TY - JOUR
T1 - Correcting the stress-strain curve in hot compression process to high strain level
AU - Li, Y. P.
AU - Onodera, E.
AU - Matsumoto, H.
AU - Chiba, A.
N1 - Funding Information:
This research was supported by a Cooperation of Innovative Technology and Advanced Research in Evolutional Area from Ministry of Education, Culture, Sports, Science and Technology of Japan. The authors of this research thank Yamanaka Eng. Co. Ltd., Osaka, Japan for partly supporting this research.
PY - 2009
Y1 - 2009
N2 - This article provides a model that regards the evolution behavior of the friction coefficient in the cylindrical compression test as a function of true strain on the basis of experimental results, allowing the effect of friction on the deformation curve at extremely high strain level to be evaluated and corrected for the first time. The compressive tests were carried out at a stroke rate of 1.2 mm/s on IHS38MSV hypoeutectoid steel with various lubricants at temperatures ranging from 800 °C to 1200 °C. The results showed that the friction coefficient for the compressive process was not constant and the variation could be approximated by an exponential equation along with the true strain. Microstructure observation showed that the stress increase in the later stages of process should be closely related to the large increase in the friction coefficient. The corrected curves were found to correlate well with the microstructure observation.
AB - This article provides a model that regards the evolution behavior of the friction coefficient in the cylindrical compression test as a function of true strain on the basis of experimental results, allowing the effect of friction on the deformation curve at extremely high strain level to be evaluated and corrected for the first time. The compressive tests were carried out at a stroke rate of 1.2 mm/s on IHS38MSV hypoeutectoid steel with various lubricants at temperatures ranging from 800 °C to 1200 °C. The results showed that the friction coefficient for the compressive process was not constant and the variation could be approximated by an exponential equation along with the true strain. Microstructure observation showed that the stress increase in the later stages of process should be closely related to the large increase in the friction coefficient. The corrected curves were found to correlate well with the microstructure observation.
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U2 - 10.1007/s11661-009-9783-7
DO - 10.1007/s11661-009-9783-7
M3 - Article
AN - SCOPUS:64849095643
SN - 1073-5623
VL - 40
SP - 982
EP - 990
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 4
ER -