THE EFFECT OF STRAIN RATE ON YIELDING IN HIGH-STRENGTH STEELS.
WATERVLIET ARSENAL N Y BENET LABS
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The effect of strain rates ranging from 0.0001 to 10 ininsec. 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 ininsec, 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. Author
- Properties of Metals and Alloys