## Abstract

Three was found little data on the properties of the binary alloy system of uranium-gallium. Therefore, it was chosen to make an extensive investigation of the crystal-phase transformations, crystallography and metallography of this alloy system. Various many experimental techniques were employed. The investigation provided information on the morphology of dilute U(Ga) alloys, on the kinetics and on the mechanism of the crystallography of the martensitic transformation {beta}-->{alpha}`. The main results are: (a) Gallium is soluble in the allotropic {tau} and {beta}-uranium phases. (b) The {delta}-phase corresponds to the stoichiometric U{sub 3}Ga{sub 5} compound. (c) Gallium is a {beta}-stabilizing element similar to chromium. (d) The {beta}-phase is unstable at room temperature and undergoes ultimately a shear-like transformation into the {alpha}`-U, which itself is a metastable variant of the {alpha}-U structure. (e) Ultrasonic sound velocity measurements were used to determine the elastic constants, Young, shear and bulk moduli of the polycrystalline {beta}-stabilized uranium 1.6at.%Ga and uranium 2.3at.%Ga alloys between 77 and 300 deg K. (f) Transmission electron microscopy was used to study the crystallography of the martensitic transformation taking place in an U-1.6at.%Ga alloy. (g) The atomistic model proposed for the {beta}-->{alpha} transformation in U(Ga) alloy is based on the crystallographic results
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## Citation Formats

Dayan, David.
Study of the phase transformations and microstructures of uranium rich alloys of the binary uranium-gallium system.
Israel: N. p.,
1994.
Web.

Dayan, David.
Study of the phase transformations and microstructures of uranium rich alloys of the binary uranium-gallium system.
Israel.

Dayan, David.
1994.
"Study of the phase transformations and microstructures of uranium rich alloys of the binary uranium-gallium system."
Israel.

@misc{etde_10103464,

title = {Study of the phase transformations and microstructures of uranium rich alloys of the binary uranium-gallium system}

author = {Dayan, David}

abstractNote = {Three was found little data on the properties of the binary alloy system of uranium-gallium. Therefore, it was chosen to make an extensive investigation of the crystal-phase transformations, crystallography and metallography of this alloy system. Various many experimental techniques were employed. The investigation provided information on the morphology of dilute U(Ga) alloys, on the kinetics and on the mechanism of the crystallography of the martensitic transformation {beta}-->{alpha}`. The main results are: (a) Gallium is soluble in the allotropic {tau} and {beta}-uranium phases. (b) The {delta}-phase corresponds to the stoichiometric U{sub 3}Ga{sub 5} compound. (c) Gallium is a {beta}-stabilizing element similar to chromium. (d) The {beta}-phase is unstable at room temperature and undergoes ultimately a shear-like transformation into the {alpha}`-U, which itself is a metastable variant of the {alpha}-U structure. (e) Ultrasonic sound velocity measurements were used to determine the elastic constants, Young, shear and bulk moduli of the polycrystalline {beta}-stabilized uranium 1.6at.%Ga and uranium 2.3at.%Ga alloys between 77 and 300 deg K. (f) Transmission electron microscopy was used to study the crystallography of the martensitic transformation taking place in an U-1.6at.%Ga alloy. (g) The atomistic model proposed for the {beta}-->{alpha} transformation in U(Ga) alloy is based on the crystallographic results and the observed of low activation energy. (h) The correspondence which describes mathematically the way in which the parent {beta}-U and the daughter {alpha}`-U phase are related was calculated by the means of an axis transformation using the known lattice parameters and the orientation relationships between the two structures. 91 refs. 61 figs. 7 tabs.}

place = {Israel}

year = {1994}

month = {Jul}

}

title = {Study of the phase transformations and microstructures of uranium rich alloys of the binary uranium-gallium system}

author = {Dayan, David}

abstractNote = {Three was found little data on the properties of the binary alloy system of uranium-gallium. Therefore, it was chosen to make an extensive investigation of the crystal-phase transformations, crystallography and metallography of this alloy system. Various many experimental techniques were employed. The investigation provided information on the morphology of dilute U(Ga) alloys, on the kinetics and on the mechanism of the crystallography of the martensitic transformation {beta}-->{alpha}`. The main results are: (a) Gallium is soluble in the allotropic {tau} and {beta}-uranium phases. (b) The {delta}-phase corresponds to the stoichiometric U{sub 3}Ga{sub 5} compound. (c) Gallium is a {beta}-stabilizing element similar to chromium. (d) The {beta}-phase is unstable at room temperature and undergoes ultimately a shear-like transformation into the {alpha}`-U, which itself is a metastable variant of the {alpha}-U structure. (e) Ultrasonic sound velocity measurements were used to determine the elastic constants, Young, shear and bulk moduli of the polycrystalline {beta}-stabilized uranium 1.6at.%Ga and uranium 2.3at.%Ga alloys between 77 and 300 deg K. (f) Transmission electron microscopy was used to study the crystallography of the martensitic transformation taking place in an U-1.6at.%Ga alloy. (g) The atomistic model proposed for the {beta}-->{alpha} transformation in U(Ga) alloy is based on the crystallographic results and the observed of low activation energy. (h) The correspondence which describes mathematically the way in which the parent {beta}-U and the daughter {alpha}`-U phase are related was calculated by the means of an axis transformation using the known lattice parameters and the orientation relationships between the two structures. 91 refs. 61 figs. 7 tabs.}

place = {Israel}

year = {1994}

month = {Jul}

}