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In-situ neutron diffraction characterization of temperature dependence deformation in α-uranium

Journal Article · · Journal of Nuclear Materials
 [1];  [2];  [3];  [1]
  1. Univ. of Virginia, Charlottesville, VA (United States)
  2. Y-12 National Security Complex, Oak Ridge, TN (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
+ Show Author Affiliations
In-situ strain neutron diffraction measurements were conducted at temperature on specimens coming from a clock-rolled α-uranium plate, and Elasto-Plastic Self-Consistent (EPSC) modeling was employed to interpret the findings. The modeling revealed that the active slip systems exhibit a thermally activated response, while deformation twinning remains athermal over the temperature ranges explored (25-150 °C). The modeling also allowed assessment of the effects of thermal residual stresses on the mechanical response during compression. These results are consistent with those from a prior study of room-temperature deformation, indicating that the thermal residual stresses strongly influence the internal strain evolution of grain families, as monitored with neutron diffraction, even though accounting for these residual stresses has little effect on the macroscopic flow curve, except in the elasto-plastic transition.
Research Organization:
Oak Ridge Y-12 Plant (Y-12), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
NA0001942
OSTI ID:
1478070
Alternate ID(s):
OSTI ID: 22749536
Report Number(s):
IROS302
Journal Information:
Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Journal Issue: C Vol. 502; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

Figures / Tables (10)

Figure 1(p. 5)figure Figure 1
Table 1(p. 9)table Table 1
Figure 2(p. 10)figure Figure 2
Figure 3(p. 11)figure Figure 3
Figure 4(p. 13)figure Figure 4
Figure 5(p. 13)figure Figure 5
Figure 6(p. 14)figure Figure 6
Table 2(p. 15)table Table 2
Figure 7(p. 17)figure Figure 7
Figure 8(p. 19)figure Figure 8

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Related Subjects

36 MATERIALS SCIENCE
EPSC
Elasto-Plastic Self-Consistent modeling
deformation modes
internal strain
neutron diffraction
residual strain
twinning
uranium