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In situ analysis of texture development from sinusoidal stress at high pressure and temperature

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.4937398· OSTI ID:1421562

Here, we present a new experimental protocol to investigate the relationship between texture, plastic strain, and the mechanisms of plastic deformation at high pressure and temperature. The method utilizes synchrotron X-ray radiation as the probing tool, coupled with a large-volume high pressure deformation device (D-DIA). The intensity of X-ray diffraction peaks within the spectrum of the sample is used for sampling texture development in situ. The unique feature of this study is given by the sinusoidal variation of the intensity when a sinusoidal strain is applied to the sample. For a sample of magnesium oxide at elevated pressure and temperature, we demonstrate observations that are consistent with elasto-plastic models for texture development and for diffraction-peak measurements of apparent stress. The sinusoidal strain magnitude was 3%.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-98CH10886
OSTI ID:
1421562
Alternate ID(s):
OSTI ID: 22482670
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 12 Vol. 86; ISSN 0034-6748
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English

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