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Title: Characterization of Tri-Lab Tantalum Plate.


Abstract not provided.

; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Secretary of Energy (S)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the TMS Annual Meeting held March 14-19, 2015 in Orlando, FL.
Country of Publication:
United States

Citation Formats

Buchheit, Thomas E., Deibler, Lisa Anne, Michael, Joseph R., Cerreta, Ellen, Chen, Shuh-Rong, and Bingert, John. Characterization of Tri-Lab Tantalum Plate.. United States: N. p., 2015. Web.
Buchheit, Thomas E., Deibler, Lisa Anne, Michael, Joseph R., Cerreta, Ellen, Chen, Shuh-Rong, & Bingert, John. Characterization of Tri-Lab Tantalum Plate.. United States.
Buchheit, Thomas E., Deibler, Lisa Anne, Michael, Joseph R., Cerreta, Ellen, Chen, Shuh-Rong, and Bingert, John. 2015. "Characterization of Tri-Lab Tantalum Plate.". United States. doi:.
title = {Characterization of Tri-Lab Tantalum Plate.},
author = {Buchheit, Thomas E. and Deibler, Lisa Anne and Michael, Joseph R. and Cerreta, Ellen and Chen, Shuh-Rong and Bingert, John},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2015,
month = 3

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  • Previous work by other researches suggest that the r-values measured from thick-gauge tantalum plate do not correspond to the predicted r-values calculated from ODF coefficients. To understand this behavior, bulk texture analysis using neutron diffraction techniques was conducted on annealed samples of Ta and Ta-2.5W plate: the pure tantalum exhibited a primary {l_brace}111{r_brace} type texture whereas the alloy contained a cube texture. For the pure tantalum, the r-values calculated from the texture of as-annealed and the deformed specimens were similar and correlated well with measured data. The r-value of the Ta-2.5W exhibited a greater degree of strain-sensitivity, such that themore » calculated r-values based on the initial texture did not represent those calculated or measured after tensile deformation. Strain sensitivity of r-values in Ta and Ta-2.5W plates is related to the generation of a <{bar 1}10> fiber texture during deformation.« less
  • This report provides a detailed characterization Tri-lab Tantalum (Ta) plate jointly purchased from HCStark Inc. by Sandia, Los Alamos and Lawrence Livermore National Laboratories. Data in this report was compiled from series of material and properties characterization experiments carried out at Sandia (SNL) and Los Alamos (LANL) Laboratories through a leveraged effort funded by the C2 campaign. Results include microstructure characterization detailing the crystallographic texture of the material and an increase in grain size near the end of the rolled plate. Mechanical properties evaluations include, compression cylinder, sub-scale tension specimen, micohardness and instrumented indentation testing. The plate was found tomore » have vastly superior uniformity when compare with previously characterized wrought Ta material. Small but measurable variations in microstructure and properties were noted at the end, and at the top and bottom edges of the plate.« less
  • Clark et al. have shown that significant texture gradients can be produced in rolled tantalum plate and that the strength of the gradient is dependent on the processing path. Texture gradients are often ignored because they are time consuming to characterize and add significant complexity to materials modeling. The variation in texture through the thickness of rolled materials is most commonly measured by sectioning samples to different depths through the thickness of the plate and then measuring the texture from these section planes by X-ray diffraction. A new technique based on automatic indexing of electron backscatter diffraction patterns in themore » scanning electron microscope enables spatially specific orientations to be measured in a practical manner. This technique allows spatial variations in texture to be measured directly enabling gradients in texture to be investigated in more detail than previously possible. This data can be used directly in coupled finite-element/polycrystal-plasticity models to simulate the effects of variations in texture on the plastic behavior of polycrystals. This work examines the variation in texture through the thickness of a tantalum plate and its resultant effect on the compressive deformation of samples prepared from the plate. The characterization of the texture gradient using the automatic point-by-point measurement technique mentioned above is described in detail. The effect of the gradient on the plastic response of through-thickness compression tests is also discussed.« less
  • Complexes of the types M(CHCR/sub 3/)L/sub 2/X/sub 3/, M(CHCR/sub 3/)(OCR/sub 3/)/sub 2/LX, and WO(CHCR/sub 3/)L/sub 2/Cl/sub 2/, where M is Nb or Ta, R is methyl, L is a tertiary phosphine, and X is Cl or Br, showed good activities in metathesis of terminal olefins, including ethylene, propylene, styrene, 1-butene, and cis-2-pentene, at 25/sup 0/C in the presence of traces of AlCl/sub 3/.
  • Abstract not provided.