The strain hardening coefficient us temperature
was also determined and plotted, as seen in Fig. 6.
The results indicated that the trends of the variations
of strain hardening coefficient were similar to the ultimate
tensile strength. The increment of the ultimate
tensile strength at 300 "C can be explained by
the increase in the work hardening at this temperature.
After 200 'C, the value of the work hardening
was increased from O. 159 to O. 171 for the rolling direction,
0.145 to 0.169 for the diagonal direction,
and O. 150 to O. 172 for the transverse direction, respectively.
These results are very important in terms
of modelling. These behaviours should be modelled
accurately; otherwise, the experiment and numerical
results will not be in accordance with each other
The strain hardening coefficient us temperaturewas also determined and plotted, as seen in Fig. 6.The results indicated that the trends of the variationsof strain hardening coefficient were similar to the ultimatetensile strength. The increment of the ultimatetensile strength at 300 "C can be explained bythe increase in the work hardening at this temperature.After 200 'C, the value of the work hardeningwas increased from O. 159 to O. 171 for the rolling direction,0.145 to 0.169 for the diagonal direction,and O. 150 to O. 172 for the transverse direction, respectively.These results are very important in termsof modelling. These behaviours should be modelledaccurately; otherwise, the experiment and numericalresults will not be in accordance with each other
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