angielski term
reduction level
The experimental parameters considered include three different pre-heating temperatures and two asymmetry ratios, while the reduction level is maintained constant for both rolling configurations.
5 +1 | gniot |
Joanna Rączka
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Oct 27, 2011 17:25: Joanna Rączka changed "Field (specific)" from "Materiały (plastik, ceramika itp.)" to "Metalurgia/odlewnictwo"
Discussion
The EBSD analysis has been performed on all the sample completely reduced (because they show the best mechanical properties) and on a sample rolled only 3 passes at 1200 °C in order to evaluate the development and evolution of crystallographic textures.
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The studied DSS belongs to the grade EN 1.4462 and the experimental parameters include three different pre-heating
temperatures and three asymmetric ratios, imposing a single reduction level by several rolling passes.
The DSS has been studied in different conditions:
•hot rolled condition (HR): after heating in a resistance furnace for 2 hours, the supplied slabs have been rolled
through the laboratory mill. A reduction level of about 70%, reached in 7 passes, was realized without introduction
of any lubricant while the total time undertaken by the rolling procedure from start to end is about 133 s. In
literature is already known that the increase of the applied reduction up to 70-90% can play a favourable role on the
normal anisotropy, the hardening coefficient and the total elongation.
Starting from these arguments, it might be consistent to assume
that thanks to the favourable crystallographic textures induced by the deep penetration of the shear strains, the
asymmetric route provides mechanical properties that can be matched by the symmetric rolling only at way higher
re