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Plastic deformation of polycrystalline zirconium carbideThe compressive yield strength of arc-melted polycrystalline zirconium carbide has been found to vary from 77 kg per sq mm at 1200 C to 19 kg per sq mm at 1800 C. Yield drops were observed with plastic strain-rates greater than 0.003/sec but not with slower strain rates. Strain-rate change experiments yielded values for the strain-rate sensitivity parameter m which range from 6.5 at 1500 C to 3.8 at 1800 C, and the product dislocation velocity stress exponent times T was found to decrease linearly with increasing temperature. The deformation rate results are consistent with the Kelly-Rowcliffe model in which the diffusion of carbon assists the motion of dislocations.
Document ID
19760037565
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Darolia, R.
(Washington Univ. Seattle, WA, United States)
Archbold, T. F.
(Washington, University Seattle, Wash., United States)
Date Acquired
August 8, 2013
Publication Date
February 1, 1976
Publication Information
Publication: Journal of Materials Science
Volume: 11
Subject Category
Metallic Materials
Accession Number
76A20531
Funding Number(s)
CONTRACT_GRANT: NGL-48-202-004
Distribution Limits
Public
Copyright
Other

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