Orientation Imaging Microscopy Investigation of the Compression Deformation of a [011] Ta Single Crystal

[+] Author and Article Information
A. J. Schwartz, W. E. King, G. H. Campbell, J. S. Stölken, D. H. Lassila

Lawrence Livermore National Laboratory, Materials Science and Technology Division, Livermore, CA 94550

S. Sun, B. L. Adams

Materials Science and Engineering Department, Carnegie Mellon University, Pittsburgh, PA 15213

J. Eng. Mater. Technol 121(2), 178-181 (Apr 01, 1999) (4 pages) doi:10.1115/1.2812364 History: Received October 04, 1998; Revised November 11, 1998; Online November 27, 2007


High-purity tantalum single crystal cylinders oriented with [011] parallel to the cylinder axis were deformed 10, 20, and 30 percent in compression. The samples took on an ellipsoidal shape during testing, elongated along the [100] direction with almost no dimensional change along [01 1]. Two orthogonal sectioning planes were selected for characterization using Orientation Imaging Microscopy (OIM): one in the plane containing [100] and [011] (longitudinal) and the other in the plane containing [01 1] and [011] (transverse). OIM revealed patterns of alternating crystal rotations that develop as a function of strain and exhibit evolving length scales. The spacing and magnitude of these alternating misorientations increase in number density and decrease in spacing with increasing strain.

Copyright © 1999 by The American Society of Mechanical Engineers
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