TY - JOUR
T1 - Three-dimensional elastoplastic phase-field simulation of γ′ rafting and creep deformation
AU - Yang, Min
AU - Zhang, Jun
AU - Wei, Hua
AU - Gui, Weimin
AU - Jin, Tao
AU - Liu, Lin
N1 - Publisher Copyright:
© 2017, Springer Science+Business Media, LLC.
PY - 2017/12/1
Y1 - 2017/12/1
N2 - A modified phase-field model coupling viscoplastic constitutive equations has been built up to simulate the creep process of nickel-base single-crystal superalloys at 1223 K/300 MPa. The kinematic and isotropic hardening effects as well as interactions of slip systems are included in the present model. Under the external tension along [001] direction, the plastic strain prefers to concentrate in the channel vertical to [001] direction, promoting γ′ precipitate to raft along the direction vertical to [001] direction. The interactions between slip systems alter the value of plastic strain and thus the stress field in inner γ channel. In turn, the stress field readjusts the plastic deformation. The simulative results and experimental data are in good agreement in the initial creep stage. In addition, this modified model gives a possibility to simulate the microstructure evolution during cycle fatigue.
AB - A modified phase-field model coupling viscoplastic constitutive equations has been built up to simulate the creep process of nickel-base single-crystal superalloys at 1223 K/300 MPa. The kinematic and isotropic hardening effects as well as interactions of slip systems are included in the present model. Under the external tension along [001] direction, the plastic strain prefers to concentrate in the channel vertical to [001] direction, promoting γ′ precipitate to raft along the direction vertical to [001] direction. The interactions between slip systems alter the value of plastic strain and thus the stress field in inner γ channel. In turn, the stress field readjusts the plastic deformation. The simulative results and experimental data are in good agreement in the initial creep stage. In addition, this modified model gives a possibility to simulate the microstructure evolution during cycle fatigue.
UR - http://www.scopus.com/inward/record.url?scp=85028745464&partnerID=8YFLogxK
U2 - 10.1007/s10853-017-1470-2
DO - 10.1007/s10853-017-1470-2
M3 - 文章
AN - SCOPUS:85028745464
SN - 0022-2461
VL - 52
SP - 13940
EP - 13947
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 24
ER -