Hostname: page-component-6bf8c574d5-t27h7 Total loading time: 0 Render date: 2025-02-16T01:12:39.069Z Has data issue: false hasContentIssue false
  • English
  • Français

Grain Rotations during Tensile Deformation of Columnar Tantalum

Published online by Cambridge University Press:  15 February 2011

B.S. El-Dasher ,
B. L. Adams  and
A. D. Rollett
B.S. El-Dasher
Affiliation:
Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15032, USA
B. L. Adams
Affiliation:
Mechanical Engineering, Brigham Young University, Provo, UT 84602, USA
A. D. Rollett
Affiliation:
Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15032, USA
Get access

Abstract

We report on tensile tests performed on thin sheet samples of tantalum that have a nearcolumnar structure. By annealing sheet of approximately 1 mm thickness at high temperatures, a columnar structure is generated with grain boundaries nearly perpendicular to the flat surfaces. The purpose of the experiments is to investigate the mechanical behavior in terms of crystal plasticity in a geometry that is readily amenable to both experimental characterization and computer simulation. Automated electron backscatter diffraction (EBSD) has been used to obtain orientation maps both before and after deformation. For the small strains used in this study (<10%), the grains deform rather uniformly with little evidence of cell formation. Analysis of the lattice rotations shows considerable scatter in the rotation axis and demonstrates significant disagreement with polycrystal plasticity calculations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 779: Symposium W – Multiscale Phenomena in Materials - Experiments and Modeling Related to Mechanical Behavior , 2003 , W6.1
Copyright
Copyright © Materials Research Society 2003

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Stolken, J. S., King, W. E., Schwartz, A. J., Campbell, G. H., and Balooch, M., in Advanced Materials for the 21st Century: 1999 Julia R. Weertman Symposium, edited by Chung, Y-W., Dunand, D.C., Liaw, P.K., and Olson, G.B., (Miner. Metals & Mater. Soc. Proc., Warrendale, PA, 1999) pp. 59–70 Google Scholar
2. Wasserbach, W., Phys. Stat. Solidi A 147, (1995).Google Scholar
3. Adams, B.L., Wright, S.I. and Kunze, K., Met. Trans., 24A[4] 819 (1993).Google Scholar
4. Handscomb, D.C., Canad. J. Math, 10, 85 (1958)Google Scholar
5. Morawiec, A., “A Note on Mean Orientation,” J. Appl. Cryst., 31, 818–819 (1998).Google Scholar
6. King, W.E., Stölken, J.S., Kumar, M., Schwartz, A.J., “Strategies for Analysis of EBSD Datasets”, Electron Backscatter Diffraction in Materials Science, ed. Schwartz, A.J., Kumar, Mukul, and Adams, Brent L. (Kluwer, 2000) Chap. 12.Google Scholar
7. Kallend, J.S., Kocks, U. F., et al., Mater. Sci. and Engineering A132, 1–11 (1991).Google Scholar
8. Kallend, J. and Davies, G., Phil. Mag. 25, 471–490 (1972).Google Scholar
9. Bishop, J. and Hill, R., Phil. Mag. 42, 414–427 (1951).Google Scholar
10. Bishop, J. and Hill, R., Phil. Mag. 42, 1298–1307 (1951).Google Scholar
11. Kocks, U., Argon, A., et al., Prog. Mat. Sci. 19, 1 (1975).Google Scholar
12. Hutchinson, J., Proceedings of the Royal Society of London A319, 247 (1970).Google Scholar
13. Asaro, R. and Needleman, A., Acta Met, 33, 923–953 (1985).Google Scholar
14. Honneff, H. and Mecking, H., in Proc. ICOTOM-5 (Springer, Berlin, W. Germany, 1978) pp. 265 Google Scholar
15. Rollett, A. D., Canova, G. R. and Kocks, U. F. in Metal Formability and Microstructure, edited by Sachdev, A. K. and Embury, J. D., (TMS-AIME Proc., Warrendale, PA, 1986) pp. 147 Google Scholar
16. Panchanadeeswaran, S., Doherty, R.D., and Becker, R., Acta Met. 44, 1233–1262 (1996)Google Scholar
17. Panchanadeeswaran, S., Becker, R., Doherty, R.D., and Kunze, K., Mat. Sci. Forum 157-162, 1277–1282 (1994)Google Scholar