Plastic deformation of hafnium under uniaxial compression
Document Type
Article
Publication Date
7-1997
Department
Department of Mechanical Engineering-Engineering Mechanics; Department of Materials Science and Engineering
Abstract
The plastic behavior of polycrystalline hafnium (Hf) was investigated over a range of strain rates under uniaxial compression. Hafnium exhibited considerable ductility and a moderately rate-sensitive plastic behavior. The stress-strain response consisted of initial yielding followed by parabolic hardening. Microstructural observations on quasistatically deformed specimens revealed that yielding occurred by dislocation activity and that hardening was dominated by twinning on {101̄2} planes and by slip/twin interactions. A considerable reduction in dislocation and twinning activity was observed in specimens deformed at high strain rates. Failure occurred by shear localization and void growth and coalescence within the shear bands. Measurement of the temperature rise during high strain rate deformation was also made. From these measurements, the fraction of work converted to heat as a function of strain was determined and found to decrease with increasing strain.
Publication Title
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Recommended Citation
Subhash, G.,
Ravichandran, G.,
&
Pletka, B. J.
(1997).
Plastic deformation of hafnium under uniaxial compression.
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science,
28(7), 1479-1487.
http://doi.org/10.1007/s11661-997-0210-7
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/5067