Metallurgy, Vol. 46 No. 2, 2007.
Preliminary communication
Influence of the Loading and Strain Rates on the Strength Properties and Formability of Higher-Strength Sheet
M. Mihalikova
J. Janek
Abstract
The paper analyses the influence of the loading rate in the interval from 1 to 1000 mm/min, which corresponds to the tensile machine working range, on the strength properties and the formability characteristics obtained on standard and notched test bars made of H340 LAD steel strips. The combination of the loading rate and the test bar type made it possible to obtain the relationships of monitored variables in the strain rate interval from 10–4 to 10 s–1. In this interval, the strength properties of the tested strips thick 1, 1,5 and 1,8 mm exponentially increase, but formability does not change up to the strain rate of 1 s–1.
Keywords
steel strips; loading rate; strain rate; strength properties; formability
Hrčak ID:
7006
URI
Publication date:
18.1.2007.
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