The Effect of Strain Rate on Yielding in High Strength Steels

[+] Author and Article Information
D. P. Kendall, T. E. Davidson

Physical and Mechanical Metallurgy Laboratory, Watervliet Arsenal, Watervliet, N. Y.

J. Basic Eng 88(1), 37-44 (Mar 01, 1966) (8 pages) doi:10.1115/1.3645838 History: Received July 29, 1965; Online November 03, 2011


The effect of strain rates ranging from 10−4 to 10 in/in/sec on the yield strengths of several high strength alloy steels is investigated. Quenched and tempered-type alloys exhibit two regions of strain-rate sensitivity with the strain rate dividing the sensitive and insensitive regions varying from 0.5 to greater than 10 in/in/sec, depending on composition, microstructure and grain size. At the higher rates a power-law relationship is found which is consistent with a yielding model involving breakaway of dislocations from solute atmospheres. Maraging steel exhibits a continuous power law-strain rate sensitivity over the entire range.

Copyright © 1966 by ASME
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