Dissertation/Thesis Abstract

The yield strength and flow stress anomaly in B2 yttrium copper
by Becker, Andrew Todd, Ph.D., Iowa State University, 2010, 154; 3438670
Abstract (Summary)

The apparent yield strength anomaly in the B2 YCu intermetallic compound is shown not to be a yield point anomaly at all, but rather a phenomenon resulting from the work hardening behavior in YCu, which was found to rise with rising temperature and to drop with increases in strain rate. This effect is shown to occur over temperature ranges where YCu has negative strain rate sensitivity, result in dynamic strain ageing behavior, and the effect is shown to be irreversible when the testing temperature is changed. Neutron diffraction experiments utilizing SMARTS and HIPPO show the evolution of texture and the change in plastic deformation behavior as the temperature is raised.

Indexing (document details)
Advisor: Gschneidner, Karl A., Russell, Alan M.
Commitee: Anderson, Iver E., Bastawros, Ashraf, Chumbley, Scott
School: Iowa State University
Department: Materials Science and Engineering
School Location: United States -- Iowa
Source: DAI-B 72/03, Dissertation Abstracts International
Source Type: DISSERTATION
Subjects: Materials science
Keywords: Flow stress, Strain aging, Strain rate sensitivity, Yield strength, Yttrium copper
Publication Number: 3438670
ISBN: 978-1-124-42900-7
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