aip/journal/ltp/37/7/10.1063/1.3645014
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

A transmission electron microscope light field image of a transverse cross section of a sample in the UFG structural state (a) and a histogram of the grain size distribution (b).

Image of FIG. 2.
FIG. 2.

Temperature dependence of the yield strength σ0.2 of zirconium in the UFG and CG states.

Image of FIG. 3.
FIG. 3.

Typical strain curves for UFG (a) and CG (b) Zr at different temperatures.

Image of FIG. 4.
FIG. 4.

Strain hardening coefficients at different temperatures for UFG (a) and CG (b) zirconium; the onset of stage C is shown for a temperature of 4.2 K.

Image of FIG. 5.
FIG. 5.

TEM light field images of samples of UFG Zr subjected to compressive deformation to different values of ɛ at 300 K.

Image of FIG. 6.
FIG. 6.

Pole figures (0001) of UFG Zr illustrating the evolution of the texture with increasing deformation at different temperatures (the centers of the images correspond to the direction of the axis of compression).

Image of FIG. 7.
FIG. 7.

Pole figures (0001) of CG Zr illustrating the evolution of the texture with increasing deformation at different temperatures (the centers of the images correspond to the direction of the axis of compression).

Image of FIG. 8.
FIG. 8.

Volume fraction of grains in UFG Zr for which the angle between the crystallographic c axis and the axis of compression lie within 0–15° for different temperatures and deformations (a); the volume fraction of grains in CG Zr for which the angle between the c axis and the axis of compression lies within 0–45° for different temperatures and deformations (b).

Image of FIG. 9.
FIG. 9.

The volume fraction of twinned material as a function of deformation for UFG Zr (a) and CG Zr (b) at different temperatures.

Image of FIG. 10.
FIG. 10.

Temperature dependence of the components of the internal thermal anisotropy stress tensor for zirconium:

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/content/aip/journal/ltp/37/7/10.1063/1.3645014
2011-10-06
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Strain hardening and microstructure evolution during uniaxial compression of ultrafine grained zirconium at temperatures of 4.2–300 K
http://aip.metastore.ingenta.com/content/aip/journal/ltp/37/7/10.1063/1.3645014
10.1063/1.3645014
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