TY - JOUR
T1 - Deformation behavior and processing maps of Ni3Al-based superalloy during isothermal hot compression
AU - Wu, Yuting
AU - Liu, Yongchang
AU - Li, Chong
AU - Xia, Xingchuan
AU - Huang, Yuan
AU - Li, Huijun
AU - Wang, Haipeng
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017
Y1 - 2017
N2 - To study the hot deformation behavior of Ni3Al-based alloy, hot compression tests were conducted in the temperature range of 1050–1250 °C with the strain rates from 0.01 to 10 s−1. With the increase in deformation temperature and the decrease in strain rate, flow stress of the Ni3Al-based alloy would be decreased. Based on the obtained constitutive equation, the calculated values of peak flow stress are in good agreement with the experimental ones, and the activation deformation energy is determined as 802.71 kJ/mol. Moreover, by dynamic material model (DMM), processing maps of the hot-deformed Ni3Al-based alloys are established. It is indicated that the optimum processing parameters for the studied alloy correspond to deformation temperature of 1250 °C and strain rates from 0.01 to 0.1 s−1. Specimens deformed under the optimum processing conditions exhibit fine and uniform grains, which is a typical dynamic recrystallization (DRX) microstructure. The DRX degree could be effectively enhanced with the increase of deformation temperature and the decrease of strain rate.
AB - To study the hot deformation behavior of Ni3Al-based alloy, hot compression tests were conducted in the temperature range of 1050–1250 °C with the strain rates from 0.01 to 10 s−1. With the increase in deformation temperature and the decrease in strain rate, flow stress of the Ni3Al-based alloy would be decreased. Based on the obtained constitutive equation, the calculated values of peak flow stress are in good agreement with the experimental ones, and the activation deformation energy is determined as 802.71 kJ/mol. Moreover, by dynamic material model (DMM), processing maps of the hot-deformed Ni3Al-based alloys are established. It is indicated that the optimum processing parameters for the studied alloy correspond to deformation temperature of 1250 °C and strain rates from 0.01 to 0.1 s−1. Specimens deformed under the optimum processing conditions exhibit fine and uniform grains, which is a typical dynamic recrystallization (DRX) microstructure. The DRX degree could be effectively enhanced with the increase of deformation temperature and the decrease of strain rate.
KW - Constitutive equation
KW - Dynamic recrystallization
KW - Hot deformation behavior
KW - NiAl-based alloy
KW - Processing map
UR - http://www.scopus.com/inward/record.url?scp=85017654413&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2017.04.116
DO - 10.1016/j.jallcom.2017.04.116
M3 - 文章
AN - SCOPUS:85017654413
SN - 0925-8388
VL - 712
SP - 687
EP - 695
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -